24277 + Interview Questions in Biology in Class 12 Page 222 InterviewSolution

11051.	Question : One of the aspect is not a feature of genetic code?
Answer» (a) SPECIFIC (b) DEGENERATE (c) UNIVERSAL (d) AMBIGUOUS Solution :Ambiguous

Discussion

11052.	Question : One of the applications of biotechnology is the production of insect resistant crop plants." Justify the statement with reference to Bt-cotton.
Answer» Solution :The "cry.GENE-.crylAc. and .crylAb. from Bacillus thuringiensis coding for the TOXINS are transferred to COTTON plants. The proteins ENCODED by these genes control the cotton bollworms. These Bt cotton plants express the Bt toxin gene by produceings the toxin that provides insect resistance. Bt toxin is a toxic insecticidal protein formed in the form of protein crystals that kills certain insects. It exists as inactive protoxin once an insect ingests the inactive toxin. It is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals. The ACTIVATED toxin binds to the surface of epithelial cells of the midgut and creates pores which causes cell swelling and lysis and finally the death of the insect.

Discussion

11053.	Question : One of the applications of biotechnology is to get Pest resistance plants. Justify the statement with reference to Bt.Cotton.
Answer» Solution :Some strains of Bacillus thuringiensis produce protein crystals, that kill insects Lepidopterans, coleopterans and Dipterans. Protein crystals formed during certain phase of their growth. The cry GENE, cry IAC and Cry IIA6 from B.thuringenesis coding for the toxins are transferred to cotton plants BOLLWORMS. Bt cotton plants express the Bt TOXIN gene by producing foxin that provides insect resistance. Bt toxin protein exists as an inactive prototoxins. Insect ingest the inactive toxin, converts to active toxin at alkaline pH of gut of inseçt which solubilise the crystals. Toxin binols to SURFACE of midgut epithelial cells create porus that cause cell swelling and lysis and EVENTUALLY cause death of insect.

Discussion

11054.	Question : One of the applications of biotechnology is 'gene therapy" to treat a person born with a hereditary disease. (i) What does "gene therapy " mean ?
Answer» Solution :(i) Gene therapy is the process in which the defective GENES are replaced with normal genes leading to the expression of PROPER phenotype. (ii) SCID (Severe Combined IMMUNO Deficiency) disease was the first disease treated by using gene therapy. (iii) There are two strategies involved in gene therapy namely, Gene augmentation therapy, which involves INSERTION of DNA into the genome to replace the missing gene product, and Gene inhibition therapy, which involves insertion of the anti sense gene which inhibits the expression of the DOMINANT gene.

Discussion

11055.	Question : One of the advantages of developing transgenic mice is that it is very useful:
Answer» To STUDY vaccine SAFETY In producing new varieties ofmice In developinga SHOW pieceexample In GENE targeting Answer :A

Discussion

11056.	Question : One of the applicationof biotechnology is to get pest resistant plants - " Justify the statement with referenceto Bt cotton".
Answer» SOLUTION :REFER BT COTTON of this CHAPTER.

Discussion

11057.	Question : One of the legal methods of birth control is
Answer» ABORTION by taking an APPROPRIATE medicine By abstaining from COITUS from DAY 10 to 17 of the menstrual cycle By having coitus at the time of day break By a premature EJACULATION during coitus. Answer :A

Discussion

11058.	Question : One of the a dvantage of developing transgenicmice is that it is useful
Answer» To study VACCINE safety In PRODUCING new varieties of MICE In developing a show PIECE example In gene targeting Solution :To study vaccine safety

Discussion

11059.	Question : One myosin filament in the myofibril of skeletal muscle fibre is surrounded by how many actin filaments ?
Answer» Two Four Six Three Answer :C

Discussion

11060.	Question : One molecule of pyruvic acid produces_____ molecules of CO_(2) in mitochondrion
Answer» 3 2 4 6 Answer :A

Discussion

11061.	Question : One molecule of insulin contains :
Answer» 30 AMINO acid 41 amino acid 51 amino acid 70 amino acid Answer :C

Discussion

11062.	Question : One molecule of glucose requires 2 ATP to get phosphorylated to form Fructose 1-6 Biphosphate in glycolysis. How many ATP are used in the same process if the substrate is fructose?
Answer» 1 2 4 3 Answer :A

Discussion

11063.	Question :One molecule of glucose in Calvin cycle is formed from:
Answer» 6`CO_2`+ 12ATP 6`CO_2`+ 30ATP+12NADPH 6`CO_2`+ 18ATP+12NADPH 6`CO_2`+18ATP+30NADPH Answer :C

Discussion

11064.	Question : One mole of glucose on complete oxidation in aerobic respiration yields ?
Answer» 2870 KJ 5000 KJ 686 KJ 1870 KJ Answer :A

Discussion

11065.	Question : One mole of glucose on metabolism liberates how many kilocalories of energy ?
Answer» 180 80 160 380 Answer :D

Discussion

11066.	Question : One hormone helps in ripening of fruits while the other-stimulates closure of stomata. These are respectively:
Answer» Abscisic ACID and auxin Ethylene and abscisic acid Abscisic acid and ethylene Ethylene and GIBBERELLIC acid Answer :B

Discussion

11067.	Question : One map unit in a genetic map is calle _____
Answer» centimorgan centi METER MILLIMETER meter ANSWER :A

Discussion

11068.	Question :One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as
Answer» (a)`N_2O` and `CO_2` (B) CFCS and `N_2O` (C) `CH_4` and `CO_2` (d) `CH_4` and `CFCs ` SOLUTION :CFCs and `N_2O`

Discussion

11069.	Question : One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as
Answer» `N_(2)O` and `CO_(2)` CFCs and `N_(2)O` Methaneand CFCs CFCs and `CO_(2)` Answer :B

Discussion

11070.	Question : One gene one polypeptide theory can be explained by:-
Answer» alkaptonuria phenylketonuria sickle CEL anaemia all of these Answer :D

Discussion

11071.	Question : One glucose on complete oxidation yields 36 ATP . During this oxidation of glucose , what is the contribution of the Krebs cycle via oxidative phosphorylation ?
Answer» 11 ATP 12 ATP 22 ATP 24 ATP Answer :C

Discussion

11072.	Question : One gene-one polypeptide hypothesis was proposed by
Answer» LINUS Pauling V Ingram Beadle and Tautum Brenner ANSWER :B

Discussion

11073.	Question : One gene-one enzyme relationship was established for the first time in
Answer» SALMONELLA typhimurium Escherichia coli Diplococcus pneumoniae Neurospora crassa Answer :D

Discussion

11074.	Question : One gene - One enzymehypothesis was postulated by :
Answer» A.garrod Beadle and tatum R.Franklin Hershey and chase Answer :B

Discussion

11075.	Question : One gene-one enzyme hypothesis has been changed to .................... .
Answer» SOLUTION :ONE gene-one POLYPEPTIDE CHAIN PRINCIPLE

Discussion

11076.	Question : One gene-one enzyme concept is now more accurately referred to as one .................. one ................... concept.
Answer» SOLUTION :GENE, POLYPEPTIDE

Discussion

11077.	Question : One gene - one enzyme concept is now moreaccurately referredto as one_____ one _____ concept.
Answer» ANSWER :GENE , POLYPEPTIDE

Discussion

11078.	Question : One chromosome contains one molecule of DNA. In eukaryotes the length of the DNA molecule is enormously large. Explain how such a long molecule fits into the tiny chromosomes seen at Metaphase.
Answer» Solution : DNA is packaged in the cell in the following MANNER (a) As nucleosome CONSISTS of Histone octamer AROUND which the negatively charged DNA is wrapped around to form a nucleosome. A typical nucleosome contains 200 bp of DNA helix. (b) Repeated units of nucleosomes then form chromatin in a nucleus).The nucleosomes represent the "Beads on String structure as seen in electron microscopic picture (c) These are then further coiled and condensed at metaphase stage to form CHROMOSOMES. (d) For PACKAGING of chromatin at higher level, non histone proteins are required

Discussion

11079.	Question : One child is haenophilic (sex-linked trait )whereas his fraternal twin bother is normal .Which one of the following infomations is most apporpriated ?
Answer» The HAEMOPHILIC child is male The child is a monozygotic TWIN The mother must have been heterozygous The other child is a FEMALE and the father is haemophilic is : ANSWER :C

Discussion

11080.	Question : One can notice large holes in Swiss cheese . Which bacterium is responible for these holes . What are these holes due to ?
Answer» Solution :PROPIONIBACTERIUM shermanii. The holes are due to the formation of large amount of CARBON -di OXIDE during fermentation .

Discussion

11081.	Question : One centimorgan is equal to recombination frequency of
Answer» 1 0.1 10 0.01 Answer :D

Discussion

11082.	Question : One bacterium which has extensively used in genetic engineering work in plant is ,
Answer» AGROBACTERIUM tumfaciens Bacillus coagulens Xanthomonas citri Clostridium spectium Answer :A

Discussion

11083.	Question : One among the contraceptive methods is peculiar. Find the odd out What is common among Other ? a)Periodic abstinenceb)Coitus interruptusc)Lactational Amenorrhead)IUDs
Answer» PERIODIC ABSTINENCE COITUS interruptus Lactational Amenorrhea IUDs Answer :D

Discussion

11084.	Question : One among the contraceptive method is peculiar.Find the odd one. What is common among others?
Answer» PERIODIC abstinence Coitus interruptus Lactational amenonnea IUD's Answer :D

Discussion

11085.	Question : Ond day, Ramesh was standing in the kitchen with his mother who was cutting onions for making vegetable. He observed that in someof the onion bulbs, green leaves appeared on the upper end and roots on the lower end . Next day, he shared his observations with hsi class teacher and asked him the following questions. (i) What is the name of this type of propagation ? (ii)Can this mathod be used for raising onion plants at home also?
Answer» Solution : (i) This type ofpropagations KNOW as vegetative PROPAGATION. (II) Yes, we can raise ONIONS in our kitchen garden by this method.

Discussion

11086.	Question : One adavantage of Cleistogamy is
Answer» a)it leads to greater genetic diversity b)seed dispersal is more efficient and widespread c)seed SET is not DEPENDENT on pollnators. d)each visit of a POLLINATOR results in transfer of HUNDREDS of pollen grains Answer :C

Discussion

11087.	Question : Oncogenes were discovered by :
Answer» Fleming Rowland Pruessiner Bishop and Vermus Answer :D

Discussion

11088.	Question : On which technique DNA fingerprinting is based?
Answer» SOLUTION :DNA fingerprinting technique is based on identification of nucleotide SEQUENCES present in the DNA molecule.

Discussion

11089.	Question : On which Hugo de vries worked and gave anidea about mutation ?
Answer» EVENING PRIMROSE MORNING primrose Primrose All of these SOLUTION :Evening primrose

Discussion

11090.	Question : On which mediator host, the microfilaria enters?
Answer» ANOPHELES Microspore Trichophyton CULEX fatigon Solution : Culex fatigon

Discussion

11091.	Question : On which day, world population touched 5th billion?May 11, 1985July 11, 1986May 11, 1987July 11, 1987
Answer» MAY 11, 1985 JULY 11, 1986 May 11, 1987 July 11, 1987 Answer :D

Discussion

11092.	Question :On which days of there menstrual cycle is ovulation expected ?
Answer» `10^("th") - 30^("th")` `1^("ST") - 10^("th")` `10^("th") - 17^("th")` `18^("th") - 25^("th")` Answer :C

Discussion

11093.	Question : On which day of normal menstrual cycle, ovulation occurs?
Answer» ANSWER :14TH DAY

Discussion

11094.	Question : On which date, World Meteorological Day was observed?
Answer» 23RD MARCH 22ND March 21ST March 20TH March Answer :A

Discussion

11095.	Question : On which chromosome does HBA 1gene and HBB genes are located?
Answer» Solution :HBAI GENE is LOCATED on chromosome 16. HBB gene is located on chromosome 11.

Discussion

11096.	Question : On which date BHARAT STAGE III was implemented in the city of Ahmedabad and Surat ?(A) April 1, 2008(B) April 1, 2007(C) April 1, 2006(D) April 1, 2005
Answer» APRIL 1, 2008 April 1, 2007 April 1, 2006 April 1, 2005 ANSWER :D

Discussion

11097.	Question : On which chromosome of man holandric genes occur ?
Answer» ANSWER :Y-chromosome

Discussion

11098.	Question : On which chromosome of a haemophilic man the gene for haemophilia is present ?
Answer» ANSWER :X-Chromosome

Discussion

11099.	Question : How are antibiotics classified ?
Answer» Solution :The ANTIBODIES are CLASSIFIED into five major categories,based on their physiological and biochemical properties.They are IgG(gamma),IGN(mu),IgA(Alpha),IGD(delta) and IGE(epsilon).

Discussion

11100.	Question : On which bacteria Griffith conducted transformation experiment?
Answer» SOLUTION :STREPTOCOCCUS PNEUMONIAE

Discussion

Explore topic-wise InterviewSolutions in .

Question : One of the aspect is not a feature of genetic code?

Question : One of the applications of biotechnology is the production of insect resistant crop plants." Justify the statement with reference to Bt-cotton.

Question : One of the applications of biotechnology is to get Pest resistance plants. Justify the statement with reference to Bt.Cotton.

Question : One of the applications of biotechnology is 'gene therapy" to treat a person born with a hereditary disease. (i) What does "gene therapy " mean ?

Question : One of the advantages of developing transgenic mice is that it is very useful:

Question : One of the applicationof biotechnology is to get pest resistant plants - " Justify the statement with referenceto Bt cotton".

Question : One of the legal methods of birth control is

Question : One of the a dvantage of developing transgenicmice is that it is useful

Question : One myosin filament in the myofibril of skeletal muscle fibre is surrounded by how many actin filaments ?

Question : One molecule of pyruvic acid produces_____ molecules of CO_(2) in mitochondrion

Question : One molecule of insulin contains :

Question : One molecule of glucose requires 2 ATP to get phosphorylated to form Fructose 1-6 Biphosphate in glycolysis. How many ATP are used in the same process if the substrate is fructose?

Question :One molecule of glucose in Calvin cycle is formed from:

Question : One mole of glucose on complete oxidation in aerobic respiration yields ?

Question : One mole of glucose on metabolism liberates how many kilocalories of energy ?

Question : One hormone helps in ripening of fruits while the other-stimulates closure of stomata. These are respectively:

Question : One map unit in a genetic map is calle _____

Question :One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as

Question : One green house gas contributes 14% of total global warming and another contributes 6%. These are respectively identified as

Question : One gene one polypeptide theory can be explained by:-

Question : One glucose on complete oxidation yields 36 ATP . During this oxidation of glucose , what is the contribution of the Krebs cycle via oxidative phosphorylation ?

Question : One gene-one polypeptide hypothesis was proposed by

Question : One gene-one enzyme relationship was established for the first time in

Question : One gene - One enzymehypothesis was postulated by :

Question : One gene-one enzyme hypothesis has been changed to .................... .

Question : One gene-one enzyme concept is now more accurately referred to as one .................. one ................... concept.

Question : One gene - one enzyme concept is now moreaccurately referredto as one_____ one _____ concept.

Question : One chromosome contains one molecule of DNA. In eukaryotes the length of the DNA molecule is enormously large. Explain how such a long molecule fits into the tiny chromosomes seen at Metaphase.

Question : One child is haenophilic (sex-linked trait )whereas his fraternal twin bother is normal .Which one of the following infomations is most apporpriated ?

Question : One can notice large holes in Swiss cheese . Which bacterium is responible for these holes . What are these holes due to ?

Question : One centimorgan is equal to recombination frequency of

Question : One bacterium which has extensively used in genetic engineering work in plant is ,

Question : One among the contraceptive methods is peculiar. Find the odd out What is common among Other ? a)Periodic abstinenceb)Coitus interruptusc)Lactational Amenorrhead)IUDs

Question : One among the contraceptive method is peculiar.Find the odd one. What is common among others?

Question : One adavantage of Cleistogamy is

Question : Oncogenes were discovered by :

Question : On which technique DNA fingerprinting is based?

Question : On which Hugo de vries worked and gave anidea about mutation ?

Question : On which mediator host, the microfilaria enters?

Question : On which day, world population touched 5th billion?May 11, 1985July 11, 1986May 11, 1987July 11, 1987

Question :On which days of there menstrual cycle is ovulation expected ?

Question : On which day of normal menstrual cycle, ovulation occurs?

Question : On which date, World Meteorological Day was observed?

Question : On which chromosome does HBA 1gene and HBB genes are located?

Question : On which date BHARAT STAGE III was implemented in the city of Ahmedabad and Surat ?(A) April 1, 2008(B) April 1, 2007(C) April 1, 2006(D) April 1, 2005

Question : On which chromosome of man holandric genes occur ?

Question : On which chromosome of a haemophilic man the gene for haemophilia is present ?

Question : How are antibiotics classified ?

Question : On which bacteria Griffith conducted transformation experiment?

Question : One gene - one enzyme concept is now moreaccurately referredto as one_ one _ concept.