727 + Interview Questions in GENERAL QA IN NEET Page 10 InterviewSolution

451.	During "gene cloning" which is called "gene taxi" :–(a) Vaccine (b) Plasmid(c) Bacterium (d) Protozoa
Answer» Correct Option (b) Plasmid

Discussion

452.	Haploids are more suitable for mutation studies than the diploids. This is because :– [a] haploids are more abundant in nature than diploids [b] all mutations, whether dominant or recessive are expressed in haploids [c] haploids are reproductively more stable than diploids [d] mutagens penetrate in haploids more effectively than in diploids
Answer» Correct option [b] all mutations, whether dominant or recessive are expressed in haploids

452.

Haploids are more suitable for mutation studies than the diploids. This is because :– [a] haploids are more abundant in nature than diploids [b] all mutations, whether dominant or recessive are expressed in haploids [c] haploids are reproductively more stable than diploids [d] mutagens penetrate in haploids more effectively than in diploids

Answer»

Correct option [b] all mutations, whether dominant or recessive are expressed in haploids

Discussion

453.	Chiasmata are formed during meiosis :–(a) before metaphase –I(b) after metaphase –I(c) during prophase –II(d) during metaphase –II
Answer» Correct Option (a) before metaphase –I

Discussion

454.	In man, sperms contain autosomes and :–(a) both X and Y chromosomes(b) only Y chromosome(c) either X or Y chromosome(d) only X chromosomes
Answer» Correct Option (a) both X and Y chromosomes

Discussion

455.	Mcirosporogenesis is the :–(a) Development of megaspore(b) Development of pollen grain(c) Development of male gametophyte(d) Development of female gametophyte
Answer» Correct Option (b) Development of pollen grain

455.

Mcirosporogenesis is the :–(a) Development of megaspore(b) Development of pollen grain(c) Development of male gametophyte(d) Development of female gametophyte

Answer»

Correct Option (b) Development of pollen grain

Discussion

456.	The yeast commonly known as baker's yeast is :– [a] Saccharomyces cerevisiae [b] Saccharomyces ludwigii [c] Saccharomyces octosporus [d] Schizosaccharomyces
Answer» Correct option [a] Saccharomyces cerevisiae

456.

The yeast commonly known as baker's yeast is :– [a] Saccharomyces cerevisiae [b] Saccharomyces ludwigii [c] Saccharomyces octosporus [d] Schizosaccharomyces

Answer»

Correct option [a] Saccharomyces cerevisiae

Discussion

457.	How many ATPs are in all generated in respiration :–(a) 36 (b) 38(c) 12 (d) 4
Answer» Correct Option (b) 38

Discussion

458.	An in situ method of conservation is :–[a] botanical garden [b] national park[c] genetic engineering [d] cryopreservation
Answer» Correct option [b] national park

458.

An in situ method of conservation is :–[a] botanical garden [b] national park[c] genetic engineering [d] cryopreservation

Answer»

Correct option [b] national park

Discussion

459.	Pneumatophores occur in(1) Halophytes(2) Free-floating hydrophytes(3) Carnivorous plants(4) Submerged hydrophytes
Answer» The correct option is(3) Carnivorous plants Explanation: Pneumatophores are breathing or respiratory roots which are found in halophytes like mangroves. Halophytes grow in saline swamps, therefore respiratory roots come out of the water and pick up oxygen for respiration. Excess CO₂ is also given out. It occurs through small pores, called Ienticles. Carnivorous plants, free-floating hydrophytes and submerged hydrophytes do not possess pneumatophores.

459.

Pneumatophores occur in(1) Halophytes(2) Free-floating hydrophytes(3) Carnivorous plants(4) Submerged hydrophytes

Answer»

The correct option is(3) Carnivorous plants

Explanation:

Pneumatophores are breathing or respiratory roots which are found in halophytes like mangroves. Halophytes grow in saline swamps, therefore respiratory roots come out of the water and pick up oxygen for respiration. Excess CO₂ is also given out. It occurs through small pores, called Ienticles.

Carnivorous plants, free-floating hydrophytes and submerged hydrophytes do not possess pneumatophores.

Discussion

460.	Consider the following statements.I. Phenylketonuria is an autosomal recessive trait.II. Thalassemia is an autosomal recessive trait.III. Down’s syndrome is due to the trisomy of chromosome number 21.IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes.The incorrect statement is(a) Only I b) Only II(c) Only III(d) Only IV
Answer» The incorrect statement is : (d) Only IV IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes. The statement IV is incorrect. It is corrected as follows Turner’s syndrome is caused due to the absence of one of the X-chromosomes, i.e. 45 with XO. Such persons are sterile females who have rudimentary ovaries and undeveloped breasts.

460.

Consider the following statements.I. Phenylketonuria is an autosomal recessive trait.II. Thalassemia is an autosomal recessive trait.III. Down’s syndrome is due to the trisomy of chromosome number 21.IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes.The incorrect statement is(a) Only I b) Only II(c) Only III(d) Only IV

Answer»

The incorrect statement is : (d) Only IV

IV. Turner’s syndrome is caused due to the absence of one of the Y-chromosomes.

The statement IV is incorrect. It is corrected as follows Turner’s syndrome is caused due to the absence of one of the X-chromosomes, i.e. 45 with XO. Such persons are sterile females who have rudimentary ovaries and undeveloped breasts.

Discussion

461.	Two balls of masses M1 and M2 are placed on horizontal frictionless table connected by a spring as shown in figure, how mass M2 is pulled to the right with a force F ? If the acceleration of mass M1 is a, then acceleration of mass M2 will be(a) F/M1(b) F-M1a/M2(c) F/M2(d) None of these
Answer» Correct Option (b) F-M₁a/M₂ Explanation : For acting on mass M₁ is f = M₁a. Mass M₁ will pull mass M₂ towards left with a force F = M_aa. Net force acting on mass M₂ = F - t = F -M₁a Acceleration of mass M₂ = F-M₁a/M₂

461.

Two balls of masses M1 and M2 are placed on horizontal frictionless table connected by a spring as shown in figure, how mass M2 is pulled to the right with a force F ? If the acceleration of mass M1 is a, then acceleration of mass M2 will be(a) F/M1(b) F-M1a/M2(c) F/M2(d) None of these

Answer»

Correct Option (b) F-M₁a/M₂

Explanation :

For acting on mass M₁ is f = M₁a. Mass M₁ will pull mass M₂ towards left with a force F = M_aa.

Net force acting on mass M₂ = F - t = F -M₁a

Acceleration of mass M₂ = F-M₁a/M₂

Discussion

462.	Two chromatin fibre per chromosome is present in(a) G1 (b) G2 (c) S (d) Telophase
Answer» Correct Option (a) G₁

Discussion

463.	Which of the following is incorrect about eutrophication ? (a) Found in all ecosystems (b) Leads to organic loading (c) Bloom formatino is eutrophic water (d) Enrichment with plant nutrients
Answer» Correct Option (a) Found in all ecosystems

Discussion

464.	Clotting is a process via which flow of blood from the wound stops naturally. A step of clotting is given belows identify the correct catalyst Fibrinogen → Fibrin (a) prothrombium (b) thrombium (c) thrombin (d) thromboplastin
Answer» Correct Option (c) thrombin

464.

Clotting is a process via which flow of blood from the wound stops naturally. A step of clotting is given belows identify the correct catalyst Fibrinogen → Fibrin (a) prothrombium (b) thrombium (c) thrombin (d) thromboplastin

Answer»

Correct Option (c) thrombin

Discussion

465.	Steps of relaxation are : I. Discharge of neuron II. Relase of Ca+2 from troponin III. Generation of end plate potential IV. Cessatino of interaction between actin and myosin. (a) I, II, III and IV (b) II and IV (c) I, II and III (d) I, III and IV
Answer» Correct Option (b) II and IV

Discussion

466.	Which one of the statement given below is not correct (a) Kreb's cycle is a common pathway of oxidative breakdown of carbohydrates, fatty acids and amino acids (b) The energy present in one gram carbohydrate in 4.4 kcal or 18.4 kJ (c) When protein are used as respiratory substrate respiration is called protoplasmic respiration (d) the energy present in one gram of fat is 4.8 k cal or 20 kJ
Answer» Correct Option (d) the energy present in one gram of fat is 4.8 k cal or 20 kJ

Discussion

467.	Genetically modified foods contain : (a) same number of genes as conventional crop (b) Same number of genes as hybrid crop (c) one of two additional genes (d) hundreds of additional genes
Answer» Correct Option (c) one of two additional genes

Discussion

468.	Which of the following statements is correct for Cromagnon man ? (a) Advanced stage of man's evolution than Homo erectus (b) Predecessor of Homo neanderthalensis (c) Direct ancestor of man (d) Lived during last ice age
Answer» Correct Option (c) Direct ancestor of man

Discussion

469.	During photorespiration, the conversion of phosphoglycolate to glycolate takes place in which cell organelle : (a) Mitochondria (b) Peroxisome (c) Chloroplast (d) Glyoxysome
Answer» Correct Option (c) Chloroplast

469.

During photorespiration, the conversion of phosphoglycolate to glycolate takes place in which cell organelle : (a) Mitochondria (b) Peroxisome (c) Chloroplast (d) Glyoxysome

Answer»

Correct Option (c) Chloroplast

Discussion

470.	Match the items given in Column I with those in Column II and select the correct option given below :-Column-I Column-II(a) Herbariumi. It is a place having a collection of preserved plants and animals.(b) Keyii. A list that enumerates methodically all the species found in an area with brief description aiding identification.(c) Museum iii.Is a place where dried and pressed plant specimens mounted on sheets are kept.(d) Catalogue iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.abcd(1)iiviiiii(2)iiiiiiiv(3)iiiviiii(4)iiiiviii
Answer» The correct option is(4) Explanation: Herbarium is a place where dried and pressed plant specimens, mounted on sheets are kept systematically. It is a repository or store house for future use. Key is a booklet containing a list of characters and their alternates which are helpful in the identification of various taxa-class, order, family, genus and species. Museum is an institution where artistic and educational materials are exhibited to the public. The materials available for observation and study are called a collection. Catalogue is a list or register that enumerates methodically all the species found in a particular place. It often possesses a brief description of species that aids in identification. Therefore, option (4) is correct.

470.

Match the items given in Column I with those in Column II and select the correct option given below :-Column-I Column-II(a) Herbariumi. It is a place having a collection of preserved plants and animals.(b) Keyii. A list that enumerates methodically all the species found in an area with brief description aiding identification.(c) Museum iii.Is a place where dried and pressed plant specimens mounted on sheets are kept.(d) Catalogue iv. A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.abcd(1)iiviiiii(2)iiiiiiiv(3)iiiviiii(4)iiiiviii

Answer»

The correct option is(4)

Explanation:

Herbarium is a place where dried and pressed plant specimens, mounted on sheets are kept systematically. It is a repository or store house for future use. Key is a booklet containing a list of characters and their alternates which are helpful in the identification of various taxa-class, order, family, genus and species.

Museum is an institution where artistic and educational materials are exhibited to the public. The materials available for observation and study are called a collection.

Catalogue is a list or register that enumerates methodically all the species found in a particular place. It often possesses a brief description of species that aids in identification.

Therefore, option (4) is correct.

Discussion

471.	Secondary xylem and phloem in dicot stem are produced by(1) Apical meristems(2) Vascular cambium(3) Phellogen(4) Axillary meristems
Answer» The correct option is(2) Vascular cambium Explanation: Secondary vascular tissues, i.e., secondary xylem and phloem are formed by the vascular cambium. It is produced by two types of meristems; fascicular or intrafascicular and interfascicular cambium. Intrafascicular cambium is a primary meristem which occurs as strips in vascular bundles. It divides to form secondary phloem on outer side and secondary xylem on the inner side. Interfascicular cambium arises secondarily from the cells of medullary rays. Phellogen or cork cambium is produced in the outer cortical cells of dicot stems. lt is helpful in increasing the girth. Apical meristems are present at the tips of stem, root and their branches. They are responsible for the or increase in length of the plant, Axillary meristem is found in axillary Luds. These cells are ieft behind from shoot apical meristem during the formation of leaves and elongation of stems.

471.

Secondary xylem and phloem in dicot stem are produced by(1) Apical meristems(2) Vascular cambium(3) Phellogen(4) Axillary meristems

Answer»

The correct option is(2) Vascular cambium

Explanation:

Secondary vascular tissues, i.e., secondary xylem and phloem are formed by the vascular cambium. It is produced by two types of meristems; fascicular or intrafascicular and interfascicular cambium. Intrafascicular cambium is a primary meristem which occurs as strips in vascular bundles.

It divides to form secondary phloem on outer side and secondary xylem on the inner side. Interfascicular cambium arises secondarily from the cells of medullary rays.

Phellogen or cork cambium is produced in the outer cortical cells of dicot stems. lt is helpful in increasing the girth. Apical meristems are present at the tips of stem, root and their branches. They are responsible for the or increase in length of the plant, Axillary meristem is found in axillary Luds. These cells are ieft behind from shoot apical meristem during the formation of leaves and elongation of stems.

Discussion

472.	The transparent lens in the human eye is held in its place by(1) ligaments attached to the ciliary body(2) ligaments attached to the iris(3) smooth muscles attached to the iris(4) smooth muscles attached to the ciliary body
Answer» The correct option is(1) ligaments attached to the ciliary body Explanation: The lens in the human eye is held in place by the suspensory ligaments attached to the ciliary body. The function of other components are as follows The smooth muscles attached to the ciliary body helps to control the shape of lens. Smooth muscles of iris help in regulating the diameter of the pupil. Pectinate ligament attached to Iris is involved in the drainage of aqueous humor because it contains spaces between the fibers.

472.

The transparent lens in the human eye is held in its place by(1) ligaments attached to the ciliary body(2) ligaments attached to the iris(3) smooth muscles attached to the iris(4) smooth muscles attached to the ciliary body

Answer»

The correct option is(1) ligaments attached to the ciliary body

Explanation:

The lens in the human eye is held in place by the suspensory ligaments attached to the ciliary body. The function of other components are as follows

The smooth muscles attached to the ciliary body helps to control the shape of lens.
Smooth muscles of iris help in regulating the diameter of the pupil.
Pectinate ligament attached to Iris is involved in the drainage of aqueous humor because it contains spaces between the fibers.

Discussion

473.	Match the items given Column I with those in Column II and select the correct option given below :Column IColumn IIa. Tidal volumei. 2500-3000 mLb. Inspiratory Reserve volumeii. 1100-1200 mLc. Expiratory Reserve volumeiii. 500-550 mLd. Residual volume iv. 1000-1100 mLabcd1iiiiiiiv2iiiiivii3iiviiiii4iviiiiii
Answer» The correct option is (2) Explanation: Tidal Volume (TV) is the volume of air inspired or expired during a normal breath. It is about 500-550 mL. Inspiratory Reserve Volume (IRV) is the extra amount of air that can be inspired directly after a normal inspiration. It is about 2500-3000 mL. Expiratory Reserve volume (ERV) is the extra amount of air that can be expired forcibly after a normal expiration. It is about 1000-1100 mL. Residual Volume (RV) is the volume of air which remains still in the lung after the most forceful expiration. It is about 1100- 1200 mL. Therefore, option (2) is correct.

473.

Match the items given Column I with those in Column II and select the correct option given below :Column IColumn IIa. Tidal volumei. 2500-3000 mLb. Inspiratory Reserve volumeii. 1100-1200 mLc. Expiratory Reserve volumeiii. 500-550 mLd. Residual volume iv. 1000-1100 mLabcd1iiiiiiiv2iiiiivii3iiviiiii4iviiiiii

Answer»

The correct option is (2)

Explanation:

Tidal Volume (TV) is the volume of air inspired or expired during a normal breath. It is about 500-550 mL.

Inspiratory Reserve Volume (IRV) is the extra amount of air that can be inspired directly after a normal inspiration. It is about 2500-3000 mL.

Expiratory Reserve volume (ERV) is the extra amount of air that can be expired forcibly after a normal expiration. It is about 1000-1100 mL.

Residual Volume (RV) is the volume of air which remains still in the lung after the most forceful expiration. It is about 1100- 1200 mL.

Therefore, option (2) is correct.

Discussion

474.	Which of the following organisms are known as chief producers in the oceans ?(1) Dinoflagellates(2) Diatoms(3) Cyanobacteria(4) Euglenoids
Answer» The correct option is(2) Diatoms Explanation: Diatoms are chief producers in the oceans and they contribute 40% of marine primary productivity. They constitute a major group of unicellular eukaryotic microalgae and are among the most common types of phytoplanktons. The other given organisms also exhibit autotrophic mode of nutrition.

474.

Which of the following organisms are known as chief producers in the oceans ?(1) Dinoflagellates(2) Diatoms(3) Cyanobacteria(4) Euglenoids

Answer»

The correct option is(2) Diatoms

Explanation:

Diatoms are chief producers in the oceans and they contribute 40% of marine primary productivity. They constitute a major group of unicellular eukaryotic microalgae and are among the most common types of phytoplanktons.

The other given organisms also exhibit autotrophic mode of nutrition.

Discussion

475.	All of the following are part of an operon except :-(1) an operator(2) structural genes(3) an enhancer(4) a promoterAll of the following are part of an operon except :-(1) an operator(2) structural genes(3) an enhancer(4) a promoter
Answer» The correct option is(3) an enhancer Explanation: Except enhancer, all the given components are parts of an operon. Enhancer sequences are present in eukaryotes that, when bound by specific proteins or transcription factors, enhance the transcription of an associated gene. On the other hand, operon is a regulatory unit of DNA containing a cluster of genes in prokaryotes. The promoter of operon is the site where RNA polymerase binds. The operator acts as on-off switch to control transcription. The structural genes code for enzymes involved in metabolic Pathway.

475.

All of the following are part of an operon except :-(1) an operator(2) structural genes(3) an enhancer(4) a promoterAll of the following are part of an operon except :-(1) an operator(2) structural genes(3) an enhancer(4) a promoter

Answer»

The correct option is(3) an enhancer

Explanation:

Except enhancer, all the given components are parts of an operon. Enhancer sequences are present in eukaryotes that, when bound by specific proteins or transcription factors, enhance the transcription of an associated gene.

On the other hand, operon is a regulatory unit of DNA containing a cluster of genes in prokaryotes.

The promoter of operon is the site where RNA polymerase binds. The operator acts as on-off switch to control transcription. The structural genes code for enzymes involved in metabolic Pathway.

Discussion

476.	Which part of poppy plant is used to obtain the drug "Smack" ?(1) Flowers(2) Latex(3) Roots(4) Leaves
Answer» The correct option is(2) Latex Explanation: The latex of poppy plant Papaver somniferum is used to obtain 'Smack' It is a white crystalline, odorless, bitter compound. It acts as a depressant and slows down the body Iurrctions.

476.

Which part of poppy plant is used to obtain the drug "Smack" ?(1) Flowers(2) Latex(3) Roots(4) Leaves

Answer»

The correct option is(2) Latex

Explanation:

The latex of poppy plant Papaver somniferum is used to obtain 'Smack' It is a white crystalline, odorless, bitter compound. It acts as a depressant and slows down the body Iurrctions.

Discussion

477.	Natality refers to(1) Death rate(2) Birth rate(3) Number of individuals leaving the habitat(4) Number of individuals entering a habital
Answer» The correct option is(2) Birth rate Explanation: Natality is birth rate. It refers to the number of births during a given period in the population that are added to the initial density. Death rate is termed as mortality. It refers to the number of deaths in the population during a given period. Immigration is the number of individuals of the same species that have come into the habitat, on the other hand, emigration is the number of individuals of the population who left the habitat.

477.

Natality refers to(1) Death rate(2) Birth rate(3) Number of individuals leaving the habitat(4) Number of individuals entering a habital

Answer»

The correct option is(2) Birth rate

Explanation:

Natality is birth rate. It refers to the number of births during a given period in the population that are added to the initial density.

Death rate is termed as mortality. It refers to the number of deaths in the population during a given period. Immigration is the number of individuals of the same species that have come into the habitat, on the other hand, emigration is the number of individuals of the population who left the habitat.

Discussion

478.	Most of the organic compounds are generally used in the formation of drugs. 1.1% solution of phenol is used as (a) antiseptic (b) antipyretic (c) disinfectant (d) tranquilizer
Answer» Correct Option (c) disinfectant Explanation : 0.2% of phenol solution is used as antiseptic while 1% phenol solution is used as disinfectant.

478.

Most of the organic compounds are generally used in the formation of drugs. 1.1% solution of phenol is used as (a) antiseptic (b) antipyretic (c) disinfectant (d) tranquilizer

Answer»

Correct Option (c) disinfectant

Explanation :

0.2% of phenol solution is used as antiseptic while 1% phenol solution is used as disinfectant.

Discussion

479.	A charged particle is moving in a uniform magnetic field, then(a) both momentum and total energy will change(b) its momentum changes but total energy remains the same(c) its total energy changes but momentum remains the same(d) both momentum and total energy remain the same
Answer» Answer is : (b) its momentum changes but total energy remains the same Charged particle moves on circular path in magnetic field with uniform speed. Force on charged particle is always perpendicular to speed, hence work done is zero. Due to change in velocity of particle on circular path, momentum changes.

479.

A charged particle is moving in a uniform magnetic field, then(a) both momentum and total energy will change(b) its momentum changes but total energy remains the same(c) its total energy changes but momentum remains the same(d) both momentum and total energy remain the same

Answer»

Answer is : (b) its momentum changes but total energy remains the same

Charged particle moves on circular path in magnetic field with uniform speed. Force on charged particle is always perpendicular to speed, hence work done is zero.

Due to change in velocity of particle on circular path, momentum changes.

Discussion

480.	The power factor of the circuit shown in the figure is(a) 0.2(b) 0.8(c) 0.4(d) 0.6
Answer» Answer is : (d) 0.6 R = 40+20 = 60 Ω Power factor = \(\frac{R}{\sqrt{R^2+(X_L-X_C)^2}}\) \(=\frac{60}{\sqrt{60^2+(100-20)^2}}\) = 0.6

480.

The power factor of the circuit shown in the figure is(a) 0.2(b) 0.8(c) 0.4(d) 0.6

Answer»

Answer is : (d) 0.6

R = 40+20 = 60 Ω

Power factor = \(\frac{R}{\sqrt{R^2+(X_L-X_C)^2}}\)

\(=\frac{60}{\sqrt{60^2+(100-20)^2}}\) = 0.6

Discussion

481.	The electromagnetic radiat ions use for veiwing objects through haze and fog is :-(a) Infrared rays (b) γ - r a y s(c) UV rays (d) X - r a y s
Answer» Correct Option (a) Infrared rays

Discussion

482.	Spliceosomes are not found in cells of;(1) Fungi(2) Animals(3) Bacteria(4) Plants
Answer» The correct answer is (3) In eukaryotes spliceosomes are used in removal of introns during posttranscriptional processing of hnRNA. They are absent in prokaryotes.

482.

Spliceosomes are not found in cells of;(1) Fungi(2) Animals(3) Bacteria(4) Plants

Answer»

The correct answer is (3)

In eukaryotes spliceosomes are used in removal of introns during posttranscriptional processing of hnRNA. They are absent in prokaryotes.

Discussion

483.	Double fertilization is exhibited by :(1) Algae(2) Fungi(3) Angiosperms(4) Gymnosperms
Answer» The correct answer is (3) Double fertilization is a unique feature exhibited only by angiosperms. It involves both syngamy and triple fusion.

483.

Double fertilization is exhibited by :(1) Algae(2) Fungi(3) Angiosperms(4) Gymnosperms

Answer»

The correct answer is (3)

Double fertilization is a unique feature exhibited only by angiosperms. It involves both syngamy and triple fusion.

Discussion

484.	The morphological nature of the edible part of coconut is:(1) Cotyledon(2) Endosperm(3) Pericarp(4) Perisperm
Answer» The correct answer is (2) The edible part of coconut is its endosperm. Coconut has double endosperm, liquid endosperm and cellular.

484.

The morphological nature of the edible part of coconut is:(1) Cotyledon(2) Endosperm(3) Pericarp(4) Perisperm

Answer»

The correct answer is (2)

The edible part of coconut is its endosperm. Coconut has double endosperm, liquid endosperm and cellular.

Discussion

485.	In case of poriferans, the spongocoel is lined with flagellated cells called:(1) oscula(2) choanocytes(3) mesenchymal cells(4) ostia
Answer» The correct answer is (2) In poriferans (sponges) choanocytes (collar cells) form lining of spongocoel . Flagella present in collar cells provide circulation to water in water canal system.

485.

In case of poriferans, the spongocoel is lined with flagellated cells called:(1) oscula(2) choanocytes(3) mesenchymal cells(4) ostia

Answer»

The correct answer is (2)

In poriferans (sponges) choanocytes (collar cells) form lining of spongocoel . Flagella present in collar cells provide circulation to water in water canal system.

Discussion

486.	Select the mismatch(1) Cycas – Dioecious(2) Salvinia – Heterosporous(3) Equisetum – Homosporous(4) Pinus – Dioecious
Answer» The correct answer is (4) Pinus is monoecious plant comprising of both male and female cones on same plant.

486.

Select the mismatch(1) Cycas – Dioecious(2) Salvinia – Heterosporous(3) Equisetum – Homosporous(4) Pinus – Dioecious

Answer»

The correct answer is (4)

Pinus is monoecious plant comprising of both male and female cones on same plant.

Discussion

487.	Which one of the following statements is not valid for aerosols ?(1) They alter rainfall and monsoon patterns(2) They cause increased agricultural productivity(3) They have negative impact on agricultural land(4) They are harmful to human health
Answer» The correct answer is (2) Aerosols through its direct or indirect effects on plants can cause various problems in agriculture. However, continuous increase in air pollution may represent a threat to agriculture in the future that is persistent and largely irreversible.

487.

Which one of the following statements is not valid for aerosols ?(1) They alter rainfall and monsoon patterns(2) They cause increased agricultural productivity(3) They have negative impact on agricultural land(4) They are harmful to human health

Answer»

The correct answer is (2)

Aerosols through its direct or indirect effects on plants can cause various problems in agriculture. However, continuous increase in air pollution may represent a threat to agriculture in the future that is persistent and largely irreversible.

Discussion

488.	A baby boy aged two years is admitted to play school and passes through a dental check - up. The dentist observed that the boy had twenty teeth. Which teeth were absent?(1) Canines(2) Pre-molars(3) Molars(4) Incisors
Answer» The correct answer is (2) Total number of teeth in a human child is 20. In primary dentition premolars are absent.

488.

A baby boy aged two years is admitted to play school and passes through a dental check - up. The dentist observed that the boy had twenty teeth. Which teeth were absent?(1) Canines(2) Pre-molars(3) Molars(4) Incisors

Answer»

The correct answer is (2)

Total number of teeth in a human child is 20. In primary dentition premolars are absent.

Discussion

489.	Match the following columns :Column I (classes of Enzymes)Column II (Examples)A. Transferases 1. histadine decarboxylasesB. Lyases2. AmylaseC. Hydrolysis3. Glutamate pyruvate transaminaseD. Ligases4. Pyruvate carboxylaseABCD(a)4231(b)3124(c)1234(d)4132
Answer» Correct Option (d)

Discussion

490.	Which of the following enzyme is called regulatory enzyme of glycolysis ? (a) Phosphoglucoisomerase (b) Phosphofructokinase (c) Phosphotriose isomerase (d) Mutase
Answer» Correct Option (b) Phosphofructokinase

Discussion

491.	A individual has low blood potassium and hypertension. Blood investigations show that has blood aldosterone is very high. He might be suffering from : (a) Addison's disease (b) cretinism (c) gigantism (d) Conn's disease
Answer» Correct Option (d) Conn's disease

Discussion

492.	Match the following columnsColumn IColumn IIA. Adpression1. Chdcalcified remains of plant tissueB. Fusain2. Most commonly found plant fossilsC. petrifactions3. Provide find detailsD. Moulds and costs4. Pith casts is it subset ABCD(a)2314(b)1432(c)4213(d)2134
Answer» Correct Option (d)

492.

Match the following columnsColumn IColumn IIA. Adpression1. Chdcalcified remains of plant tissueB. Fusain2. Most commonly found plant fossilsC. petrifactions3. Provide find detailsD. Moulds and costs4. Pith casts is it subset ABCD(a)2314(b)1432(c)4213(d)2134

Answer»

Correct Option (d)

Discussion

493.	Which of the following statement(s) is/are true : I. Salivary gland chromosomes or polytene chromososome have been seen in diperan insects II. Lampbrush chromosomes have been observed in primary oocyte nuclei of vertebrate only III. Lampbrush chromsomes have been observed in primary oocyte nuclei of vertebrates as well as inventebrates. IV. Kinetochore is an another name for satellites chromosomes. (a) I and IV (b) I, II, III and IV (c) II and III (d) I and III
Answer» Correct Option (c) II and III

Discussion

494.	Prepration of Fallopian tube for conveying developing embryo to uterus is aided by which of the following homona : (a) Human placental lactogen (b) oxytocin (c) progesterone (d) prolactin
Answer» Correct Option (c) progesterone

494.

Prepration of Fallopian tube for conveying developing embryo to uterus is aided by which of the following homona : (a) Human placental lactogen (b) oxytocin (c) progesterone (d) prolactin

Answer»

Correct Option (c) progesterone

Discussion

495.	Which of the following are desirable properties for an ideal DNA markers ? I. Highly polymorphic nature II. Codominant inheritance III. Frequent occurrence in genome IV. High reproducibility (a) I and IV (b) II and III (c) I, II, III and IV (d) I and III
Answer» Correct Option (c) I, II, III and IV

495.

Which of the following are desirable properties for an ideal DNA markers ? I. Highly polymorphic nature II. Codominant inheritance III. Frequent occurrence in genome IV. High reproducibility (a) I and IV (b) II and III (c) I, II, III and IV (d) I and III

Answer»

Correct Option (c) I, II, III and IV

Discussion

496.	Identify the correct sequence of gene in an operon(a) Promoter, operator, regulator, structural (b) Structural, regulator, operator, promoter (c) Regulator, promoter, operator, structural (d) Operator, structural, regulator, promoter
Answer» Correct Option (c) Regulator, promoter, operator, structural

Discussion

497.	Crown of the following is not an autotrphic microbe that fix atmospheric nitrogen ?(a) virus (b) bacteria(c) fungi (d) protozoans
Answer» Correct Option (a) virus

497.

Crown of the following is not an autotrphic microbe that fix atmospheric nitrogen ?(a) virus (b) bacteria(c) fungi (d) protozoans

Answer»

Correct Option (a) virus

Discussion

498.	Select the correct statement from the given options regarding homologous organs : (a) Similar in origin but dissimilar in functions (b) Similar in origin with similar/dissimilar function (c) Dissimilar in origin and dissimilar in structures (d) Similar in origin but dissimilar in functions
Answer» Correct Option (b) Similar in origin with similar/dissimilar function

498.

Select the correct statement from the given options regarding homologous organs : (a) Similar in origin but dissimilar in functions (b) Similar in origin with similar/dissimilar function (c) Dissimilar in origin and dissimilar in structures (d) Similar in origin but dissimilar in functions

Answer»

Correct Option (b) Similar in origin with similar/dissimilar function

Discussion

499.	Which of the following is not an autotrophic microbe that fix atmospheric nitrogen ? (a) Anabaena (b) Rhizobium (c) Nostoc (d) Oscillatoria
Answer» Correct Option (b) Rhizobium

499.

Which of the following is not an autotrophic microbe that fix atmospheric nitrogen ? (a) Anabaena (b) Rhizobium (c) Nostoc (d) Oscillatoria

Answer»

Correct Option (b) Rhizobium

Discussion

500.	Which is not used for detection of cancer of internal organs ? (a) Radiography (b) Computed tomography (c) Magnetic resonance imaging (d) Enzyme linked immunosorbent assay
Answer» Correct Option (d) Enzyme linked immunosorbent assay

Discussion

Explore topic-wise InterviewSolutions in .

During "gene cloning" which is called "gene taxi" :–(a) Vaccine (b) Plasmid(c) Bacterium (d) Protozoa

Chiasmata are formed during meiosis :–(a) before metaphase –I(b) after metaphase –I(c) during prophase –II(d) during metaphase –II

In man, sperms contain autosomes and :–(a) both X and Y chromosomes(b) only Y chromosome(c) either X or Y chromosome(d) only X chromosomes

Mcirosporogenesis is the :–(a) Development of megaspore(b) Development of pollen grain(c) Development of male gametophyte(d) Development of female gametophyte

The yeast commonly known as baker's yeast is :– [a] Saccharomyces cerevisiae [b] Saccharomyces ludwigii [c] Saccharomyces octosporus [d] Schizosaccharomyces

How many ATPs are in all generated in respiration :–(a) 36 (b) 38(c) 12 (d) 4

An in situ method of conservation is :–[a] botanical garden [b] national park[c] genetic engineering [d] cryopreservation

Pneumatophores occur in(1) Halophytes(2) Free-floating hydrophytes(3) Carnivorous plants(4) Submerged hydrophytes

Two balls of masses M1 and M2 are placed on horizontal frictionless table connected by a spring as shown in figure, how mass M2 is pulled to the right with a force F ? If the acceleration of mass M1 is a, then acceleration of mass M2 will be(a) F/M1(b) F-M1a/M2(c) F/M2(d) None of these

Two chromatin fibre per chromosome is present in(a) G1 (b) G2 (c) S (d) Telophase

Which of the following is incorrect about eutrophication ? (a) Found in all ecosystems (b) Leads to organic loading (c) Bloom formatino is eutrophic water (d) Enrichment with plant nutrients

Clotting is a process via which flow of blood from the wound stops naturally. A step of clotting is given belows identify the correct catalyst Fibrinogen → Fibrin (a) prothrombium (b) thrombium (c) thrombin (d) thromboplastin

Steps of relaxation are : I. Discharge of neuron II. Relase of Ca+2 from troponin III. Generation of end plate potential IV. Cessatino of interaction between actin and myosin. (a) I, II, III and IV (b) II and IV (c) I, II and III (d) I, III and IV

Genetically modified foods contain : (a) same number of genes as conventional crop (b) Same number of genes as hybrid crop (c) one of two additional genes (d) hundreds of additional genes

Which of the following statements is correct for Cromagnon man ? (a) Advanced stage of man's evolution than Homo erectus (b) Predecessor of Homo neanderthalensis (c) Direct ancestor of man (d) Lived during last ice age

During photorespiration, the conversion of phosphoglycolate to glycolate takes place in which cell organelle : (a) Mitochondria (b) Peroxisome (c) Chloroplast (d) Glyoxysome

Secondary xylem and phloem in dicot stem are produced by(1) Apical meristems(2) Vascular cambium(3) Phellogen(4) Axillary meristems

The transparent lens in the human eye is held in its place by(1) ligaments attached to the ciliary body(2) ligaments attached to the iris(3) smooth muscles attached to the iris(4) smooth muscles attached to the ciliary body

Which of the following organisms are known as chief producers in the oceans ?(1) Dinoflagellates(2) Diatoms(3) Cyanobacteria(4) Euglenoids

All of the following are part of an operon except :-(1) an operator(2) structural genes(3) an enhancer(4) a promoterAll of the following are part of an operon except :-(1) an operator(2) structural genes(3) an enhancer(4) a promoter

Which part of poppy plant is used to obtain the drug "Smack" ?(1) Flowers(2) Latex(3) Roots(4) Leaves

Natality refers to(1) Death rate(2) Birth rate(3) Number of individuals leaving the habitat(4) Number of individuals entering a habital

Most of the organic compounds are generally used in the formation of drugs. 1.1% solution of phenol is used as (a) antiseptic (b) antipyretic (c) disinfectant (d) tranquilizer

A charged particle is moving in a uniform magnetic field, then(a) both momentum and total energy will change(b) its momentum changes but total energy remains the same(c) its total energy changes but momentum remains the same(d) both momentum and total energy remain the same

The power factor of the circuit shown in the figure is(a) 0.2(b) 0.8(c) 0.4(d) 0.6

The electromagnetic radiat ions use for veiwing objects through haze and fog is :-(a) Infrared rays (b) γ - r a y s(c) UV rays (d) X - r a y s

Spliceosomes are not found in cells of;(1) Fungi(2) Animals(3) Bacteria(4) Plants

Double fertilization is exhibited by :(1) Algae(2) Fungi(3) Angiosperms(4) Gymnosperms

The morphological nature of the edible part of coconut is:(1) Cotyledon(2) Endosperm(3) Pericarp(4) Perisperm

In case of poriferans, the spongocoel is lined with flagellated cells called:(1) oscula(2) choanocytes(3) mesenchymal cells(4) ostia

Select the mismatch(1) Cycas – Dioecious(2) Salvinia – Heterosporous(3) Equisetum – Homosporous(4) Pinus – Dioecious

Which one of the following statements is not valid for aerosols ?(1) They alter rainfall and monsoon patterns(2) They cause increased agricultural productivity(3) They have negative impact on agricultural land(4) They are harmful to human health

A baby boy aged two years is admitted to play school and passes through a dental check - up. The dentist observed that the boy had twenty teeth. Which teeth were absent?(1) Canines(2) Pre-molars(3) Molars(4) Incisors

Match the following columns :Column I (classes of Enzymes)Column II (Examples)A. Transferases 1. histadine decarboxylasesB. Lyases2. AmylaseC. Hydrolysis3. Glutamate pyruvate transaminaseD. Ligases4. Pyruvate carboxylaseABCD(a)4231(b)3124(c)1234(d)4132

Which of the following enzyme is called regulatory enzyme of glycolysis ? (a) Phosphoglucoisomerase (b) Phosphofructokinase (c) Phosphotriose isomerase (d) Mutase

A individual has low blood potassium and hypertension. Blood investigations show that has blood aldosterone is very high. He might be suffering from : (a) Addison's disease (b) cretinism (c) gigantism (d) Conn's disease

Match the following columnsColumn IColumn IIA. Adpression1. Chdcalcified remains of plant tissueB. Fusain2. Most commonly found plant fossilsC. petrifactions3. Provide find detailsD. Moulds and costs4. Pith casts is it subset ABCD(a)2314(b)1432(c)4213(d)2134

Prepration of Fallopian tube for conveying developing embryo to uterus is aided by which of the following homona : (a) Human placental lactogen (b) oxytocin (c) progesterone (d) prolactin

Which of the following are desirable properties for an ideal DNA markers ? I. Highly polymorphic nature II. Codominant inheritance III. Frequent occurrence in genome IV. High reproducibility (a) I and IV (b) II and III (c) I, II, III and IV (d) I and III

Identify the correct sequence of gene in an operon(a) Promoter, operator, regulator, structural (b) Structural, regulator, operator, promoter (c) Regulator, promoter, operator, structural (d) Operator, structural, regulator, promoter

Crown of the following is not an autotrphic microbe that fix atmospheric nitrogen ?(a) virus (b) bacteria(c) fungi (d) protozoans

Select the correct statement from the given options regarding homologous organs : (a) Similar in origin but dissimilar in functions (b) Similar in origin with similar/dissimilar function (c) Dissimilar in origin and dissimilar in structures (d) Similar in origin but dissimilar in functions

Which of the following is not an autotrophic microbe that fix atmospheric nitrogen ? (a) Anabaena (b) Rhizobium (c) Nostoc (d) Oscillatoria

Which is not used for detection of cancer of internal organs ? (a) Radiography (b) Computed tomography (c) Magnetic resonance imaging (d) Enzyme linked immunosorbent assay