24277 + Interview Questions in Biology in Class 12 Page 302 InterviewSolution

15051.	Question : In tropical plants like maize and sugarcane, during light independent reaction, Co_(2) is not directlyabsorbed by RuBisco.The follow another pathway. Explain that pathway.
Answer» Solution :(1) In tropical plants LIKE maize, sugar cane,Jowar, Amaranthus, Atriplex, etc, there exists an alternative pathway of photosynthesis. This pathway is called HSK pathway of photosynthesis named after its discoverers, viz.,Hatch, Slack and Kortschak. (2) HSK pathway occurs in low concentration of `CO_(2)` as low as 10 PPM (parts per million) in the atmosphere. (3) In HSK pathway, the initial product is a 4-carbon compound, i.e., oxaloacetic acid(oxalocetate). Therefore, this pathway of photosynthesis is also known as `C_(4)` pathway. (4) The various reactions that occur during HSK pathway are completed in two parts at two different sites which are as follows : (i) Reactions in mesophyll chloroplasts : (1) Initially, the atmospheric carbon dioxidewhich enters the mesophyll chloroplasts is accepted by PEPA (phosphoenol pyruvic acid) a 3-carbon compound to form a 4-C compound called oxaloacetic acid in the presence of water and PEP carboxylase enzyme as shown below : `underset((C_(3)))(PEPA)+CO_(2)+H_(2)O overset("PEP carboxylase")to underset((C_(4)))(OA A+H_(3)PO_(4))` (2) Oxaloacetic acid is reduced to malic acid (malate) by the enzyme malate dehydrogenase in the presence of `NADPH_(2)` or changed aspartic acid by AMINATION in the presence of `NADPH_(2)` and the enzyme transminase as shown below : `OA A+NADPH_(2) overset("Malate dehydrogenase")tounderset(("Malate"))("Malic acid")+NADP` `OA A+NADPH_(2)+NH_(3) overset("Transaminase")to underset(("Malate"))("Aspartic acid")+NADP+H_(2)O` (ii) Reactions in bundle sheath chloroplasts : (1) Malic or aspartic acid is then transported to the bundle sheath chloroplasts where it undergoes decarboxylation to form pyruvic acid (pyruvate) with the release of `CO_(2)` as shown below : `underset((4C))("Malic acid") +NADP to underset(("Pyruvate"))("Pyruvic acid") +underset((3C))(CO_(2)+)NADPH_(2)` (2) `CO_(2)` released in the above reaction is accepted by RuBP (second carbon acceptor). It enters the Calvin cycle and eventually forms glucose which is stored as STARCH in the bundle sheath chloroplasts. (3) Pyruvic acid which is formed due to decarboxylation of malic acid is transported to mesophyll cells where it undergoes phosphorylation to regenerate PEPA as shown below : `underset((3C))("Pyruvic")+ATP overset("Phosphorylation") to underset((3C)+iP)( PEPA +ADP )` (4) From the above account it is abivous that in `C_(4)` plants, `CO_(4)` is fixed twice in two different cells during the daytime. `CO_(2)` fixation in `C_(4) ` plants can occur at very low concentrantions of `CO_(2)` i.e., as low as 1-2 parts per million. `C_(4)` plants can carry on photosynthesis enven if the light intensity is high, temperature is high and the amount of available water is less.

Discussion

15052.	Question : In tropical deserts, the temperature goes
Answer» `GT 40^@C` `gt 60^@C` `gt 50^@C` `gt 70^@C` Answer :C

Discussion

15053.	Question : In trihybrid cross, the total number of genotypes formed are
Answer» 25 26 27 28 Answer :C

Discussion

15054.	Question : In Trapa, monarch xylem occurs in
Answer» STEM Root petiole lamina Answer :d

Discussion

15055.	Question : In transmination, if their are three carbons in amino acceptor (Keto acid), then find the number of carbon in new amino acid :-
Answer» '3' CARBON '5' carbon 2 carbon 6 carbon Answer :A

Discussion

15056.	Question : In translation, amino acyle tRNA synthetase recognises the correct amino acid on the basis of
Answer» COO group NH_(3) group H-atom R-group Solution :The enzyme AMINOACYL tRNA synthetase read the geneticcode present on the MRNA and ACCORDINGLY indentify the AMINO acids and attach with them on their functional group ®

Discussion

15057.	Question : In transgenics,the expression of transgene in the target issue is known by
Answer» Enhancer Transgene Promoter Reporter Answer :D

Discussion

15058.	Question : In transgenics, the expression of transgene in the target tissue is known by
Answer» Transgene Enhancer Promoter REPORTER SOLUTION :Reporter

Discussion

15059.	Question : In transgenics, the expression of transgene in the A target tissue is known by………………
Answer» REPORTER Transgene ENHANCER PROMOTER SOLUTION :Reporter

Discussion

15060.	Question :In transgenics, expression of transgene in target tissue is determined by
Answer» ENHANCER Transgene Promoter REPORTER ANSWER :D

Discussion

15061.	Question : In transgenics, the expression of transgene in the target tissue is known by:
Answer» Enhancer Transgene Promoter Reporter Answer :D

Discussion

15062.	Question : In transgenicsexpression of transgene in target tissue is determined by
Answer» PROMOTER REPORTER ENHANCER Transgene Answer :B

Discussion

15063.	Question : In transcription why only one mRNA is synthesized from two DNA chains ?
Answer» One MRNA is synthesized by combined EFFECT of two chains. Both DNA chains act as DNA template Out of two DNA chains, one acts as a template CHAIN Both the DNA chains BECOME united and MAKE one Solution :Out of two DNA chains, one acts as a template chain

Discussion

15064.	Question : In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA)is transcribed by
Answer» RNA polymerase I RNA polymerase II RNA polymerase III all of these. Solution :(B) : Eukaryotes have three RNA (28S, 18S and 5.8S) whereas RNA polymerase II is localised in the nucleoplasm and used for hnRNA, mRNA and RNA polymerase IIIis localised in the nucleus, possibly the nucleolar-nucleoplasm interface and transcribes for tRNA , 5S RRNA and SNRNAS.

Discussion

15065.	Question : In transcription unit, the promoter sequence is located
Answer» Towards 5' end upstream of the STRUCTURAL gene Towards 5' end DOWNSTREAM of the structural gene Towards 3' end upstream of the structural gene Towards 3' end downstream of the CODING strand Answer :A

Discussion

15066.	Question : In tracing the path of sperm from testis to outsdie, you wold mention the vasa deferentia before the
Answer» TESTES epididymide urethra uterus Answer :B

Discussion

15067.	Question : In transcription in eukaryotesheterogeneous nuclear RNA (hnRNA) IS transcribed by
Answer» RNA POLYMERASE I RNA polymeraseII RNA polymeraseIII All of these Answer :B

Discussion

15068.	Question : In tomato, three pairs of genes are located on a chromosome of these each two are linked. There is 8% recombination between the genes for tallness (T) and smooth surface(S) . There is 20% recombination between tallness and oval-shape fruit and smooth fruit surface. The correct sequence of the genes is
Answer» S-O-T S-T-O T-S-O O-T-S Answer :C

Discussion

15069.	Question : In tobacco plants, a nematode Meloidegyne incognitia infects the roots of tobacco plants and causes a great reduction in yield. To prevent this nematode infection a new method was introduced called as RNA inter ference (silencing of specific (RNA). Briefly explain this method done in tobacco plants using Agrobacterium vectors.
Answer» Solution :The NEMATODE specific genes were introduced into the host plant USING Agrobacterium vectors. The introduction of DNA was such that it produced both sense and anti-sense RNA in the host cells. These two RNA.s together form DOUBLE stranded RNA that initiated RNAi (RNA interference) which SILENCED the specific mRNA of the nematode. THUS parasite could not survive in the host.

Discussion

15070.	Question : In tissue, culture, shoot and root regenerations are generally controlled by
Answer» CHANGING the AMOUNT of gibberellin Auxin-cytokinin balance Ethylene-ABA balance The PROCESS of subculturing Answer :B

Discussion

15071.	Question : In tissue culture roots can be induced by
Answer» LOWER CONCENTRATION of CYTOKININ and HIGHER concentration of AUXINS Only cytokinin and no auxins No cytokinin and only auxins Higher concentration of cytokinin and lower concentration of auxins Answer :A

Discussion

15072.	Question : In tissue culture roots can be induced by :-
Answer» LOWER CONCENTRATION of CYTOKININ and HIGHER concentration of auxins Only cytokinin and no auxins No cytokinin and only auxins Higher concentration of cytokinin and lower concentration of auxins Answer :A

Discussion

15073.	Question : In Ti-plasmid, which of the following is removed:
Answer» AUXIN gene Virulent gene CYTOKININ gene Auxin & cytokinin gene Answer :B

Discussion

15074.	Question : In tissue culture embryoids are formed from pollen grains due to
Answer» TEST tube CULTURE DOUBLE FERTILISATION Cellular totipotency Organogenesis Answer :A

Discussion

15075.	Question : In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process of osmosis stops ?
Answer» The level of SOLUTION in thistle funnel RISES up The level of solution in thistle funnel lowers The level of solution in BEAKER lowers The level of solution remains UNAFFECTED in beaker Answer :D

Discussion

15076.	Question : In thistle funnel experiment
Answer» WATER potential in thistle funnel first decreases and then increases Water potential in thirstle funnel first increases and LATER decreases Water potential in the BEAKER initially INCREASE and later decreases Water potential in the beaker initially decreases Answer :A

Discussion

15077.	Question : In this process , genital duct is tied.
Answer» STERILIZATION MALE / VASECTOMY TUBECTOMY All OFTHE given Answer :D

Discussion

15078.	Question : In this, seeds do not have their
Answer» CALOTROPIS Drumstick ALSTONIA Cotton Answer :B

Discussion

15079.	Question : In this pedigree if III–2 married to a normal female, what will be the chances of first child being a diseased child ?
Answer» 0.25 0.5 1 Both (2) & (3) ANSWER :D

Discussion

15080.	Question : In this given pedigree what will be the nature of inheritance :
Answer» X-linked dominant Y-linked Autosomal dominant Autosomal recessive Answer :D

Discussion

15081.	Question : In these plant artificial vegetative reproduction is possible through cutting of root (A) Rose and hibiscus (B) Tamarind and chrysanthemum (C)Lemon and rose (D) Lemon and tamarind
Answer» ROSE and HIBISCUS tamarid and CHRYSANTHEMUM LEMON and rose lemon and tamarid ANSWER :D

Discussion

15082.	Question : In his classic experiments on Pea plants, Mendel did not use
Answer» Flowering position Seed colour POD LENGTH Seed SHAPE Answer :C

Discussion

15083.	Question : In these plants artificial vegetative reproduction is possible through cuttings of root :
Answer» LEMON and rose Rose and Hibiscus Tamarind and Chrysanthemum Lemon and tamarind Answer :D

Discussion

15084.	Question : In these aspects, explain biodiversity hot spots with example. Give importance to reccent issues with regard to western ghats.
Answer» Solution :Biodiversity hot spots are regions of hogh level of species richness and high degree of ENDEMISM. WESTERN Ghats are INCLUDED in hot spots. The RECENT issue about Western Ghats is the Gadgil Report about Western Ghat conservation.

Discussion

15085.	Question : In thefollowing pairs where do you get lignin in both the element
Answer» TRACHEID and collenchyma Sclerenchyma and SIEVE tube Sclerenchyma and tracheids Parenchyma and endodermis Answer :C

Discussion

15086.	Question : In their side by side experiments Hershy and Chase incorporated ""^(35)S into
Answer» BACTERIAL DN Protein CAPSID of phage Cytoplasm of bacteria Phage DNA Answer :B

Discussion

15087.	Question : In the Z-scheme of e^(-)transport , PSII and PSI are connected by
Answer» NADPH ATP photos Electron TRANSPORT chain Answer :D

Discussion

15088.	Question : In the year 1984, the Bhopal gas tragedy was caused by the leakage of :
Answer» `CO_2` `SO_2` `NO_2` METHYLE isocyanate Answer :D

Discussion

15089.	Question : In the year 1963, the two enzymes responsible for restricting the growth of bacteriophage in E.coli were isolated. One of these added methyl groups to host DNA, while the other cut DNA. The latter was called
Answer» restriction ENDONUCLEASE restriction exonuclease Type III restriction enzyme PLASMID ANSWER :A

Discussion

15090.	Question : In the treatment of sewage, primary treatment is used to remove
Answer» Pesticides DDT and pathogen Turbidity in WASTE water Floating DEBRIS and grit Answer :D

Discussion

15091.	Question :In the thermodynamic terminology the osmotic pressure is equivalent to ______ potential concept but opposite in sign of its value.
Answer» ANSWER :OSMOTIC

Discussion

15092.	Question : In the textbook you came across "Three Mile Island and Chernobyl disasters associated with accidental leakage of radioactive wastes." In India we had Bhopal gas tragedy. It is associated with which of the following?(A) CO_(2)(B) Methyl Isocyanate(C) CFC(D) Methyl Cyanate
Answer» `CO_(2)` Methyl Isocyanate CFC Methyl CYANATE Solution :In the textbook we came across THREE Mile Island and Chernobyl disasters associated with accidental leakage of radioactive wastes. In India we had Bhopal gas tragedy. It is associated with the leakage of Methyl Iso-Cyanate (MIC). This chemical tragedy occurred on the night of 2-3 DECEMBER 1984 at union carbide India limited pesticide plant in Bhopal, MP, India. In this tragedy Approximately 3787 DIED.

Discussion

15093.	Question : In the textbook you came across Three Mile Island and Chernobyl disasters associated with accidental leakage of radinactive wastes. In India we had Bhopal gas tragedy. It is associated with which of the following?
Answer» `CO_(2)` Methyl Isocyanate CFC's Methylcyanate Solution :In the NIGH of December `2-3`, 1984, gas clouds of methyl iso-cyanate (MIC) are formed in Bhopal, Madhya Prades. The cause was leakage from the pesticide PLANT in union carbide India limited. The gas had acute health effects as WELL as long term effects. The leaked acuted effects LEAD to the death of more than 3000 people. Acute effects included SUFFOCATION, vomitinig, pulmonary oedema as well as cerebal oedema.

Discussion

15094.	Question : In the test tube baby programme,the zygote or early embryos are transferred into the female. Name the method of transferring in the following stages.Embryo with more than 8 blastomeres
Answer» SOLUTION :IUI -INTRA UTERINE TRANSFER

Discussion

15095.	Question : In the test tube baby programme,the zygote or early embryos are transferred into the female. Name the method of transferring in the following stages.Embryo upto 8 blastomeres
Answer» SOLUTION :ZIFT -Zygote INTRA Fallopian TRANSFER

Discussion

15096.	Question : In the technique RNA interferance the silencing is done to terminate the function of
Answer» HN RNA m RNA sn RNA All of the above Answer :B

Discussion

15097.	Question : In the table given below, some of the crop plants, their diseases and the pathogens are given. Match these three columns and identify the correct choice.
Answer» A-III-2, B-I-4, C-IV-1 D-II-3 A-I-2, B-III-4, C-II-3, D-IV-1 A-IV-3, B-I-2, C-III-1 D-II-4 A-II-1, B-IV-3 C-I-2, D-III-4 Answer :A

Discussion

15098.	Question : In the synthesis of which of the following the DNA molecule is not directly involved
Answer» MRNA molecule another DNA molecule tRNA molecule protein molecule Answer :D

Discussion

15099.	Question : In the stomach gastrc acid is secretd by the
Answer» GASTRIN SECRETING CELLS Parietal cells Peptic cells Acidic cells ANSWER :B

Discussion

15100.	Question : In the snail population described above, what is the allic frequency of B?
Answer» 0.45 0.55 0.75 0.8 Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : In tropical plants like maize and sugarcane, during light independent reaction, Co_(2) is not directlyabsorbed by RuBisco.The follow another pathway. Explain that pathway.

Question : In tropical deserts, the temperature goes

Question : In trihybrid cross, the total number of genotypes formed are

Question : In Trapa, monarch xylem occurs in

Question : In transmination, if their are three carbons in amino acceptor (Keto acid), then find the number of carbon in new amino acid :-

Question : In translation, amino acyle tRNA synthetase recognises the correct amino acid on the basis of

Question : In transgenics,the expression of transgene in the target issue is known by

Question : In transgenics, the expression of transgene in the target tissue is known by

Question : In transgenics, the expression of transgene in the A target tissue is known by………………

Question :In transgenics, expression of transgene in target tissue is determined by

Question : In transgenics, the expression of transgene in the target tissue is known by:

Question : In transgenicsexpression of transgene in target tissue is determined by

Question : In transcription why only one mRNA is synthesized from two DNA chains ?

Question : In transcription in eukaryotes, heterogenous nuclear RNA (hnRNA)is transcribed by

Question : In transcription unit, the promoter sequence is located

Question : In tracing the path of sperm from testis to outsdie, you wold mention the vasa deferentia before the

Question : In transcription in eukaryotesheterogeneous nuclear RNA (hnRNA) IS transcribed by

Question : In tissue, culture, shoot and root regenerations are generally controlled by

Question : In tissue culture roots can be induced by

Question : In tissue culture roots can be induced by :-

Question : In Ti-plasmid, which of the following is removed:

Question : In tissue culture embryoids are formed from pollen grains due to

Question : In thistle funnel experiment, what will occur if sugar solution is added to beaker, after the process of osmosis stops ?

Question : In thistle funnel experiment

Question : In this process , genital duct is tied.

Question : In this, seeds do not have their

Question : In this pedigree if III–2 married to a normal female, what will be the chances of first child being a diseased child ?

Question : In this given pedigree what will be the nature of inheritance :

Question : In these plant artificial vegetative reproduction is possible through cutting of root (A) Rose and hibiscus (B) Tamarind and chrysanthemum (C)Lemon and rose (D) Lemon and tamarind

Question : In his classic experiments on Pea plants, Mendel did not use

Question : In these plants artificial vegetative reproduction is possible through cuttings of root :

Question : In these aspects, explain biodiversity hot spots with example. Give importance to reccent issues with regard to western ghats.

Question : In thefollowing pairs where do you get lignin in both the element

Question : In their side by side experiments Hershy and Chase incorporated ""^(35)S into

Question : In the Z-scheme of e^(-)transport , PSII and PSI are connected by

Question : In the year 1984, the Bhopal gas tragedy was caused by the leakage of :

Question : In the year 1963, the two enzymes responsible for restricting the growth of bacteriophage in E.coli were isolated. One of these added methyl groups to host DNA, while the other cut DNA. The latter was called

Question : In the treatment of sewage, primary treatment is used to remove

Question :In the thermodynamic terminology the osmotic pressure is equivalent to ______ potential concept but opposite in sign of its value.

Question : In the textbook you came across "Three Mile Island and Chernobyl disasters associated with accidental leakage of radioactive wastes." In India we had Bhopal gas tragedy. It is associated with which of the following?(A) CO_(2)(B) Methyl Isocyanate(C) CFC(D) Methyl Cyanate

Question : In the textbook you came across Three Mile Island and Chernobyl disasters associated with accidental leakage of radinactive wastes. In India we had Bhopal gas tragedy. It is associated with which of the following?

Question : In the test tube baby programme,the zygote or early embryos are transferred into the female. Name the method of transferring in the following stages.Embryo with more than 8 blastomeres

Question : In the test tube baby programme,the zygote or early embryos are transferred into the female. Name the method of transferring in the following stages.Embryo upto 8 blastomeres

Question : In the technique RNA interferance the silencing is done to terminate the function of

Question : In the table given below, some of the crop plants, their diseases and the pathogens are given. Match these three columns and identify the correct choice.

Question : In the synthesis of which of the following the DNA molecule is not directly involved

Question : In the stomach gastrc acid is secretd by the

Question : In the snail population described above, what is the allic frequency of B?