24277 + Interview Questions in Biology in Class 12 Page 460 InterviewSolution

22951.	Question : A species-area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas ?
Answer» Solution :ECOLOGISTS have discovered that the value of Z (SLOPE of the line) lies in the range of 0.1 to 0.2, regardless of the taxonomic group or the region (WHETHER it is the plants in Britain, birds in California or molluscs in New York state, the slopes of the regression line are amazingly similar). But, if you analyse the species-area relationships among very large areas like the entire continents, you will find that the slope of the line to be MUCH steeper (Z values in the range of 0.6 to 1.2). For example, for frugivorous (fruit-eating) birds and mammals in the tropical forests of different continents, the slope is found to be 1.15

Discussion

22952.	Question : A special type of facilitated diffusion related to movement of solvents only through living systems is called
Answer» Imbitition Osmosis Plasmolysis Embolism Answer :B

Discussion

22953.	Question : [A]: Some babies have a small tail.[R]: This is just a freak of nature and has no explanation
Answer» If both A and R are true and R is the CORRECT explanation of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false ANSWER :C

Discussion

22954.	Question : A special membranous structure which is formed by the extensions of plasma membrane into the cell, is called as :-
Answer» SLIME layer Capsule Mesosome Plasmid Answer :C

Discussion

22955.	Question : (A]: Somtaomedin secreted by liver is also called IGF.[R]: Somatomedin and somatostatin are syn- onyms.
Answer» If both A and R are TRUE and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :C

Discussion

22956.	Question : A somatic plant cell has potential to develop into a full plant. This is called:
Answer» totipotency gene cloning tissue culture regeneration Answer :A

Discussion

22957.	Question : A solution of Chlorophyll pigments looks red in reflected light because of
Answer» DIFFRACTION FLUORESCENCE REFLECTION Refraction Answer :B

Discussion

22958.	Question : A solution of chlorphyll pigments looks red in reflected light because of
Answer» diffraction fluorescence reflection refraction Answer :A

Discussion

22959.	Question : A solution of 1.0M glucose develops a pressure of -27 bars in an oxmometer. What is notcorrect ?
Answer» PRESSURE POTENTIAL is -27 bars Osmotic pressure in 27 bars Osmotic potential is -27 bars Solute potential is -27 bars Answer :A

Discussion

22960.	Question : A solution is differ from pure water in having –
Answer» <P>LOW `psi_(W)` Low DPD Low `psi_(p)` Low OP Answer :A

Discussion

22961.	Question : A small protein attached to the outer surfce of the inner membrane and which acts as a mobile carrier for transafer of electron between complex III and IV
Answer» Solution :(C)Cytochrome-c is a small protein fouond attached to the outer surface of the INNER membrane and ACTS as a mobile carrier for the TRANSFER of electrons between complex III and IV in electron transport sysmtem(ETS).

Discussion

22962.	Question : A small lobe remains hidden under the lateral cerebral fissure which is known as_____.
Answer» ANSWER :INSULA or GLAND of REIL

Discussion

22963.	Question : A small fragment of skin of a different person was extracted from the nails of a murdered person. This fragment of skin led the crime investigators to the murder.Based on this incident answer the following questions:What is the procedure involved in this technique ?
Answer» SOLUTION :Any four relevant steps-Isolation, Digestion SEPARATION, BLOTTING, HYBRIDISATION, Autoradiography

Discussion

22964.	Question : A small fragment of skin of a different person was extracted from the nails of a murdered person. This fragment of skin led the crime investigators to the murder.Based on this incident answer the following questions:What technique was used by the investigators ?
Answer» SOLUTION :DNA FINGER PRINTING

Discussion

22965.	Question : (a) Smack (b) Diacetylmorphine (c) White (d) Odourless (e) Bitter crystalline compound Above statements/informations are correct for:-
Answer» Morphine Heroin Coccain Barbiturates Answer :B

Discussion

22966.	Question : A small aquatic plant was put in which of the petri dishes X,Y,Z, containing different culture solution, after six weeks, the plants dish-X had the same number of leaves as it had previously and they all were small and yellowish. Plant in dish Y had more leaves of normal size and dark greenn colour. plants in dish Z had more leaves of normal size bu tvery pale. identify the missing elements in the three petridish (X,Y,Z) ?
Answer» X-Magnesium, Y-Phosphorus, Z-nitrogen X-Phosphorus, Y-Magnesium, Z-Nitrogen X-Phosphorus, Y-Nitrogen, Z-Magnesium X-Magnesium, Y-Nitrogen, Z-Phosphorus Answer :A

Discussion

22967.	Question : A slogan related with family planning program is given below. "We two, have two", "We one, have one". As a citizen of India, state your response on it. Hint : In the year 2020, it is expected that India becomes the most populous nation in the world.
Answer» Solution :"We TWO have two" In 1947, at the time of partition, the population of India, Pakistan and Sri Lanka was 53 crore. At present, the population of India alone is 105 crore. If the present growth CONTINUES, in the very near future man will face the SCARCITY for FOOD, housing drinking water and other basic necessities. So we must follow the government policy .we two have two.. China has passed a strict law that there will be one child from one couple. Anybody having second child pays tax to the government for 18 years. Is it not possible that this law is to be passed in India also ? We one have one The planned BIRTH policy is the birth control policy of the government of the People.s Republic of China. It is known in western society as the one child policy due to the required payment of a social .compensation fee. for couples having more than one child in urban areas. China generally perceived the pandemic of overpopulation problem. With the associated social and environmental problems, stimulated the government to take strong unique measures in population planning policy. In the future, India also may change the policy from "We two have two" to "We one have one".

Discussion

22968.	Question : A skeletal muscle fibre is
Answer» 1. BINUCLEATE 2. Uninucleate 3. MULTINUCLEATE 4. Enucleate Answer :C

Discussion

22969.	Question : A sinistral shelled female snail has Dd genotype cross with dextral shelled male having dd genotype. What type of shell will be present in the progeny?
Answer» All DEXTRAL All sinistral 50% dextral, 50% sinistral None ANSWER :A

Discussion

22970.	Question : A single-strandard DNA or RNA, tagged with a radioactive molecule (probe) is allowed A single-strandard DNA or RNA, tagged with a radioactive molecule (probe) is allowed to clone of cells followed by detection using clone of cells followed by detection using
Answer» PHOTOGRAPHIC film autoradiography amplification PCR ANSWER :B

Discussion

22971.	Question : A single strand of nucleic acid tagged with radioactive molecule is called :
Answer» VECTOR SELECTABLE marker Plasmid PROBE Solution :Probe

Discussion

22972.	Question : A single strand of nucleic acid tagged with a radioactive molecule is called :
Answer» SELECTABLE marker plasmid probe Vector Answer :C

Discussion

22973.	Question : A single isolation of muscle fibre is known as
Answer» Twitch Tetany Cramp Muscle tone Answer :A

Discussion

22974.	Question : A single gene mutation affecting more than one phenotype is called
Answer» Azotropic Auxotropic Pleiotropic myxotrophic Answer :C

Discussion

22975.	Question : A single genotype can give rise to a range of phenotypes, called the genotypes's
Answer» NORM of reaction fitness set adptive complex supergene Answer :A

Discussion

22976.	Question : A single base mutation in a gene may not 'always' result in loss or gain of function. Do you think the statement is correct ? Defend your answer.
Answer» Solution :The statement is correct. Because of degeneracy of codons, MUTATIONS at third BASE of CODON, usually does not result into any change in phenotypc. This is CALLED silent mutations.

Discussion

22977.	Question : A single base mutation in a gene may not 'always' result in loss or gain of function. Do you think the statement is correct? Defend your answer.
Answer» SOLUTION :The STATEMENT is correct. Because of degeneracy of CODONS, mutations at third base of codon, USUALLY does not result into any change in phenotype.

Discussion

22978.	Question : A single Barr body in male is found in
Answer» X XXY XX XXXY SOLUTION :XXY

Discussion

22979.	Question : A single anticodon can recognise more than one codon of mRNA. This phenomenon is termed as
Answer» RICHMOND and LANG effect gene FLOW hypothesis wobble hypothesis template hypothesis Answer :C

Discussion

22980.	Question : A single amino acid is often coded by more than one triplet code. In most of the cases the first two bases are the same but the third base is different. This feature of the genetic codes is called
Answer» universality non-overlapping and commaless redundancy and degeneracy non- ambiguity Answer :C

Discussion

22981.	Question : [A]: Sickle-cell anaemia is a genetically de- termined disorder affecting many new born babies. [R]: It is caused by heterozygosity for allele Hb^c , producing a single amino acid substitu- tion in the a-chain of the normal haemoglo- bin molecule determined by allele Hb^A.
Answer» If both A and R are TRUE and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false ANSWER :C

Discussion

22982.	Question : A short live phase between meiosis II and II is
Answer» Diakinesis Interkinesis Cytokinesis Interphase Answer :B

Discussion

22983.	Question :A sex chromosome complement of person with turner syndrome is
Answer» XXY XYY XO YO SOLUTION :XO

Discussion

22984.	Question : A sexual reproductive structure like gemmules are observed in ………..
Answer» Sponges Hydra Penicillium Zoospora Answer :A

Discussion

22985.	Question :A sewage treatment process in which part of decomposer bacteria present in the wastes is recycled into the starting of the process is called(A) Cyclic treatment(B) Activated sludge treatment(C) Primary treatment(D) Tertiary treatment
Answer» CYCLIC TREATMENT ACTIVATED SLUDGE treatment PRIMARY treatment Tertiary treatment Solution :Activated sludge treatment

Discussion

22986.	Question : A set of standards by which a community regulates its behaviour and activities in relation to the biological world is termed as:
Answer» Biopatent Biopiracy Patent Bioethic Answer :D

Discussion

22987.	Question : A set of three nucleotides on tRNA responsible for attachment of the tRNA with mRNA at specific codon.
Answer» ANSWER :ANTICODON

Discussion

22988.	Question : A sequential expression of a set of human genes occurs when a steroid molecule bind to the
Answer» MessengerRNA DNA sequence Ribosome Transfer RNA Answer :B

Discussion

22989.	Question : A set of bacterial clones, each containing a plasmid or phage, is called as(A) Gene library(B) Gene pool(C) Genophore(D) Genome
Answer» GENE LIBRARY Gene POOL GENOPHORE Genome Solution :Gene library

Discussion

22990.	Question : A sequence of species through which the organic molecules in a community pass is called
Answer» FOOD CHAIN Food web Nutrient CYCLE Food cycle SOLUTION :Food chain

Discussion

22991.	Question : A specific place in an ecosystem, where an organism lives and performs its functions is
Answer» HABITAT NICHE landscape biome Answer :B

Discussion

22992.	Question : A set of three nucleotides that codes for an amino acids.
Answer» ANSWER :CODON

Discussion

22993.	Question : A self-fertilizing trihybrid plant from:
Answer» 4 different gametes and 16 different zygotes 8 different gametes and 16 different zygotes 8 different gametes and 32 different zygotes 8 different gametes and 64 different zygotes Answer :D

Discussion

22994.	Question : A selectsble marker is used in the section of recomninants on the basisi of their ability the name of produce colour in presence of choromogenic substrate. (c ) How is it advantagegeous over using antibiotic resistant gene as a selectable market?
Answer» SOLUTION :(C ) SELECTION of recombinants due to inactivation of antibiotics requires simultaneous plating FON two PLATES having different antibiotics.

Discussion

22995.	Question : A self fertilizing trihybrid plant forms
Answer» 4 different gametes and 16 different ZYGOTES 8 different gametes and 16 different zygotes 8 different gametes and 32 different zygotes 8 different gametes and 64 different zygotes Solution :8 different gametes and 64 different zygotes

Discussion

22996.	Question : A selectsble marker is used in the section of recomninants on the basisi of their ability the name of produce colour in presence of choromogenic substrate. (b) Which enzyme is involved in production of colour ?
Answer» SOLUTION :(B) `BETA`-galactosides.

Discussion

22997.	Question : A selectsble marker is used in the section of recomninants on the basisi of their ability the name of produce colour in presence of choromogenic substrate. (a) Mention the name of mechanism involved.
Answer» SOLUTION :(a) INSERTIONAL INACTIVATION

Discussion

22998.	Question : A selection that acts to eliminate one extreme from an array of phenotypes is
Answer» DISRUPTIVE DIRECTIONAL Stabilising Coevolution ANSWER :B

Discussion

22999.	Question : A segment of DNA molecule contains 20,000 base pairs. What is the number of phosphate molecule in this DNA molecule ?
Answer» 20000 40000 10000 5000 Answer :B

Discussion

23000.	Question : A segment of DNA has the triplet base sequence AAC, GAC, AGC, CGC ACA and AAA. Due to mutation,the first base only got deleted. Then the likely effect of this on the coding of DNA segment is that
Answer» There will be COMPLETE change in the types and sequence of AMINO acids POLYPEPTIDE will have one amino ACID less There will be no change in polypeptide chain formed The first amino acid will be different Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : A species-area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas ?

Question : A special type of facilitated diffusion related to movement of solvents only through living systems is called

Question : [A]: Some babies have a small tail.[R]: This is just a freak of nature and has no explanation

Question : A special membranous structure which is formed by the extensions of plasma membrane into the cell, is called as :-

Question : (A]: Somtaomedin secreted by liver is also called IGF.[R]: Somatomedin and somatostatin are syn- onyms.

Question : A somatic plant cell has potential to develop into a full plant. This is called:

Question : A solution of Chlorophyll pigments looks red in reflected light because of

Question : A solution of chlorphyll pigments looks red in reflected light because of

Question : A solution of 1.0M glucose develops a pressure of -27 bars in an oxmometer. What is notcorrect ?

Question : A solution is differ from pure water in having –

Question : A small protein attached to the outer surfce of the inner membrane and which acts as a mobile carrier for transafer of electron between complex III and IV

Question : A small lobe remains hidden under the lateral cerebral fissure which is known as_____.

Question : A small fragment of skin of a different person was extracted from the nails of a murdered person. This fragment of skin led the crime investigators to the murder.Based on this incident answer the following questions:What is the procedure involved in this technique ?

Question : A small fragment of skin of a different person was extracted from the nails of a murdered person. This fragment of skin led the crime investigators to the murder.Based on this incident answer the following questions:What technique was used by the investigators ?

Question : (a) Smack (b) Diacetylmorphine (c) White (d) Odourless (e) Bitter crystalline compound Above statements/informations are correct for:-

Question : A slogan related with family planning program is given below. "We two, have two", "We one, have one". As a citizen of India, state your response on it. Hint : In the year 2020, it is expected that India becomes the most populous nation in the world.

Question : A skeletal muscle fibre is

Question : A sinistral shelled female snail has Dd genotype cross with dextral shelled male having dd genotype. What type of shell will be present in the progeny?

Question : A single-strandard DNA or RNA, tagged with a radioactive molecule (probe) is allowed A single-strandard DNA or RNA, tagged with a radioactive molecule (probe) is allowed to clone of cells followed by detection using clone of cells followed by detection using

Question : A single strand of nucleic acid tagged with radioactive molecule is called :

Question : A single strand of nucleic acid tagged with a radioactive molecule is called :

Question : A single isolation of muscle fibre is known as

Question : A single gene mutation affecting more than one phenotype is called

Question : A single genotype can give rise to a range of phenotypes, called the genotypes's

Question : A single base mutation in a gene may not 'always' result in loss or gain of function. Do you think the statement is correct ? Defend your answer.

Question : A single base mutation in a gene may not 'always' result in loss or gain of function. Do you think the statement is correct? Defend your answer.

Question : A single Barr body in male is found in

Question : A single anticodon can recognise more than one codon of mRNA. This phenomenon is termed as

Question : A single amino acid is often coded by more than one triplet code. In most of the cases the first two bases are the same but the third base is different. This feature of the genetic codes is called

Question : [A]: Sickle-cell anaemia is a genetically de- termined disorder affecting many new born babies. [R]: It is caused by heterozygosity for allele Hb^c , producing a single amino acid substitu- tion in the a-chain of the normal haemoglo- bin molecule determined by allele Hb^A.

Question : A short live phase between meiosis II and II is

Question :A sex chromosome complement of person with turner syndrome is

Question : A sexual reproductive structure like gemmules are observed in ………..

Question :A sewage treatment process in which part of decomposer bacteria present in the wastes is recycled into the starting of the process is called(A) Cyclic treatment(B) Activated sludge treatment(C) Primary treatment(D) Tertiary treatment

Question : A set of standards by which a community regulates its behaviour and activities in relation to the biological world is termed as:

Question : A set of three nucleotides on tRNA responsible for attachment of the tRNA with mRNA at specific codon.

Question : A sequential expression of a set of human genes occurs when a steroid molecule bind to the

Question : A set of bacterial clones, each containing a plasmid or phage, is called as(A) Gene library(B) Gene pool(C) Genophore(D) Genome

Question : A sequence of species through which the organic molecules in a community pass is called

Question : A specific place in an ecosystem, where an organism lives and performs its functions is

Question : A set of three nucleotides that codes for an amino acids.

Question : A self-fertilizing trihybrid plant from:

Question : A selectsble marker is used in the section of recomninants on the basisi of their ability the name of produce colour in presence of choromogenic substrate. (c ) How is it advantagegeous over using antibiotic resistant gene as a selectable market?

Question : A self fertilizing trihybrid plant forms

Question : A selectsble marker is used in the section of recomninants on the basisi of their ability the name of produce colour in presence of choromogenic substrate. (b) Which enzyme is involved in production of colour ?

Question : A selectsble marker is used in the section of recomninants on the basisi of their ability the name of produce colour in presence of choromogenic substrate. (a) Mention the name of mechanism involved.

Question : A selection that acts to eliminate one extreme from an array of phenotypes is

Question : A segment of DNA molecule contains 20,000 base pairs. What is the number of phosphate molecule in this DNA molecule ?

Question : A segment of DNA has the triplet base sequence AAC, GAC, AGC, CGC ACA and AAA. Due to mutation,the first base only got deleted. Then the likely effect of this on the coding of DNA segment is that