24277 + Interview Questions in Biology in Class 12 Page 323 InterviewSolution

16101.	Question : How many bands are seen when immunoglobulin G molecules are analysed on a sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) under reducing conditions ?
Answer» 6 1 2 4 Solution :On SDS-PAGE of IGG TWO PRINCIPAL BANDS are VISIBLE

Discussion

16102.	Question : How many autosomes are present in a mature human sperm ?
Answer» 20 22 44 46 Answer :B

Discussion

16103.	Question : How many ATPs are produce when 12H^+Pass through F_0 – F _1particle ?
Answer» 2 ATP 4 ATP 6 ATP 5 ATP Answer :C

Discussion

16104.	Question : How many autosomes are found in a single mature human sperm?
Answer» SOLUTION : 22 AUTOSOMES

Discussion

16105.	Question : How many ATP molecules produced from the complete oxidation of a glucose in aerobic prokaryotes ?
Answer» 2 ATP 4 ATP 38 ATP 36 ATP Answer :C

Discussion

16106.	Question : How many ATP molecules will be generated in plant system during complete oxidation of 40 molecules of glucose?
Answer» 180 360 1440 3040 Answer :C

Discussion

16107.	Question : How many ATP molecules will be generated in a plant system during complete oxidation of 40 moles of glucose ?
Answer» 190 380 1520 3040 Answer :C

Discussion

16108.	Question : How many ATP molecules can be generated by one molecule of Acetyl Co enzyme A, one molecule of PEP and one molecule of pyruvic acid when fed into respiratory cycle
Answer» `15,16,12` `12,16,15` `12,15,16` `16,15,12` ANSWER :B

Discussion

16109.	Question : How many ATP molecules are formed during anaerobic respiration?
Answer» 2 4 6 8 Answer :B

Discussion

16110.	Question : How many animal species are likely to become extinct ?
Answer» 3,50,000 35000 1700 3500 Solution :3,50,000

Discussion

16111.	Question : How many ATP molecule produces by one molecule of hexose via malate-Aspartate route :-
Answer» 12 ATP 36 ATP 38 ATP 4 ATP ANSWER :C

Discussion

16112.	Question : How many ATP are synthesized per glucose molecule (gross synthesis) in aerobic respiration through substrate level phosphorylation ?
Answer» 10 12 30 6 Answer :D

Discussion

16113.	Question : How many amoung the following are consequences of deforestation?
Answer» 6 5 4 3 Answer :B

Discussion

16114.	Question :How many among the the following bacteria are involved in nitrogen fixation? Bacillus ramosus,Pseudomonas, Lactobacillus, Beijerinckia, Frankia,Klebsiella, Clostridium, Bacillus subtilis, Salmonella, Rhizobium
Answer» 4 7 6 5 Answer :D

Discussion

16115.	Question : how many amongthe statements mentioned above are correct ?
Answer» 3 4 1 2 Answer :B

Discussion

16116.	Question : How many among the given statements are incorrect? a.All of the nodal tissue in human heart is capable of generating 70-75 action protentials in a minute. b.Lymph is devoid of all formed elements of blood. c.Cardiac output is defined as the volume of blood pumped by each ventricle in a cardiac cycle. d.Wall of left ventricle is thickest among all four chambers of human heart.
Answer» Four Three Two One Answer :A

Discussion

16117.	Question : How many among the given amino are essential and must be obtained from food? Phenylalanine Valine Leucine Glycine Isoleucine Threonine Aspartic acid
Answer» 4 5 6 7 Answer :B

Discussion

16118.	Question : How many among the following can have lifespan of more than 100 years Tortoise, Crocodile, Elephant, Horse, Peepal tree, Parrot, Crow, Banyan tree
Answer» 2 3 4 5 Answer :C

Discussion

16119.	Question : How many among the following are members of rhodophyceae and phaeophyceae, respectively?[Fucus, Ulothrix, Spirullina, Gelidium, Chalmydomonas nivalis, Porphyra, Chlorella, Polysiphonia Sargassum, Laminaria, Ectocarpus, Gracilaria.]
Answer» 5,4 3,5 4,5 4,4 Answer :D

Discussion

16120.	Question : How many among the following are mosses and liverworts respectively? Sphagnum, Riccia, Polysiphonia, Fucus, Marchantia, Sargassum, Funaria, Porphyra,Porella, Polytrichum
Answer» 4,4 4,5 3,2 3,3 Answer :D

Discussion

16121.	Question : How many among the following are haploid structure of bryophytes? Gametophyte, Zygote, Sporophyte, Seta, Rhizoid, Antheridium, Protonima, Antherozoid, Spore, NCC, Archegonium, Oosphere
Answer» 6 11 9 8 Answer :C

Discussion

16122.	Question : How many among the following are Ex-situ and In-situ conservation strategies respectively.
Answer» 5,4 4,5 6,3 3,6 Answer :A

Discussion

16123.	Question : How many among the following are diploid structures of gymnosperms?
Answer» 5 7 4 6 Answer :A

Discussion

16124.	Question : how many among the following are defining feature of living beings? ( reproduction, growth, metabolism, cellular organisation, consciousness)
Answer» 1 2 3 4 Answer :B

Discussion

16125.	Question : How many amino acids will be coded by following given or more than one cytosine represent the intron? AUG CCC CAC CAC UUA UAU AUA GGC GAC AAA GCG UUU CAU UAA
Answer» 7 8 10 11 Answer :A

Discussion

16126.	Question : How many amino acids are there in A and B sequence of human insulin respectively ?
Answer» 21,30 21,51 30,20 31,32 Solution :21,30

Discussion

16127.	Question : How many alleles are responsible for the following Starch synthesis in pea seeds.
Answer» SOLUTION :2 ALLELES

Discussion

16128.	Question : How many amino acids are involved in stabilising protein molcules?
Answer» 200 20 10 more than 200 Answer :B

Discussion

16129.	Question : How many amino acids are arranged in the two chains of Insulin?
Answer» Chain A has 12 and Chain B has 13 Chain A has 21 and Chain B has 30 amino acids Chain A has 20 and chain B has 30 amino acids Chain A has 12 and chain B has 20 amino acids SOLUTION : Chain A has 21 and Chain B has 30 amino acids

Discussion

16130.	Question : How many amino acids (A) and peptide bonds (B) are present in a tetrapeptide?
Answer» 4 - 4 ` 3 - 4` 4 - 3` 3 - 3` ANSWER :C

Discussion

16131.	Question : How many alleles determine the skin colour in human beings?
Answer» 3 6 4 2 Answer :B

Discussion

16132.	Question : How many additional ATPs are required in C_(4) plants as compared to C_(3) plants to synthesize 2 molecules of hexose sugar ?
Answer» 12 ATP 24 ATP 36 ATP 48 ATP Answer :B

Discussion

16133.	Question : How many alleles are responsible for the following ABO blood group.
Answer» SOLUTION :3 ALLELES

Discussion

16134.	Question : How macro molecules like DNA and RNA play their crucial role in evolutionary history?
Answer» Solution :Molecular evolution is the process of CHANGE in the sequence composition of molecules such as DNA. RNA and PROTEINS ACROSS generations. It uses principles of evolutionarý biolog and population genetics to explain patterns in the changes of molecules. One of the most useful advancement in the development of molecular biology is proteins and other molecules that control life processes are conserved among species. A SLIGHT change that occurs over TIME in these conserved molecules (DNA, RNA and protein) are often called molecular clocks. Molecules that have been used to study evolution are cytochrome c (respiratory pathway) and rRNA (protein synthesis).

Discussion

16135.	Question : How many abdominal ganglia are found in the nervous system of a cockroach.
Answer» ANSWER :SIX

Discussion

16136.	Question : How long the Miller and Urey expriment was carried
Answer» 1 WEEK 2 week 2 DAYS 1 month ANSWER :A

Discussion

16137.	Question : How LNG-20 act as contraceptive?
Answer» Solution :LNG-20 is a INTRA Uterine System of contraceptive method. It increases the VISCOSITY of cervical mucus and thereby preventing the SPERMS from ENTERING the CERVIX.

Discussion

16138.	Question : How J-shape differ from S-shape curve ?
Answer» SOLUTION :

Discussion

16139.	Question : How is ZIFT different from ICSI?
Answer» Solution :ZIFT: [Zygote INTRA fallopian transfer] The zygote or early embryo with up to 8 BLASTOMERES is TRANSFERRED into the fallopian tube is called ZIFT and ICSI [Intra cytoplasmic sperm injection]. It is a procedure to form an embryo in the laboratory by directly injecting the sperm into an ovum.

Discussion

16140.	Question : How it was proved that DNA is the Genetic material ?
Answer» Solution :EVEN though the discovery of nuclein by Meischer and the proposition for principles of inheritance by Mendel were almost at the same time but that the DNA ACTS as a geneticmaterial took long to be discovered and proven. By 1926, the quest to determine the mechanism for genetic inheritance had reached the molecular level. PREVIOUS discoveries by Gregor Mendel, Walter SUTTON, Thomas Hunt Morgan an NUMEROUS other scientists had narrowed the search to the chromosomes located in the nucleus of most cells.

Discussion

16141.	Question : How is Trypanosoma transmitted by infected to healthy persons?
Answer» SOLUTION :By VECTOR Tse-tse FLY.

Discussion

16142.	Question : How is tissue culture method useful for crop improvement?
Answer» Solution :As traditional breeding techniques failed to keep pace with demand and to provide sufficiently fast and efficient systems for crop improvement. Another technology called tissue culture is developed. It was learnt by scientists, during 1950s, that whole plant could be regenerated from explants. i.e. any part of a plant taken out and grown in a test tube, under sterile conditions in special nutrient media. This capacity to generate a whole plant from any cell/explant is called totipotency. It is important to stress here that the nutrient medium must provide a carbon source such as sucrose and also inorganic salts, vitamins, amino acids and growth regulators like auxins, cytokinins etc. By application of these methods it is possible to achieve propagation of a large number of plants in very short durations. This METHOD of producing thousands of plants through tissue culture is called micro propagation. Each of these plants will be genetically identical to the original plant from which they were grown. i.e. they are somaclones. Many important food plants like tomato, banana, apple etc. have been produced on commercial scale using this method. Another important application of the method is the recovery of healthy plants from diseased plants. Even if the plant is infected with a virus, the meristem is free of virus. Hence, one can remove the meristem and grow it in vitro to obtain virus free plants. Scientists have even isolated single cells from plants and after digesting their cell walls have been able to isolate naked protoplasts (surrounded by PLASMA membranes). Isolated protoplasts from two different varieties of plants each having a desirable character can be fused to get HYBRID protoplasts, which can be further grown to form a new plant. These HYBRIDS are called somatic hybrids while the process is called somatic hybridisation. When a protoplast of tomato is fused with that of potato and then they are grown to form new hybrid plants combining tomato and potato characteristics. Unfortunately this plant did not have all the DESIRED combination of characteristics for its commercial utilisation.

Discussion

16143.	Question :How is the translation of mRNA terminated? Explain.
Answer» Solution : mRNAcontains a stop condon (UAA,UAG,UGA) which do not code for any AMINO acid and are not identified by any tRNAs. As a tesult, the SYNTHESIS of polypeptide chain STOPS and the polypeptide chain is released from the ribosome.

Discussion

16144.	Question : How is the two stage process of protein synthesis advantageous?
Answer» Solution :The split gene feature of eukaryotic genes is almost entirely absent in prokaryotes. Originally each exon may have coded for a single polypeptide chain with a specific function. Since exon arrangement and intron removal are flexible, the exon coding for these polypeptide subunits act as domains combining in various ways to form new genes. Single genes can produce different functional proteins by arranging their exons in several different ways through alternate splicing patterns, a mechanism known to play an important role in generating both protein and functional diversity in animals. Introns would have arosen before or after the evolution of eukaryotic gene. If introns arose late how did they enter eukaryotic gene? Introns are mobile DNA sequences that can splice themselves out of, as well as into, specifie target sites. ACTING LIKE mobile transposon-like elements (that mediate transfer of genes between organisms - Horizontal Gene Transfer - HGT). HGT OCCURS between lineages of PROKARYOTIC cells, or from prokaryotic to eukaryotic cells and between eukaryotic cells. HGT is now hypothesized to have played a major role in the evolution of life on EARTH.

Discussion

16145.	Question : How is the ‘sixth episode of extinction’ of species on earth, now currently in progress, different from the five earlier episodes?. What is it due to? Explain the various causes that have brought about this difference.
Answer» Solution :Sixth episode of extinction is due to the climatic changes that killed them. Five episode that extinct today are i. early reptiles II. pelycosaurs iii. thecodonts IV. therapsids V. dinosaurs The sixth episode contains turtles, lizards, snakes, tuataras, crocodile, birds and mammals. Some are facing danger and are very near to extinct. e.g. the population of white Bengal tiger is decreasing rapidly due to UNLIMITED hunting to make money. The land reptiles i.e., dinosaurs, suddenly disappeared from the earth (mass extinction) about 65 million years ago due to the changes in climate, while the small SIZED reptiles continue to exist even today.

Discussion

16146.	Question : How is the scared grove important in conservation of biodiversity ?
Answer» SOLUTION :It HELPS to PROTECT TREES and WILDLIFE .

Discussion

16147.	Question :How is the progress being made in reproductive fields ?
Answer» Solution : Research on VARIOUS reproduction related areas are encouraged and supported by governmental and non-governmental agencies to find out new methods and / or to improve upon the existing ones. Saheli a new oral contraceptive for the females was developed by scientists at Central Drug Research Institute (CDRI) in lucknow in INDIA. It is an oral contraceptive PILL. Better AWARENESS about sex related matters, INCREASED number of medically assisted deliveries and better post-natal care leading to decreased maternal and infant mortality rates increased number of couples with small families and better detection and cure of STDs and over all increased medical facilities for all sex related problems. All indicatedimproved reproductive health of society

Discussion

16148.	Question : How is the presently occurring species extinction different from the earlier mass extinctions ?
Answer» SOLUTION :SPECIES extinction OCCURRING at PRESENT is DUE to anthropogenic causes where as the earlier extinction was due to natural causes.

Discussion

16149.	Question : How is the herd size increased by Multiple Ovulation and Embryo Transfer (MOET) technology?
Answer» Solution :Steps involve :- Administering a cow with FSH like hormone leading to multiple ovulation. Multiple ovulated cow is either mated with an elite bull or artificially inseminated. Transfer of fertilized eggs at 8-32 cell stage in to SURROGATE mothers after recovering non-surgically. The genetic MOTHER is available for ANOTHER round of multiple ovulation. This technology is employed in high milk YIELDING breeds of females and high quality meat yielding bulls SUCCESSFULLY to increase herd size.

Discussion

16150.	Question : How is the fertilization of amphibians differs from aves based site?
Answer» Solution :In AMPHIBIANS the FERTILIZATION is external (TAKING place outside the BODY of female organism) whereas internal fertilization TAKES place in aves.

Discussion

Explore topic-wise InterviewSolutions in .

Question : How many bands are seen when immunoglobulin G molecules are analysed on a sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) under reducing conditions ?

Question : How many autosomes are present in a mature human sperm ?

Question : How many ATPs are produce when 12H^+Pass through F_0 – F _1particle ?

Question : How many autosomes are found in a single mature human sperm?

Question : How many ATP molecules produced from the complete oxidation of a glucose in aerobic prokaryotes ?

Question : How many ATP molecules will be generated in plant system during complete oxidation of 40 molecules of glucose?

Question : How many ATP molecules will be generated in a plant system during complete oxidation of 40 moles of glucose ?

Question : How many ATP molecules can be generated by one molecule of Acetyl Co enzyme A, one molecule of PEP and one molecule of pyruvic acid when fed into respiratory cycle

Question : How many ATP molecules are formed during anaerobic respiration?

Question : How many animal species are likely to become extinct ?

Question : How many ATP molecule produces by one molecule of hexose via malate-Aspartate route :-

Question : How many ATP are synthesized per glucose molecule (gross synthesis) in aerobic respiration through substrate level phosphorylation ?

Question : How many amoung the following are consequences of deforestation?

Question :How many among the the following bacteria are involved in nitrogen fixation? Bacillus ramosus,Pseudomonas, Lactobacillus, Beijerinckia, Frankia,Klebsiella, Clostridium, Bacillus subtilis, Salmonella, Rhizobium

Question : how many amongthe statements mentioned above are correct ?

Question : How many among the given amino are essential and must be obtained from food? Phenylalanine Valine Leucine Glycine Isoleucine Threonine Aspartic acid

Question : How many among the following can have lifespan of more than 100 years Tortoise, Crocodile, Elephant, Horse, Peepal tree, Parrot, Crow, Banyan tree

Question : How many among the following are members of rhodophyceae and phaeophyceae, respectively?[Fucus, Ulothrix, Spirullina, Gelidium, Chalmydomonas nivalis, Porphyra, Chlorella, Polysiphonia Sargassum, Laminaria, Ectocarpus, Gracilaria.]

Question : How many among the following are mosses and liverworts respectively? Sphagnum, Riccia, Polysiphonia, Fucus, Marchantia, Sargassum, Funaria, Porphyra,Porella, Polytrichum

Question : How many among the following are haploid structure of bryophytes? Gametophyte, Zygote, Sporophyte, Seta, Rhizoid, Antheridium, Protonima, Antherozoid, Spore, NCC, Archegonium, Oosphere

Question : How many among the following are Ex-situ and In-situ conservation strategies respectively.

Question : How many among the following are diploid structures of gymnosperms?

Question : how many among the following are defining feature of living beings? ( reproduction, growth, metabolism, cellular organisation, consciousness)

Question : How many amino acids will be coded by following given or more than one cytosine represent the intron? AUG CCC CAC CAC UUA UAU AUA GGC GAC AAA GCG UUU CAU UAA

Question : How many amino acids are there in A and B sequence of human insulin respectively ?

Question : How many alleles are responsible for the following Starch synthesis in pea seeds.

Question : How many amino acids are involved in stabilising protein molcules?

Question : How many amino acids are arranged in the two chains of Insulin?

Question : How many amino acids (A) and peptide bonds (B) are present in a tetrapeptide?

Question : How many alleles determine the skin colour in human beings?

Question : How many additional ATPs are required in C_(4) plants as compared to C_(3) plants to synthesize 2 molecules of hexose sugar ?

Question : How many alleles are responsible for the following ABO blood group.

Question : How macro molecules like DNA and RNA play their crucial role in evolutionary history?

Question : How many abdominal ganglia are found in the nervous system of a cockroach.

Question : How long the Miller and Urey expriment was carried

Question : How LNG-20 act as contraceptive?

Question : How J-shape differ from S-shape curve ?

Question : How is ZIFT different from ICSI?

Question : How it was proved that DNA is the Genetic material ?

Question : How is Trypanosoma transmitted by infected to healthy persons?

Question : How is tissue culture method useful for crop improvement?

Question :How is the translation of mRNA terminated? Explain.

Question : How is the two stage process of protein synthesis advantageous?

Question : How is the ‘sixth episode of extinction’ of species on earth, now currently in progress, different from the five earlier episodes?. What is it due to? Explain the various causes that have brought about this difference.

Question : How is the scared grove important in conservation of biodiversity ?

Question :How is the progress being made in reproductive fields ?

Question : How is the presently occurring species extinction different from the earlier mass extinctions ?

Question : How is the herd size increased by Multiple Ovulation and Embryo Transfer (MOET) technology?

Question : How is the fertilization of amphibians differs from aves based site?