24277 + Interview Questions in Biology in Class 12 Page 130 InterviewSolution

6451.	Question : The enzyme which is used in PCR for the extension of primerOption1DNA ligase.Option2Restriction endonuclease.Option3RNA polymerase.Option4Taq polymerase.
Answer» DNA ligase Restriction endonuclease RNA polymerase Taq polymerase Answer :D

Discussion

6452.	Question : The enzyme which is used in joining the two DNA fragments in -vitro.
Answer» SOLUTION :DNA LIGASE.

Discussion

6453.	Question : Which of the following enzyme is used as a "clot buster" for removing clots from theblood vessels of patient who have undergone myocardial infaction leading to heart attack ?
Answer» Streptokinase Pectinase Protease Cyclosporin A Answer :A

Discussion

6454.	Question : The enzyme used to join the DNA fragments is
Answer» topoisomerase adenosine DEAMINASE DNA ligase DNA POLYMERASE ANSWER :C

Discussion

6455.	Question : The enzyme used in fractional differentiation is
Answer» TRYPSIN LIPASE actinase Both (a) and (C ) ANSWER :a

Discussion

6456.	Question : The enzyme used for cutting DNA segment in genetic engineering is :
Answer» ATPase Ligase DNA polymerase Restriction endonuclease Answer :B

Discussion

6457.	Question : The enzyme that is not produced in human albinos is
Answer» PHENYL ALANINE hydroxylase Tyrosinase Tyrosine kinase Protein Kinases Answer :B

Discussion

6458.	Question : The enzyme that used for cutting DNA IS DNA polymerase.
Answer» ANSWER :A::C::D

Discussion

6459.	Question : The enzyme that is not present in succus entericus is
Answer» Lipase Maltase Nucleases Nucleosidase ANSWER :C

Discussion

6460.	Question : The enzyme that is not found in a C_3plant is
Answer» RuBP Carboxylase PEP Carboxylase NADP reductase ATP synthase Answer :B

Discussion

6461.	Question : The enzyme that catalyses phosphorylation of the substrate without using ATP molecule is
Answer» GLYCERALDEHYDE 3-phosphate DEHYDROGENASE GLUCOSE 6-phosphotransferase PHOSPHOFRUCTOKINASE Pyruvatedikinase ANSWER :A

Discussion

6462.	Question :The enzyme that converts glucose into alcohol is
Answer» Lipase Zymase Diastase Invertase ANSWER :B

Discussion

6463.	Question : The enzyme that can replace the need of ATP phosphotructokinase is
Answer» Phosphoglycerokinase Atp kinase Phosphate dismutase Pyrophosphate fructokinase Solution :NA

Discussion

6464.	Question : The enzyme reverse transcriptase is used to obtain recombinant DNA.
Answer» ANSWER :CDNA

Discussion

6465.	Question : The enzyme responsible for biological nitrogen fixation is_______.
Answer» ANSWER :NITROGENASE

Discussion

6466.	Question : The enzyme required to catalyze the polymerisation of deoxynucleotides is :
Answer» DNA ligase trasacetylase `BETA`-galactosidase DNA polymerase Answer :D

Discussion

6467.	Question : The enzyme required for making genes from the mRNA is called ___________.
Answer» ANSWER :A::C

Discussion

6468.	Question : The enzyme referred to as Kornberg enzyme is _________________
Answer» DNA POLYMERASE I DNA polymerase II RNA polymerase Ligase Answer :A

Discussion

6469.	Question :The enzyme peptidyl transferase of prokaryotes resides in :
Answer» 50 S 40 S 30 S 60 S Answer :C

Discussion

6470.	Question : The enzyme present in RBC at higher concentration is …………..
Answer» DNA gyrase Pepsin DNA polymerase Carbonic anhydrase Answer :D

Discussion

6471.	Question : The ……………..enzyme is used to cut DNA at specific point.
Answer» DNA polymerase Alkaline phosphatase restriction endonuclease DNA ligase Answer :C

Discussion

6472.	Question : The enzyme pectinatse is produced by baeteria
Answer» Byssochlamuys fulvo Rhizobium MYCOBACTERIUM NONE of these Answer :A

Discussion

6473.	Question : The enzyme DNA polymerase in E.coli is a DNA dependent polymerase and also has the ability to proof-read the DNA strand being synthesised. Explain. Discuss the dual polymerase.
Answer» Solution :DNA POLYMERASE helps in the REPLICATION of DNA MOLECULES. DNA polymerase also helps in the PROOFREADING, if any error/mutation occurred during replication.

Discussion

6474.	Question : The enzymeDNAdependent RNA polymerase catalysesthe polymerisation reaction in ________ direction .
Answer» only `5' to 3'` only `3' to 5'` Both (a) and (b) None of these Solution :(a) : The two STRANDS have OPPOSITE polarity and the DNA-dependent RNA polymerase ALSO catalyse the polymerisation in only one DIRECTION, that is , `5' rarr 3'` the strand that has the sequence same as RNA (except thymineat the place of uracil ) is displaced during transcription. This strand (which does not code for ANYTHING ) is referred to as coding strand.

Discussion

6475.	Question : The enzyme diastase was identified by:
Answer» Payen and Persoz Waksman Christian Hansen Alexander Fleming Answer :A

Discussion

6476.	Question : The enzyme DNA polymerase was discovered by
Answer» KORNBERG OKAZAKI WATSON and CRICK STAHL and Meselson Answer :A

Discussion

6477.	Question : The enzyme complex formed by cascade reactions during blood clotting is called
Answer» thrombin fibrin thrombokinase thromboplastin Answer :C

Discussion

6478.	Question : The enzyme crucial for the immune system to function.
Answer» SOLUTION :ADENOSINE DEAMINASE (ADA)

Discussion

6479.	Question : The enzyme catalyses the synthesis of DNA from RNA in retroviruses is reverse polymerase.
Answer» True False Answer :Reversetranscriptase

Discussion

6480.	Question : The enzyme _____ breaks the covalent bonds in DNA and removes positive supercoiling during replication.
Answer» LIGASE TOPOISOMERASE POLYMERASE Resriction endonuclease ANSWER :B

Discussion

6481.	Question : The enzyme affecting the shelf life of Flavr savr tomato is :
Answer» GALACTOSIDASE TRANSACETYLASE PERMEASE Polygalacturonase Answer :D

Discussion

6482.	Question : The enzyme attached to RNA of HIV is…..
Answer» RNA polymerase Reverse transcriptase Primase Endonuclease Answer :A::C

Discussion

6483.	Question : The enzyme ATP synthase is located in____.
Answer» ANSWER :F1 PARTICLE

Discussion

6484.	Question : The enzyme affecting the shelf life of Flavr savr tomato is ……… .
Answer» galactosidase transacetylase permease polygalactouranase Answer :D

Discussion

6485.	Question : The enzymatic mixture for chemical isolation of protoplast is
Answer» a) 0.5% macrozyme, 2% onozuka cellulase, 13% maanitol B) 1.5% macrozyme, 0.5% onozuka cellulase, 12% sorbitol c) 2% macrozyme, 0.5% onozuka cellulase, 13% sorbitol d) 0.1% macrozyme, 2% onozuka cellulase, 15% sorbitol Answer :A

Discussion

6486.	Question : The entryof onlyone spermensuredinto anovumduringfertilizationin humans, Explain.
Answer» SOLUTION :REASON : Aspermcomesin CONTACT with thezona pellucidalayerof the ovumandinduceschanges in themembranethatblockthe entryofadditionalsperms .

Discussion

6487.	Question : The entrance to oviduct of a lady is blocked, she wants child. Which method will help her?
Answer» SOLUTION :The method of GIFT or GAMETE INTRA FALLOPIAN Transfer is the method that will help the lady.

Discussion

6488.	Question : The entire sequence of communities that successively change in a given area are called :
Answer» SERE Evolution Endemnismu CLIMAX COMMUNITY Solution :Primary SUCCESSION

Discussion

6489.	Question : The entire process of spermatogenesis takes about ............ days
Answer» a) 60 days B) 44 days c) 64 days d) 50 days Solution : 64 days

Discussion

6490.	Question : The ensheathing bands around muscles is
Answer» Tendon Fascia Peritoneum Ligaments Answer :A

Discussion

6491.	Question : The energy to allow chemogenic reactions came from
Answer» UV RAYS ELECTRIC DISCHARGE from lightning Cosmic rays All of the above ANSWER :D

Discussion

6492.	Question : The energy releasing process in which the substrate is oxidised without an external electron aceptor is called :
Answer» AEROBIC respiration Glycolysis Fermentation Photorespiration Answer :B

Discussion

6493.	Question : The energy source for the creation of the first organic compounds came from
Answer» ELECTRONIC discharge UV LIGHT HIGH temperature from VOLCANOES All of the above ANSWER :D

Discussion

6494.	Question : The energy -relasing metabolic process in which substrate is oxidized without an external electron acceptor, is called
Answer» GLYCOLYSIS Fermentaiton AEROBIC respiration Photorespiration ANSWER :B

Discussion

6495.	Question : The energy pyramid is always upright because the energy content
Answer» DECREASES in SUCCESSIVE trophic levels increases in successive trophic levels increases from the BASE to the top decreases from PRIMARY consumer to secondary consumer only Answer :A

Discussion

6496.	Question : "The energy flow in the ecosystem follows the second law of thermodynamics." Explain.
Answer» Solution :As PER second law of thermodynamics, at each step of ENERGY change (As per FIRST law, energy can be transformed or moved when energy is removed and energy is released in the form of heat and its any part is USED for the composition of tissues. The energy located in biomass is transformed into another trophic level. As per the rule of Lindman that `10%` part of stored energy PASSES from one trophic level to the another.

Discussion

6497.	Question : The endosymbiotic theory states that……,one piece of evidence supporting this theory is the fact that …
Answer» The first hereditary material was RNA, mitochondria and CHLOROPLASTS have heredity based on RNA The GENOMES of complex animals came in part from the genomes of INVADING pathogens, the human GENOME contains the complete genomes of 120 viruses and 10 bacteria Answer :C

Discussion

6498.	Question : The energy content in kcal/g of carbohydrate: protein: triglycerol respectively is approximately in the ratio of
Answer» 1:2:2 1:1:2 1:1:1 2:2:1 Answer :B

Discussion

6499.	Question : The energy enters the ecosystem through _____
Answer» consumers decomposers omnivores producers Answer :D

Discussion

6500.	Question : The ends of DNA fragments are sticky due to
Answer» UNPAIRED bases Calcium IONS Endonucleases FREE METHYLATION Solution :Unpaired bases

Discussion

Explore topic-wise InterviewSolutions in .

Question : The enzyme which is used in PCR for the extension of primerOption1DNA ligase.Option2Restriction endonuclease.Option3RNA polymerase.Option4Taq polymerase.

Question : The enzyme which is used in joining the two DNA fragments in -vitro.

Question : Which of the following enzyme is used as a "clot buster" for removing clots from theblood vessels of patient who have undergone myocardial infaction leading to heart attack ?

Question : The enzyme used to join the DNA fragments is

Question : The enzyme used in fractional differentiation is

Question : The enzyme used for cutting DNA segment in genetic engineering is :

Question : The enzyme that is not produced in human albinos is

Question : The enzyme that used for cutting DNA IS DNA polymerase.

Question : The enzyme that is not present in succus entericus is

Question : The enzyme that is not found in a C_3plant is

Question : The enzyme that catalyses phosphorylation of the substrate without using ATP molecule is

Question :The enzyme that converts glucose into alcohol is

Question : The enzyme that can replace the need of ATP phosphotructokinase is

Question : The enzyme reverse transcriptase is used to obtain recombinant DNA.

Question : The enzyme responsible for biological nitrogen fixation is_______.

Question : The enzyme required to catalyze the polymerisation of deoxynucleotides is :

Question : The enzyme required for making genes from the mRNA is called ___________.

Question : The enzyme referred to as Kornberg enzyme is _________________

Question :The enzyme peptidyl transferase of prokaryotes resides in :

Question : The enzyme present in RBC at higher concentration is …………..

Question : The ……………..enzyme is used to cut DNA at specific point.

Question : The enzyme pectinatse is produced by baeteria

Question : The enzyme DNA polymerase in E.coli is a DNA dependent polymerase and also has the ability to proof-read the DNA strand being synthesised. Explain. Discuss the dual polymerase.

Question : The enzymeDNAdependent RNA polymerase catalysesthe polymerisation reaction in ________ direction .

Question : The enzyme diastase was identified by:

Question : The enzyme DNA polymerase was discovered by

Question : The enzyme complex formed by cascade reactions during blood clotting is called

Question : The enzyme crucial for the immune system to function.

Question : The enzyme catalyses the synthesis of DNA from RNA in retroviruses is reverse polymerase.

Question : The enzyme _____ breaks the covalent bonds in DNA and removes positive supercoiling during replication.

Question : The enzyme affecting the shelf life of Flavr savr tomato is :

Question : The enzyme attached to RNA of HIV is…..

Question : The enzyme ATP synthase is located in____.

Question : The enzyme affecting the shelf life of Flavr savr tomato is ……… .

Question : The enzymatic mixture for chemical isolation of protoplast is

Question : The entryof onlyone spermensuredinto anovumduringfertilizationin humans, Explain.

Question : The entrance to oviduct of a lady is blocked, she wants child. Which method will help her?

Question : The entire sequence of communities that successively change in a given area are called :

Question : The entire process of spermatogenesis takes about ............ days

Question : The ensheathing bands around muscles is

Question : The energy to allow chemogenic reactions came from

Question : The energy releasing process in which the substrate is oxidised without an external electron aceptor is called :

Question : The energy source for the creation of the first organic compounds came from

Question : The energy -relasing metabolic process in which substrate is oxidized without an external electron acceptor, is called

Question : The energy pyramid is always upright because the energy content

Question : "The energy flow in the ecosystem follows the second law of thermodynamics." Explain.

Question : The endosymbiotic theory states that……,one piece of evidence supporting this theory is the fact that …

Question : The energy content in kcal/g of carbohydrate: protein: triglycerol respectively is approximately in the ratio of

Question : The energy enters the ecosystem through _____

Question : The ends of DNA fragments are sticky due to