24277 + Interview Questions in Biology in Class 12 Page 138 InterviewSolution

6851.	Question : The chromosome number of oninon is 16 (2n).Find the chromosome number in the following cells with reasons.Endosperm
Answer» ANSWER :B::D

Discussion

6852.	Question : The chromosome movement during meiosis had been worked out by the year.
Answer» 1865 1900 1902 1891 Solution :The CHROMOSOME MOVEMENT during MEIOSIS had been WORKED out by the YEAR 1902.

Discussion

6853.	Question : The chromosome number of a spore mother cell of an angiosperm is 38. What will be chromosome number of its endosperm cell?
Answer» 38 19 57 76 Answer :C

Discussion

6854.	Question : The chromosome number of meiocyte is 46. What will be the chromosome number of sperms? n=46 n=23 2n=46 3n=69
Answer» n=46 n=23 2n=46 3n=69 Answer :B

Discussion

6855.	Question : The chromosome number in meiocyte of an adders tongue fern is
Answer» 380 630 660 1260 Answer :D

Discussion

6856.	Question : The chromosome maps are not accurate maps because
Answer» CROSSING over frequency is HIGHER than RECOMBINATION frequency One crossing over INTERFERES and increasesthe frequency of nearby crossing over Crossing over frequency decreases towards the ends of chromosome Heterochromation INCREASES crossing over Answer :A

Discussion

6857.	Question : The chromosomal condition 2n - 2 represents ...........
Answer» a) Monosomy B) Nullisomy C) TRISOMY d) TETRASOMY Answer :B

Discussion

6858.	Question : the chromosome complement of honey bees develop parthenogenetically from unfertilized ova is
Answer» haploid diploid triploid polyploid ANSWER :A

Discussion

6859.	Question : The chromosome associated with sex determination is known as
Answer» autosomes accessory chromosomes super numenary determinant CHROMOSOME

Discussion

6860.	Question : The chromatography used to separate substances that can be vapourised is____
Answer» GAS chromatography paper chromatography gel FILTRATION chromatography thinlayer chromatography Answer :A

Discussion

6861.	Question : The chromosome number in the melocyte of housefly is 12 and that of its gamete is 6. Write the reason for the change in chromosome number of meiocycle and gamete.
Answer» SOLUTION :Malocyte is diploid cell undergo reduction DIVISION to from HAPLOID GAMETES.

Discussion

6862.	Question : The chroinosome with large number of genes known
Answer» `3^(rd)` `2^(ND)` `1^(st)` X-chrosome Answer :C

Discussion

6863.	Question : the choice of Bt-toxin genes depends upon(A) type of crop(B) types of targeted pest(C) type of vector(D) both (A) and (B)
Answer» TYPE of the crop type of the TARGETED PEST the type of VECTOR both a and B Solution :both a and b

Discussion

6864.	Question : The chief pollinator of our agri - horticultural crops are….(A) moths(B) bees(C) beetles(D) butterflies
Answer» moths bees beetles butterflies Answer :B

Discussion

6865.	Question : The chief edible part in A groundnut B jack fruit C apple and D mango fuits are
Answer» Endosperm InfloerscenceMesocarpEndocarp Cotyledons SUCCULENT perianth FLESHY THALAMUS Mesocarp Answer :B

Discussion

6866.	Question : The chemical test that is used for diagnosis of typhoid
Answer» ELISA-Test ESR-Test PCR-Test Widal-Test Answer :D

Discussion

6867.	Question : The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because
Answer» a proton GRADIENT forms ACROSS the INNER mitochondrial membrane there is a change in the permeability of the inner mitochondiral membrane towards adenosine diphosphate (ADP) high energy bonds are FORMED in mitochondrial proteins ADP is pumped out of the matrix into the INTERMEMBRANE space Answer :A

Discussion

6868.	Question : The chemical substance released by activated spermatozoa that acts on the ground substances of the follicle cells is known as
Answer» progesterone hyaluronidase relaxin gonadotropin Answer :B

Discussion

6869.	Question : The chemical substance _____ released from platelets helps in vasoconstriction to check the bloodflow in place of injury.
Answer» ANSWER :SEROTONIN

Discussion

6870.	Question : The chemical structure of chlorophyll 'a' varies from chlorophyll 'b' due to difference between
Answer» `CH_(3)`and `C_(2)H_(5)` `CH_(3)`and `CH=CH_(2)` `CH_(3)` and CHO CHO and `CHCH_(2)` Answer :B

Discussion

6871.	Question :The chemical substance secreted from moss archegonium is rich in________.
Answer» ANSWER :SUGARS

Discussion

6872.	Question : The chemical nature of the compound forming exine is…. (A) long chain fattyacids (B) phenolics (C) carotenoids (D) all of these
Answer» LONG CHAIN fattyacids phenolics carotenoids all of these Answer :D

Discussion

6873.	Question : The chemical knives of DNA are
Answer» LIGASES endonucleases transcriptase POLYMERASES ANSWER :B

Discussion

6874.	Question : The chemical bond between oxygen and haemoglobin is
Answer» STABLE and reversible Unstable and reversible Stable and irreversible Unstable and irreversible Answer :B

Discussion

6875.	Question : The chemical compound whose
Answer» Papaver somniferum ERYTHROXYLUM coca Atropa belladona CANNABIS sativa Solution :The GIVEN figure is of morphine which is EXTRACTED from the letex of POPPY plant, Papaver somniferum.

Discussion

6876.	Question : The checker board used in genetic crosses is called______.
Answer» ANSWER :INCOMPLETE DOMINANCE

Discussion

6877.	Question : The characters that are expressed in the first generation are called
Answer» DOMINANT characters RECESSIVE characters Both recessive and BLEND characters None of the above Answer :A

Discussion

6878.	Question : The characteristics of a molecular probe are I. Very long molecule II. Double-stranded III. DNA or RNA IV. Complementary to a part of desired gene The correct pair is
Answer» I,II II,III III,IV IV,I Answer :C

Discussion

6879.	Question : The characteristics fruit of the family Gramineae is
Answer» SILIQUA CARYOPSIS ACHENE Pod Answer :1

Discussion

6880.	Question : The characteristic feature of a child with cri-du-chat syndrome is
Answer» microphthalmia defective larynx cleft palate enlarged head Answer :B

Discussion

6881.	Question : The character which predominates and clearly seen in F_1 generation is
Answer» Intermediate Incomplete Recessive Dominant Answer :D

Discussion

6882.	Question : The character which can express only in homozygous condition in case of garden pea is- (A) Constricted pod (B) Green seed colour (C) Axial flower (D) Yellow pod
Answer» A, B & D A, C & D B, C & D A, B & C Answer :A

Discussion

6883.	Question : The character which appears in F_1 generation is called
Answer» recessive DOMINANT latent none of these Solution :dominant

Discussion

6884.	Question : The character that proves that frogs have evolved from fishes is
Answer» their ABILITY to swim in water tadpole LARVA in frogs similarity in the SHAPE of the lead their feeding on aquatic plants Answer :B

Discussion

6885.	Question : The change of the genetic materials is called_____.
Answer» ANSWER :MUTATION

Discussion

6886.	Question : The change in the virulence of Diplococcus is called …………. .
Answer» transduction transcription translation transformation Answer :D

Discussion

6887.	Question : The change in population size at a given time interval t, is given by the expression Nt = No+ B + I - D - E I, B and D stand respectively for
Answer» RATE of IMMIGRATION, MORTALITY rate, NATALITY rate Rate of immigration, natality rate, rate of emigration Mortality rate, natality rate, rate of immigration Rate of immigration, natality rate, mortality rate Answer :D

Discussion

6888.	Question : The change in population size at a given time interval t, is given by the expression N_1 = N_0 + B+ I - D -E,I,B and D stand respectively for:
Answer» RATE of IMMIGRATION, MORTALITY rate, NATALITY rate rate of EMIGRATION, natality rate, mortality rate mortality rate, natality rate, rate of immigration rate of immigration, natality rate, mortality rate Answer :D

Discussion

6889.	Question : The formulaof growthfor populationin a giventime is
Answer» a. Rate ofimmigration mortalitynatality rate. B. Rateof EMIGRATION natalityrate mortalityrate C. Mortalityrate natalityrate rate ofimmigration d. Mortalityrate rateof immigrationnatalityrate ANSWER :e

Discussion

6890.	Question : The change in gene frequency occurred in small population by chance is called as:
Answer» Mutation Genetic drift Gene migration Gene flow Answer :B

Discussion

6891.	Question : The chances of contacting bird flu from a properly cooked (above 100°C) chicken and egg are
Answer» Very HIGH High Moderate None Solution :Properly cooked (above `100^@C`) chicken and egg have no chances of contacting BIRD FLU. As high temperature kills VIRUSES.

Discussion

6892.	Question : The cervical vertebrae in humans is
Answer» Same as in WHALE More than that is RABBIT DOUBLE that that of Horse LESS than that in Giraffe. Answer :A

Discussion

6893.	Question :The cerebrum wrap around a structure called __A__. Which is major coordinating centre for__B___ signaling. Another very important part of the brain called ___C___ lie at the base of thalamus.Choose the correct option for A, B and C to complete the given statement
Answer» 1 2 3 4 Answer :C

Discussion

6894.	Question : The centromere is found on the proximal end in____chromosome.
Answer» SOLUTION :TELOCENTRIC

Discussion

6895.	Question : The centres that regulate respiratory rhythm are located in:
Answer» CEREBRUM and cerebellum PONS and midbrain Midbrain and medulla Medulla and pons ANSWER :D

Discussion

6896.	Question : The centromere is found at the centre of the ________ chromsome.
Answer» SOLUTION :METACENTRIC

Discussion

6897.	Question : The centre of the primary follicle is occupied by
Answer» FOLLICULAR cells oogonium theca interna NONE of the above Answer :B

Discussion

6898.	Question : The Central Drug Research Institute (CDRI) is situated in:
Answer» NEW Delhi Allahabad Lucknow Kanpur Answer :C

Discussion

6899.	Question : The absence of chlorophyll, in the lowermost cell of Ulothrix, shows
Answer» FUNCTIONAL fission tissue formation cell characteristic beginning of labour division Solution :(d) Ulothrix in an advanced alga, with THREE TYPES of cells - GREEN dome-shaped apical cell, green intercalary cell and basal non-green cell called holdfast.Holdfast or basal cell is for attachment, it has NUCLEUS and cytoplasm, itspresence shows the beginning of division of labour.

Discussion

6900.	Question : The abundance of a species in a population, within is habitat, is called:
Answer» NICHE density absolute density relative density regional density Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : The chromosome number of oninon is 16 (2n).Find the chromosome number in the following cells with reasons.Endosperm

Question : The chromosome movement during meiosis had been worked out by the year.

Question : The chromosome number of a spore mother cell of an angiosperm is 38. What will be chromosome number of its endosperm cell?

Question : The chromosome number of meiocyte is 46. What will be the chromosome number of sperms? n=46 n=23 2n=46 3n=69

Question : The chromosome number in meiocyte of an adders tongue fern is

Question : The chromosome maps are not accurate maps because

Question : The chromosomal condition 2n - 2 represents ...........

Question : the chromosome complement of honey bees develop parthenogenetically from unfertilized ova is

Question : The chromosome associated with sex determination is known as

Question : The chromatography used to separate substances that can be vapourised is____

Question : The chromosome number in the melocyte of housefly is 12 and that of its gamete is 6. Write the reason for the change in chromosome number of meiocycle and gamete.

Question : The chroinosome with large number of genes known

Question : the choice of Bt-toxin genes depends upon(A) type of crop(B) types of targeted pest(C) type of vector(D) both (A) and (B)

Question : The chief pollinator of our agri - horticultural crops are….(A) moths(B) bees(C) beetles(D) butterflies

Question : The chief edible part in A groundnut B jack fruit C apple and D mango fuits are

Question : The chemical test that is used for diagnosis of typhoid

Question : The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because

Question : The chemical substance released by activated spermatozoa that acts on the ground substances of the follicle cells is known as

Question : The chemical substance _____ released from platelets helps in vasoconstriction to check the bloodflow in place of injury.

Question : The chemical structure of chlorophyll 'a' varies from chlorophyll 'b' due to difference between

Question :The chemical substance secreted from moss archegonium is rich in________.

Question : The chemical nature of the compound forming exine is…. (A) long chain fattyacids (B) phenolics (C) carotenoids (D) all of these

Question : The chemical knives of DNA are

Question : The chemical bond between oxygen and haemoglobin is

Question : The chemical compound whose

Question : The checker board used in genetic crosses is called______.

Question : The characters that are expressed in the first generation are called

Question : The characteristics of a molecular probe are I. Very long molecule II. Double-stranded III. DNA or RNA IV. Complementary to a part of desired gene The correct pair is

Question : The characteristics fruit of the family Gramineae is

Question : The characteristic feature of a child with cri-du-chat syndrome is

Question : The character which predominates and clearly seen in F_1 generation is

Question : The character which can express only in homozygous condition in case of garden pea is- (A) Constricted pod (B) Green seed colour (C) Axial flower (D) Yellow pod

Question : The character which appears in F_1 generation is called

Question : The character that proves that frogs have evolved from fishes is

Question : The change of the genetic materials is called_____.

Question : The change in the virulence of Diplococcus is called …………. .

Question : The change in population size at a given time interval t, is given by the expression Nt = No+ B + I - D - E I, B and D stand respectively for

Question : The change in population size at a given time interval t, is given by the expression N_1 = N_0 + B+ I - D -E,I,B and D stand respectively for:

Question : The formulaof growthfor populationin a giventime is

Question : The change in gene frequency occurred in small population by chance is called as:

Question : The chances of contacting bird flu from a properly cooked (above 100°C) chicken and egg are

Question : The cervical vertebrae in humans is

Question :The cerebrum wrap around a structure called __A__. Which is major coordinating centre for__B___ signaling. Another very important part of the brain called ___C___ lie at the base of thalamus.Choose the correct option for A, B and C to complete the given statement

Question : The centromere is found on the proximal end in____chromosome.

Question : The centres that regulate respiratory rhythm are located in:

Question : The centromere is found at the centre of the ________ chromsome.

Question : The centre of the primary follicle is occupied by

Question : The Central Drug Research Institute (CDRI) is situated in:

Question : The absence of chlorophyll, in the lowermost cell of Ulothrix, shows

Question : The abundance of a species in a population, within is habitat, is called:

Question :The cerebrum wrap around a structure called A. Which is major coordinating centre forB_ signaling. Another very important part of the brain called _C_ lie at the base of thalamus.Choose the correct option for A, B and C to complete the given statement