24277 + Interview Questions in Biology in Class 12 Page 480 InterviewSolution

23951.	Question : A) Acetyl choline B) Nor epinephrine C) Serotonin the common feature of the above
Answer» All are drugs All are NEUROTRANSMITTERS All are antigens All are hormones Answer :B

Discussion

23952.	Question : [A]: According to Hardy-Weinburg law both gene frequencies and genotype frequencies will remain constant from generation to gen- eration in an infinitely large interbreeding population.[R]: Alleles segregating in a population tend to establish an equilibrium with reference to each other, thus maintain both frequencies constant.
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 :A

Discussion

23953.	Question : [A]: According to the theory of Lamarck use and disue caused the increase and de- crease in size of organs and environment caused the changes which can be trans- ferred to next generation.[R]: Modern synthetic theory is also known as Neo-Lamarckism.
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

23954.	Question : [A] : Accomodation in the bird's eye is con- trolled by the ciliary apparatus.[R]: It involves deformation of retina.
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

23955.	Question : [A]: A gene affecting the expression of an- other nonallelic gene is called epistatic gene. [R]: Epistatic gene hides the expression of an allele at a different locus
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 :A

Discussion

23956.	Question : A,AB and B blood groups are formed in 1:2:1 ratio by
Answer» `I^(A)I^(O) XX I^(A) I^(B)` `I^(A)I^(B) xx I^A I^(B)` `I^(B) I^(O) xx I^(A) I^(B)` All these ANSWER :B

Discussion

23957.	Question : [A]: A tadpole whose thyroid gland has been removed does not metamorphose into adult [R]: calcitonin and thyroxine are produced from thyroid gland, these hormones stimu- late protein synthesis for the development and growth of tadpole larva.
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 :A

Discussion

23958.	Question : (a) A DNA segment has a total of 1,500 nucleotides, out of which 410 are Guanine containing nucleotides. How many pyrimidine bases this segment possesses ? (b) Draw a diagrammatic sketch of a portion of DNA segment to support your
Answer» Solution :Cytosine ·and thymine are PYRIMIDINES. ACCORDING ·to Chargaff's rule, the ratio of purism to pyrimidines is equal C = G Number of guanine-containing nucleotides = 410 `G=C=410rArr 410 +410 = 820` Number of adenine = Number of thymine A+T= Total number of nucleotids - nucleotides conrtaining G & C nitrogoenious =1500- 820 = 680 A= T = 340 Number of pyrimedines in segment = C+T= 410 + 340 = 750 (b) For diagrammatic Sketch : See Q . 1 (b) Set- I Delhi Board 2015

Discussion

23959.	Question : A : A couple having genetic disease use donor ovum and sperm cell for fertilization. R :Embryo obtained in donation is implanted in fallopian tube .
Answer» A & R are CORRECT , R is EXPLANATION of A A & R are correct , R is not the explanation of A A is correct, R is INCORRECT A is incorrect , R is correct ANSWER :C

Discussion

23960.	Question : [A] : A blood dialyser is an artificial kidney which can sustain kidney functions.[R]: It is an exact copy of natural kidney
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

23961.	Question :A 30 year old woman has bleedy diarrhoea for the past 14 hours, which one of the following organisms is likely to cause this illness?
Answer» STREPTOCOCCUS pyogens Clostridium difficile SHIGELLA dysenteriae Salmonella entritidis Solution :Shigella dysenteriae

Discussion

23962.	Question : A 30-year old man with no prior immunisation, steps on nail while walking in his courtyard. Which immunisation is required?
Answer» SOLUTION :TETANUS TOXOID

Discussion

23963.	Question : A 340 Å long segment of DNA molecules has 20 thymine nitrogenous bases, what will be the number of guanine nitrogen b ases in thesame segment
Answer» 10 40 80 160 Answer :C

Discussion

23964.	Question :A 3' ______________ 5' B C 5' _______________ 3'D AB and CD represent two strands of a DNA molecule. When this molecule undergoes replication, forming a replication fork between A and C in the above. (i) Name the template strands for replication. (ii) Using which strand as the template, will there be continuous synthesis of a complementary DNA strand? (iii) Complementary to which strand will Okazaki segments get synthesised and discontinuous synthesis will occur (iv) What are template strands and Okazaki pieces? (v) In which direction is a new strand synthesized?
Answer» Solution :(i)AB, CD (ii) AB(III) CD (iv) Template strands: Parental DNA strands complementary to which NEW strands of DNA are synthesized: Okazaki fragments are short SEGMENTS of DNA synthesized on lagging strand (v) 5'-3'

Discussion

23965.	Question : A 15:1 F_(2)ratio of a cross between a wheat variety with red kernels (homozygous for two dominant genes) and another with white kernels shows
Answer» Polygenic inheritance That the two GENES are COMPLEMENTARY SINGLE FACTOR inheritance That it is a test cross Answer :A

Discussion

23966.	Question : A: 100 ml of venous blood has 14.4 ml of O_(2) i.e., it is still 75% saturated with oxygen in normal condition. R: About 4.6 ml of O_(2) i.e. 25% diffuses from arterial blood into the tissue during exercise.
Answer» If both Assertion & REASON are true and the reason is the CORRECT explanation of the assertion, then mark (1) If both Assertion & Reason are trye but the reason is not the correct explanation of the assertion , then mark (2) If Assertion is true statement but Reason is fakse, then mark (3) If both Assertion and Reason are false statements, then mark (4) Answer :C

Discussion

23967.	Question : A 15 : 1 F_(2) ratio of a cross between a wheat variety with red kerels (homozygous for two dominant genes) and another with white kernels shows
Answer» Polygenic inheritance that the TWO GENES are complementary single FACTOR inheritance that it is a TEST cross Answer :A

Discussion

23968.	Question : a-1 antitrypsin as:
Answer» An antacid An enzyme Used to TREAT arthritis Used to treat emphysema Answer :D

Discussion

23969.	Question : 99% of genes of this animal are direct counter parts of the humans
Answer» RANA tigrina Mus MUSCULUS Struthio camelus Drosophila melanogaster Answer :B

Discussion

23970.	Question : 95 % of the existing transgenic animals are
Answer» FISH pigs SHEEP mice Solution :TRANSGENIC rats,rabbit,pigs,sheep,COWS and fish have been produced, although 95 % of all existing transgenic animals are mice.

Discussion

23971.	Question : 81 genotypes in a hybrid selfing will produces how many phenotypes ?
Answer» 81 16 8 32 Answer :B

Discussion

23972.	Question :87. Which one of the following shows isogamy'with non flagellated gametes :
Answer» Ectocarpus Ulothrix SPIROGYRA Sargassum Answer :C

Discussion

23973.	Question : 8-nucleate embryo sac is :
Answer» Monosporic Bisporic Tetrasporic All of the above Answer :D

Discussion

23974.	Question : 70S Ribosomes is seen in:
Answer» BACTERIAL cell Mitochondria Both(a)and(B) ER Answer :C

Discussion

23975.	Question : 7 celled-8 nucleate embryosac is
Answer» Monosporic Bisporic Tetrasporic All of these Answer :D

Discussion

23976.	Question : 61 codons code for 20 amino acids because of the property :
Answer» Non-overlapping Comaless degeneracy Wobbling Answer :C

Discussion

23977.	Question : 6-furfuryl amino purine, 2-4-dichlorophenoxy acetic acid and indole-3 acetic acid are examples respectively for
Answer» SYNTHETIC AUXIN, KINETIC and natural auxin gibberelling, natural auxin and KINETIN natural auxin, kinetin and synthetic auxin kinetin, synthetic auxin and natural auxin ANSWER :D

Discussion

23978.	Question : 60% of respiration in liver cells is performed through
Answer» Phosphogluconate shunt Glycolysis Anaerobic respiration Common pathway. Solution :N//A

Discussion

23979.	Question : 6-furfuryl amino purine, 2-4- dichlorophenoxy acetic acid and indole 3 acetic acid are examples respectively for:
Answer» SYNTHETIC AUXIN, KINETIN and NATURAL auxin Gibberellin, natural auxin and kinetin Natural auxin, kinetin and synthetic auxin Kinetin, synthetic auxin and natural auxin Answer :D

Discussion

23980.	Question : 60% of angiosperms, pollen grains shed at 2 celled stage, but in some species pollen grains are shed at 3 celled stage. Give the significance of germ pore of of exine surface.
Answer» SOLUTION :Germ pore is the opening through which pollen TUBE COME out during pollen GERMINATION.

Discussion

23981.	Question : 5' rarr 3' Exonuclease activity is found in :-
Answer» DNA POLYMERASE II DNA polymerase I DNA polymerase III All of the above Answer :B

Discussion

23982.	Question : 5-Methyl uracil means ……….(A) Guanine(B) Uracil(C) Thymine(D) Cytosine
Answer» GUANINE Uracil Thymine Cytosine ANSWER :C

Discussion

23983.	Question : 5' AGCT3' is the recognition sequence and cleavage site for which of the following enzyme ?
Answer» Alul BamHl EcoRl Hindlll Answer :A

Discussion

23984.	Question : 4
Answer» 5 6 8 Answer :D

Discussion

23985.	Question : 33 per cent of India.s (Gross Domestic Product) comes from
Answer» Industry Agriculture Export Small-scale cottage industries. Solution :33 per CENT of India.s (Gross DOMESTIC PRODUCT) comes from agriculture. 2

Discussion

23986.	Question : 3 is :-
Answer» `9:3:3:1` `1:1:1:1` `1:2:2:1` `1:1:2:2` ANSWER :C

Discussion

23987.	Question : 2n-1 is an example of
Answer» polyploidy aneuploidy euploidy diploidy Answer :B

Discussion

23988.	Question : 2H_(2)A+CO_(2)overset("light")to2A+CH_(2)O+H_(2)O in this given equation H2A represents to H2S, now it would be applicable on :-
Answer» All prokaryotes All eukaryotes Only some prokaryotes Only some eukaryotes Answer :C

Discussion

23989.	Question : 2A +3G -3-Poverset("Transketolase")rarr 2xylulose-5-phosphate +2B
Answer» SEDOHEPTULOSE 7 phosphate and erythrose 4 phoshate FRUCTOSE 6 phosphate an RIBOSE 5 phoshate DHAP and fructose 6 phosphate Answer :C

Discussion

23990.	Question : The formation of 256 pollen grains is done by how many meiotic division and from which cells?(A) 64 microspore mother cell(B) 128 microspore mother cell(C) 512 microspore mother cell(D) 256 microspore mother cell
Answer» 64 MICROSPORE MOTHER cell 128 microspore mother cell 512 microspore mother cell 256 microspore mother cell Answer :A

Discussion

23991.	Question : 250 microsporocytes will give rise to ……. Microspores(A) 250(B) 500(C) 1000(D) 2500
Answer» 250 500 1000 2500 Answer :C

Discussion

23992.	Question : 250 kg cow produces 200 gm protein /day. In same period 250 gm of methylophilus methylotrophus produces 25 tonnes of protein. Then what is single cell protein?
Answer» SOLUTION :SINGLE cell PROTEIN is a microbial biomass which is used as a FOOD or FEED. It is an alternative protein source for animal and human nutrition.

Discussion

23993.	Question : 250 g of Methylophilus may proude _____________ tonnes of
Answer» 25 10 80 100 Answer :A

Discussion

23994.	Question : 2,3 bispshosphoglycerate
Answer» increases AFFINITY of Hb for `CO_2` increases affinity of Hb for `CO ` increases affinity of Hb for `O_2` decreases affinity of Hb for `O_2` ANSWER :D

Discussion

23995.	Question : 2003 was celebrated as the 50th anniversary of discovery of :
Answer» TRANSPOSON by barbara mcclintock Structure of DNA by WATSON and crick BOTH(A) AND (B) None of these Answer :B

Discussion

23996.	Question : 2% of adult globin in humans is made of
Answer» `alpha_(2)epsi_(2)` `zeta_(2)gamma_(2)` `alpha_(2)del_(2)` `alpha_(2)gamma_(2)`. SOLUTION :N//A

Discussion

23997.	Question : 1st vertebra is:
Answer» Axis Atlas Thoracic Lumbar Answer :B

Discussion

23998.	Question : 16 celled embryo is called …………
Answer» Foetus Zygote Morula Blastocyst Answer :C

Discussion

23999.	Question : 5th june is celebrated as :
Answer» World TYPHOID DAY World AIDS day World ENVIRONMENT day World Tobacco day Answer :C

Discussion

24000.	Question : F_2 generation ina Mendelian cross showed that both genotypic and phenotypic ratios are some as 1 : 2 : 1. It represents a case of
Answer» ANSWER :QUANTITATIVE INHERITANCE

Discussion

Explore topic-wise InterviewSolutions in .

Question : A) Acetyl choline B) Nor epinephrine C) Serotonin the common feature of the above

Question : [A]: According to the theory of Lamarck use and disue caused the increase and de- crease in size of organs and environment caused the changes which can be trans- ferred to next generation.[R]: Modern synthetic theory is also known as Neo-Lamarckism.

Question : [A] : Accomodation in the bird's eye is con- trolled by the ciliary apparatus.[R]: It involves deformation of retina.

Question : [A]: A gene affecting the expression of an- other nonallelic gene is called epistatic gene. [R]: Epistatic gene hides the expression of an allele at a different locus

Question : A,AB and B blood groups are formed in 1:2:1 ratio by

Question : [A]: A tadpole whose thyroid gland has been removed does not metamorphose into adult [R]: calcitonin and thyroxine are produced from thyroid gland, these hormones stimu- late protein synthesis for the development and growth of tadpole larva.

Question : (a) A DNA segment has a total of 1,500 nucleotides, out of which 410 are Guanine containing nucleotides. How many pyrimidine bases this segment possesses ? (b) Draw a diagrammatic sketch of a portion of DNA segment to support your

Question : A : A couple having genetic disease use donor ovum and sperm cell for fertilization. R :Embryo obtained in donation is implanted in fallopian tube .

Question : [A] : A blood dialyser is an artificial kidney which can sustain kidney functions.[R]: It is an exact copy of natural kidney

Question :A 30 year old woman has bleedy diarrhoea for the past 14 hours, which one of the following organisms is likely to cause this illness?

Question : A 30-year old man with no prior immunisation, steps on nail while walking in his courtyard. Which immunisation is required?

Question : A 340 Å long segment of DNA molecules has 20 thymine nitrogenous bases, what will be the number of guanine nitrogen b ases in thesame segment

Question : A 15:1 F_(2)ratio of a cross between a wheat variety with red kernels (homozygous for two dominant genes) and another with white kernels shows

Question : A: 100 ml of venous blood has 14.4 ml of O_(2) i.e., it is still 75% saturated with oxygen in normal condition. R: About 4.6 ml of O_(2) i.e. 25% diffuses from arterial blood into the tissue during exercise.

Question : A 15 : 1 F_(2) ratio of a cross between a wheat variety with red kerels (homozygous for two dominant genes) and another with white kernels shows

Question : a-1 antitrypsin as:

Question : 99% of genes of this animal are direct counter parts of the humans

Question : 95 % of the existing transgenic animals are

Question : 81 genotypes in a hybrid selfing will produces how many phenotypes ?

Question :87. Which one of the following shows isogamy'with non flagellated gametes :

Question : 8-nucleate embryo sac is :

Question : 70S Ribosomes is seen in:

Question : 7 celled-8 nucleate embryosac is

Question : 61 codons code for 20 amino acids because of the property :

Question : 6-furfuryl amino purine, 2-4-dichlorophenoxy acetic acid and indole-3 acetic acid are examples respectively for

Question : 60% of respiration in liver cells is performed through

Question : 6-furfuryl amino purine, 2-4- dichlorophenoxy acetic acid and indole 3 acetic acid are examples respectively for:

Question : 60% of angiosperms, pollen grains shed at 2 celled stage, but in some species pollen grains are shed at 3 celled stage. Give the significance of germ pore of of exine surface.

Question : 5' rarr 3' Exonuclease activity is found in :-

Question : 5-Methyl uracil means ……….(A) Guanine(B) Uracil(C) Thymine(D) Cytosine

Question : 5' AGCT3' is the recognition sequence and cleavage site for which of the following enzyme ?

Question : 4

Question : 33 per cent of India.s (Gross Domestic Product) comes from

Question : 3 is :-

Question : 2n-1 is an example of

Question : 2H_(2)A+CO_(2)overset("light")to2A+CH_(2)O+H_(2)O in this given equation H2A represents to H2S, now it would be applicable on :-

Question : 2A +3G -3-Poverset("Transketolase")rarr 2xylulose-5-phosphate +2B

Question : The formation of 256 pollen grains is done by how many meiotic division and from which cells?(A) 64 microspore mother cell(B) 128 microspore mother cell(C) 512 microspore mother cell(D) 256 microspore mother cell

Question : 250 microsporocytes will give rise to ……. Microspores(A) 250(B) 500(C) 1000(D) 2500

Question : 250 kg cow produces 200 gm protein /day. In same period 250 gm of methylophilus methylotrophus produces 25 tonnes of protein. Then what is single cell protein?

Question : 250 g of Methylophilus may proude _____________ tonnes of

Question : 2,3 bispshosphoglycerate

Question : 2003 was celebrated as the 50th anniversary of discovery of :

Question : 2% of adult globin in humans is made of

Question : 1st vertebra is:

Question : 16 celled embryo is called …………

Question : 5th june is celebrated as :

Question : F_2 generation ina Mendelian cross showed that both genotypic and phenotypic ratios are some as 1 : 2 : 1. It represents a case of