24277 + Interview Questions in Biology in Class 12 Page 412 InterviewSolution

20551.	Question : Besides tube nucleus, the pollen tube at the time of the entry of embryosac has
Answer» SINGLE gametic cell two gametic cells three gametic cell four gametic cell Answer :B

Discussion

20552.	Question : Besides their utility as simple fules , fossil fuels also give rise to by - products such as :
Answer» CERTAIN SYNTHETIC chemicals Drugs Plastic All of above ANSWER :D

Discussion

20553.	Question :Besides the ————————, the eukaryotic cells have other membrane bound distinct structures called organelles like the endoplasmic reticulum (ER), the golgi complex, lysosomes, mitochondria, microbodies and vacuoles.
Answer» RIBOSOMES NUCLEOLUS NUCLEUS Centrosome Answer :D

Discussion

20554.	Question : Besides paddy fields, cyanobacteria are also found inside vegetative part of
Answer» Pinus Cycas Equisetum Psilotum Solution :(b) Cyanobacteria within the CORALLOID roots of Cycas are chemoheterotrophic and specifically adapted to life in symbiosis.Only a few species of cyanobacteria form ASSOCIATIONS with Cycas. Pinus is a GYMNOSPERM. Equisetum belongs to vascular plants and to horse TAIL family.Psilotum belongs to division-Pteridophyte and is a fern-like plant.

Discussion

20555.	Question : Beside cellulose microfibrils, the other two cell with networks are
Answer» PROTEIN and hemicellulose Hemicellulose and protein Pectic and GLYCOPROTEIN PECTIN and hemicellulose Answer :C

Discussion

20556.	Question : Besides better aeration and mixing property what other advantages do stirred tank bioreactors have over shake flasks?
Answer» Solution :STIRRED tank BIOREACTORS have foUowing advantages over shake flask culture method : (a) CULTURES can be prepared on large scale. (b) Small volumes of cultures can be withdrawn periodically for sampling. (c) Culture medium can be renewed from time to time. (d) Temperature and pH ofculture medium can be maintained. (e) Aeration of culture medium by FOAMING method helps in proper oxygen supply to the growing cells or BACTERIA.

Discussion

20557.	Question : Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors have over shake flasks ?
Answer» Solution :Thestirred tank BIOREACTOR facilitates the MIXING and OXYGEN availability. It controls the temperature and PH inside the bioreactor .

Discussion

20558.	Question : Bescribe Transcription.
Answer» Solution :Transcription is the process of COPYING genetic information from one strand of the DNA into RNA. Also the process of transcription is governed by the principle of complementarity, except the adenosine now forms base pair with uracil instead of thymine. Unlike in replication, which once set in the total DNA of an organism gets duplicated in transcreption only a segment of DNA and only one of the two strands is copied into RNA. Reasons why both the strands are not copied at the same time during transcription : (i) If both the strands are copied, they would code because for RNA molecules with different sequences (because COMPLEMENTARY does not mean identical) and in turn two proteins with different amino acid sequence would be coding for different proteins and the genetic information transfer machinery would become much more complicated. (II) The two RNA molecules produced simultaneously would be complementary to each other and HENCE would bind together to form a double stranded RNA. This WORLD prevent RNA from being translated into protein.

Discussion

20559.	Question : Bent', a dominant sex-linked allele B,in the mouse results in a short, crooked tail. Its recessive allele, b produce normal tails. If a normal tailed femal is mated to a bent- tailed male, what phenotypic ratio should occur in the F1?
Answer» BENT, NORMAL normal, bent bent, bent normal, normal Answer :A

Discussion

20560.	Question : Benthic organisms are affected the most by
Answer» light reacting the forest floor surface TURBULENCE of water sediment characteristics of AQUATIC ecosystems water-holding CAPACITY of soil Answer :C

Discussion

20561.	Question : Benthic animals live
Answer» DEEP in the SEA Floating Submerged ACTIVE SWIMMERS ANSWER :A

Discussion

20562.	Question : Believers of spontaneous generation theory believed that :
Answer» LIFE originated from other SIMILAR organisms or spontaneously Life originated only spontaneously Life originated from similar organisms Life originated from AIR Answer :2

Discussion

20563.	Question : Beneficial mineral element accumulated by some plants is
Answer» Selenium Copper Iron Potassium Answer :A

Discussion

20564.	Question : Bending of shoots towards light is due to:
Answer» phototaxis Increase in auxin and ELONGATION of cells in shaded area More cells DIVIDE on lighted SIDE due to auxin More cells divide on LIGHT side due to GIBBERELLINS Answer :B

Discussion

20565.	Question : Benedicts reagent test is conductedto Confirm the presence of
Answer» POLYSACCHARIDES LIKE starch Lipids Reducing agent Proteins Answer :C

Discussion

20566.	Question : Bell shaped polygonal pyramid indicates,
Answer» High PERCENTAGE of old individual Low percentage of YOUNG individual Moderate percentage of young individual Low percentage of old individual ANSWER :C

Discussion

20567.	Question : Bell-shaped polygonal pyramid indicates :
Answer» MODERATE PERCENTAGE of YOUNG individuals high percentage of young individuals low percentage of young individuals low percentage of OLD individuals Answer :A

Discussion

20568.	Question : Being a tropical country, India is the largest producer of delicious mangoes. These mango tree don't grow in temperate countries. Give reason.
Answer» Solution :Mango TREE show very narrow RANGE of thermal tolerance. Hence they cannot grow in TEMPERATE countries.

Discussion

20569.	Question : Before how many years dinosaurs suddenly disappeared from earth?
Answer» 320 mya 350 mya 200 mya 65 mya Answer :D

Discussion

20570.	Question : How many years ago life originated on earth?
Answer» ANSWER :4.8 BILLION

Discussion

20571.	Question : Being a member of the committee of people planning programme of your panchayath, suggest two common fresh water fishes grown in the fresh water fishery project undertaken by your panchayath
Answer» SOLUTION :CATLA and ROHU

Discussion

20572.	Question : Before disposal, sewage is treated in sewage treatment plants(STPs). It is done by which microbes present naturally in sewage:
Answer» Heterotropic microbes Autotrophic microbes Aerobic bacteria BOTH (A) AND (B) ANSWER :A

Discussion

20573.	Question : Bee.s wax is used in manufacture of ..........
Answer» COSMETICS paints carbon paper all the above Solution :all the above

Discussion

20574.	Question : Bee.s wax is insoluble in ...........
Answer» WATER benzene oil other SOLUTION :water

Discussion

20575.	Question : Bee venom is used to cure
Answer» CYSTITIS arthirits LARYNGITIS BRONCHITIS ANSWER :B

Discussion

20576.	Question : Bee keeping though relatively easy requires some specialized knowledge. What are the important points for successful beekeeping?
Answer» SOLUTION :1. Knowledge of the NATURE and habits of bees. 2. Selection of SUITABLE location for keeping the beehive. 3. Catching and hiving of swarms. 4. Management of beehive during different seasons. 5. HANDLING and collection of honey and bee wax.

Discussion

20577.	Question : Bee keeping requires some specialized knowledge for success What is the alternate name for beekeeping ?
Answer» SOLUTION :APICULTURE

Discussion

20578.	Question : Bee forage or pasturage determines the ______________and __________________of honey.
Answer» ANSWER :QUALITY, TASTE

Discussion

20579.	Question : Because most of the amino acids are represented by more than one codons, the genetic code is said to be :-
Answer» deaminated comma less degenerate overlapping Answer :C

Discussion

20580.	Question : Because of the rigidity of cell wall the cell does not rupture.
Answer» ANSWER :1

Discussion

20581.	Question : Beauveria helps plants by
Answer» ADDING NUTRIENTS to soil fixing nitrogen killing insects mobilizing phosphorous Answer :C

Discussion

20582.	Question : Beat volume is
Answer» 30mL 5L 100mL 70mL Answer :D

Discussion

20583.	Question : Beadle and Tatum induced mutation in Neurospora crassa by
Answer» Y-rays UV-rays X-rays chemical MUTAGEN ANSWER :B

Discussion

20584.	Question : Bead like structures along the length of a chromomema.
Answer» SOLUTION :Chromosmeres

Discussion

20585.	Question : BCG vaccine is used against:
Answer» TB Leprosy Food poisoning None of these Answer :A

Discussion

20586.	Question : Bats belongs to class_______.
Answer» ANSWER :MAMMALIA,

Discussion

20587.	Question : Bateson used the terms coupling and repulsion, while discovering linkage in Lathyrus.If A, B are dominant alleles and a, b are recessive alleles of two genes, parental crosses in coupling and repulsion phases can be written as follows
Answer» Coupling-AABB,aabb, Repulsion-Aabb,aaBB coupling-AABB,aabb.Repulsion-AABB,Aabb coupling-aaBB,aabb,Repulsion-Aabb,aabb Coupling-Aabb,aaBB, Repulsion-AbBa,aabb Answer :A

Discussion

20588.	Question : Bateson and Punnet discovred the phenome-mnon which is exception of Mendel's
Answer» UNIT FACTORS in pairs Dominance and recessive Segregation of unit factors Independent assortment. Answer :D

Discussion

20589.	Question : Basophilic ergastoplasm of gland cells indicates richness of
Answer» Ribosomes Golgi bodies Mitochandria DNA Answer :A

Discussion

20590.	Question : Basmati' rice is indigenous to our country. But now it is under the control of the USA. How it happened so?
Answer» SOLUTION :Basmati. rice is INDIGENOUS to India, but its PATENCY is obtained by the USA. So USA has the right to prevent OTHERS from COMMERCIAL use of Basmati rice.

Discussion

20591.	Question : Basidiospores are borne on the tip of
Answer» mycelium ascocarp flagella aplanospore Answer :A

Discussion

20592.	Question : Basic structure of all Chlorophylls comprises
Answer» Chtochrome SYSTEM Flavoproteins Porphyrin system PLASTOCYANIN ANSWER :C

Discussion

20593.	Question : Basic principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus of
Answer» BODY CELL VEGETATIVE cell Germ cell Somatic cell SOLUTION :Germ cell

Discussion

20594.	Question : Basic principle for developing transgenic plants and animals to introduce the gene of intertest into nucleus of
Answer» BODY CELLS GERM cells Somatic cells Vegetative cells SOLUTION :Germ cells

Discussion

20595.	Question : Based on your understanding of genetic code, explain the formation of any abnormal hemoglobin molecule. What are the known consequences of such a change ?
Answer» Solution :The defect is caused by the substitution (trans VERSION) of Glutamic acid (Glu) by Valine (Val) at the sixth position of the betaglobin chain of the haemoglobin molecule. The substitution of amino acid in the glob in protein results due to the SINGLE BASE substitution at the sixth codon of the betaglobin gene from GAG to GUG. The mutant haemoglobin molecule undergoes polymerisation under low oxygen tension causing the change in the shape of the RBC from BICONCAVE disc to elongated sickle like structure. Sickle-shaped red BLOOD cells that obstruct capillaries and restrict blood flow to an organ resulting in ischaemia, pain, necrosis, and often organ damage.

Discussion

20596.	Question : Basheer a prawasi Malayalee has planteda mango plantnearhisresidencein Saudi Arabia . Hefoundslowtythat it showsadjustmentsto the changedenvirorument. Whatwill youtcall thephenomenon ?
Answer» SOLUTION :Accelimatization

Discussion

20597.	Question : Based on this picture given below, prepare a short note on Eravikulam National Park.
Answer» SOLUTION :ERAVIKULAM NATIONAL PARK

Discussion

20598.	Question : Based on the relative proportion of parental and recombinant phenotypes in the test cross progeny involing two recessive genes r (round) and Y (yellow) controlling the seed shape and seed colour respectively, the observed per cent recombinant is 10. The distance between r and y is
Answer» 10 MAP UNIT 20 map units 30 map units 40 map units Answer :A

Discussion

20599.	Question : Based on the phenomenon represented by the given diagram, choose the correct statement from the following.
Answer» The finches on the Galapagos island PROVE an EVOLUTION due to mutation A rapid decline was observed in the population of finches on the island due to competition among the species. This phenemenon is an EXAMPLE of convergent evolution, which is similarly observed between the Australian marsupials and placental mammals. The original insectivorous finches evolved into seed-eating and vegetarian finches, eventually CHANGING the shape of their beaks according to their food habits. ANSWER :C

Discussion

20600.	Question : Based on the nature of the habitat, what are the types of succession is present?
Answer» SOLUTION :TWO TYPES : HYDRARCH or XERARCH

Discussion

Explore topic-wise InterviewSolutions in .

Question : Besides tube nucleus, the pollen tube at the time of the entry of embryosac has

Question : Besides their utility as simple fules , fossil fuels also give rise to by - products such as :

Question :Besides the ————————, the eukaryotic cells have other membrane bound distinct structures called organelles like the endoplasmic reticulum (ER), the golgi complex, lysosomes, mitochondria, microbodies and vacuoles.

Question : Besides paddy fields, cyanobacteria are also found inside vegetative part of

Question : Beside cellulose microfibrils, the other two cell with networks are

Question : Besides better aeration and mixing property what other advantages do stirred tank bioreactors have over shake flasks?

Question : Besides better aeration and mixing properties, what other advantages do stirred tank bioreactors have over shake flasks ?

Question : Bescribe Transcription.

Question : Bent', a dominant sex-linked allele B,in the mouse results in a short, crooked tail. Its recessive allele, b produce normal tails. If a normal tailed femal is mated to a bent- tailed male, what phenotypic ratio should occur in the F1?

Question : Benthic organisms are affected the most by

Question : Benthic animals live

Question : Believers of spontaneous generation theory believed that :

Question : Beneficial mineral element accumulated by some plants is

Question : Bending of shoots towards light is due to:

Question : Benedicts reagent test is conductedto Confirm the presence of

Question : Bell shaped polygonal pyramid indicates,

Question : Bell-shaped polygonal pyramid indicates :

Question : Being a tropical country, India is the largest producer of delicious mangoes. These mango tree don't grow in temperate countries. Give reason.

Question : Before how many years dinosaurs suddenly disappeared from earth?

Question : How many years ago life originated on earth?

Question : Being a member of the committee of people planning programme of your panchayath, suggest two common fresh water fishes grown in the fresh water fishery project undertaken by your panchayath

Question : Before disposal, sewage is treated in sewage treatment plants(STPs). It is done by which microbes present naturally in sewage:

Question : Bee.s wax is used in manufacture of ..........

Question : Bee.s wax is insoluble in ...........

Question : Bee venom is used to cure

Question : Bee keeping though relatively easy requires some specialized knowledge. What are the important points for successful beekeeping?

Question : Bee keeping requires some specialized knowledge for success What is the alternate name for beekeeping ?

Question : Bee forage or pasturage determines the ______________and __________________of honey.

Question : Because most of the amino acids are represented by more than one codons, the genetic code is said to be :-

Question : Because of the rigidity of cell wall the cell does not rupture.

Question : Beauveria helps plants by

Question : Beat volume is

Question : Beadle and Tatum induced mutation in Neurospora crassa by

Question : Bead like structures along the length of a chromomema.

Question : BCG vaccine is used against:

Question : Bats belongs to class_______.

Question : Bateson used the terms coupling and repulsion, while discovering linkage in Lathyrus.If A, B are dominant alleles and a, b are recessive alleles of two genes, parental crosses in coupling and repulsion phases can be written as follows

Question : Bateson and Punnet discovred the phenome-mnon which is exception of Mendel's

Question : Basophilic ergastoplasm of gland cells indicates richness of

Question : Basmati' rice is indigenous to our country. But now it is under the control of the USA. How it happened so?

Question : Basidiospores are borne on the tip of

Question : Basic structure of all Chlorophylls comprises

Question : Basic principle of developing transgenic plants and animals is to introduce the gene of interest into the nucleus of

Question : Basic principle for developing transgenic plants and animals to introduce the gene of intertest into nucleus of

Question : Based on your understanding of genetic code, explain the formation of any abnormal hemoglobin molecule. What are the known consequences of such a change ?

Question : Basheer a prawasi Malayalee has planteda mango plantnearhisresidencein Saudi Arabia . Hefoundslowtythat it showsadjustmentsto the changedenvirorument. Whatwill youtcall thephenomenon ?

Question : Based on this picture given below, prepare a short note on Eravikulam National Park.

Question : Based on the relative proportion of parental and recombinant phenotypes in the test cross progeny involing two recessive genes r (round) and Y (yellow) controlling the seed shape and seed colour respectively, the observed per cent recombinant is 10. The distance between r and y is

Question : Based on the phenomenon represented by the given diagram, choose the correct statement from the following.

Question : Based on the nature of the habitat, what are the types of succession is present?

Question : Bee forage or pasturage determines the and ____of honey.