24277 + Interview Questions in Biology in Class 12 Page 293 InterviewSolution

14601.	Question : Lac operon is repressible system.
Answer» True False Answer :INDUCIBLE

Discussion

14602.	Question : Infections or diseases which are transmitted through sexual intercourse are collectively called sexually transmitted infections (STI) or venereal diseases (VD) or reproductive tract infections (RTI). Except forhepatitis-B, ——————- and HIV infections, other diseases are completely curable if detected early and treated properly.
Answer» GENITAL WARTS syphilis gonorrhoea genital HERPES ANSWER :C

Discussion

14603.	Question : Infection of Ascaris usually occurs by
Answer» DRINKING water containing egg of ASCARIS eating IMPERFECTLY COOKED pork tse-tse fly mosquito bite Solution :drinking water containing egg of Ascaris

Discussion

14604.	Question : lac is the secretion of
Answer» Epidermal glands Hypodermal glands SALIVARY glands Anal glands ANSWER :A

Discussion

14605.	Question : Infection of Ascaris usually occurs by:
Answer» DRINKING water containing EGGS of ASCARIS Tse-tse fly Eating IMPERFECTLY cooked PORK Mosquito bite Answer :A

Discussion

14606.	Question : Lac from Lac insects (Laccifer) is :-
Answer» SECRETORY substance Heamolymph Fecal matter Excretory matter Answer :A

Discussion

14607.	Question : Infectionin whichcapulespassoutof thebodythroughfaeces andurineis
Answer» CYSTICERCOSIS SCHISTOSOMIASIS Taeniasis Both B andC Answer :b

Discussion

14608.	Question : Labia - Clitoris
Answer» Solution :Labia : Itis external GENITAL in FEMALE. It possesses structure like labia minora. Clitoris : It is LOCATED below labia minora, folded structure. It is a small FINGER like structure. It has erectile tissue.

Discussion

14609.	Question : Infection of Ascariasis occur due to ……..
Answer» SNAD fly Contaminated food Mosquito bite Stangnat water Answer :A::C::D

Discussion

14610.	Question : Write a short - note on 'lac culture .
Answer» Solution :(1)Lac is the resin like substance secreted from the dermal glands of the female of tacchardia lacca or lac insect.(2)Lac insect feeds on succulent vegetation of trees such as ber,peepul gets harded upon EXPOSURE to air.(3)This is natural lac which is conataminated.It is washed and filtered to get shellac in pure form.(4)Practising lac culture is of economical benefit for the FARMER.(5)For the purpose of getting regular supply of good quality and quantity of lac,artificial inoculation of plants is DONE.(6)Since lac insect is a native of iindia,about85% of the total lac is produced in INDIA.

Discussion

14611.	Question : Label the correct part of myosin monomer
Answer» a-heat, b-cross ARM, c-actin BINDING SITE a-ATP binding site, b-actin binding site, c-heat, d-cross arm a-cross arm, b-actin binding site, c-head, d-ATP binding site a-actin binding site, b-head, c-ATP binding site, d-cross arm. ANSWER :A

Discussion

14612.	Question : Tobacco plants are damaged severely when infested with Meloidogyne incognita. Name and explain the strategy that is adopted to stop this infestation?
Answer» SOLUTION :RNA I (RNA INTERFERENCE)

Discussion

14613.	Question : Label the aquatic zones in the given picture
Answer» SOLUTION :A-Littoral ZONE, B - LIMNETIC zone, C-Profundal zone, D- BENTHIC zone

Discussion

14614.	Question : Infant mortality in India is:14/100029/100062/100072/1000
Answer» `14//1000` `45//1000` `62//1000` `72//1000` ANSWER :D

Discussion

14615.	Question : Label a, b, c, d and e are given below in the diagram of synaptic transmission :-
Answer» ANSWER :D

Discussion

14616.	Question : Infactive protein of a vrisus is nucleic acid'. It was discovered by
Answer» FLEX d' Herelle Hershey and Chase Stanley lvanowsky Answer :B

Discussion

14617.	Question :LAB protect us from the adverse effect of harmful bacteria which are present in.....
Answer» mouth STOMACH OESOPHAGUS INTESTINE SOLUTION :stomach

Discussion

14618.	Question : Industrial melansim inan exampleof :
Answer» NEO LAMARCKISM Neo Darwinism Naturalselection MUTATION ANSWER :C

Discussion

14619.	Question :LAB is used in preparation of ......
Answer» curd dosa Idli all the above Solution :all the above

Discussion

14620.	Question : l- shaped chromosomes are termed :
Answer» endosme puff RING NUCLEOTIDE NUCLEOSOME ANSWER :D

Discussion

14621.	Question : L shape chromosomes are described as _______
Answer» acrocentric metacentric submetacentricq telocentric Answer :A::B::C

Discussion

14622.	Question : Industrial melanism was highlighted by
Answer» MIMOSA pudica Triticum aestivum Biston betularia Rock python Answer :C

Discussion

14623.	Question : Kyoto Protocol was endorsed at(A) COP-3(B) COP-5(C) COP-6(D) COP-4
Answer» COP-3 COP-5 COP-6 COP-4 Answer :A

Discussion

14624.	Question : Industrial melanism as observed in peppered moth proves that the
Answer» True black melanic FORMS arise by a reccuring RANDOM mutation Melanic form of the moth has no SELECTIVE advantage either in polluted industrial area or non-polluted area Melanism is a pollution generated feature Answer :A

Discussion

14625.	Question : Kyoto protocol (1997) was endorsed for :-
Answer» CLIMATE change Sewage treatment Euro-norms Forest conservation Answer :A

Discussion

14626.	Question :Industrial melanism is an example of
Answer» NEO Darwinism NATURAL SELECTION Mutation Neo Lamarckism Solution :Natural selection

Discussion

14627.	Question : Kyoto Protocal was endorsed at :
Answer» COP - 5 CoP - 6 CoP - 4 CoP - 3 Answer :D

Discussion

14628.	Question : Kreb's has been awarded Nobel Prize in 1953 for explaining
Answer» ENERGY FORMING PROCESS in the cell ATP metabolism Respiration chain Oxidation of cytoplasm Answer :A

Discussion

14629.	Question : Industrial melanism is an example of
Answer» DARKENING of skin DUE to smoke from industries protective resemblance with the SURROUNDINGS defensive adaptation of skin against ultraviolet radiations drug resistance Answer :B

Discussion

14630.	Question : KVIC is related with :(A) Dairy industry(B) Biogas production(C) Sewage treatment(D) Both (A) & (B)
Answer» Dairy industry BIOGAS PRODUCTION Sewage treatment Both (A) & (B) Solution :Biogas production

Discussion

14631.	Question : Krebs cycle produces
Answer» ATP UTP CTP TTP ANSWER :A

Discussion

14632.	Question : Industrial melanism as observed in peppered moth proves that
Answer» the DARK melanic form of the moth has no selective advantage over lighter form in industrial area. the lighter form moth has no selective advantageeither in polluted industrial area or non-pulluted area MELANISM is a pollution-generated feature the true black melanic forms escaped unnoticed so they managed to survive resulting in more POPULATION of black moths. Solution :Industrial melanism SUPPORTS evolution by natural selection. The BALCK moths managed to survive as they escaped against the dark back of trees, resulting in their increased number.

Discussion

14633.	Question : Krebs cycle is involved during the oxidation of
Answer» PROTEINS and FATS only CARBOHYDRATES and fats only Carbohydrates only Carbohydrates, fats and proteins ANSWER :D

Discussion

14634.	Question : Industrialeffluentsand domesticsewageserouslyaffectfreshwater bodies for protectingaquaticlifeGovt .of indiarecentlydeclaredan animalas nationalaquaticanimal a) Identify the animal b) Distinguishbiomagnificationfromeutrophication .
Answer» SOLUTION :a) DOLPHIN

Discussion

14635.	Question : Krebs' cycle is also called metabolic sink as it is a common pathway for
Answer» CARBOHYDRATES, fats and proteins (AMINO ACIDS) Carbohydrates and fats only Carbohydrates and organic acids only Proteins and fats only ANSWER :A

Discussion

14636.	Question : Industrial effluents and domestic sewage seriously affect fresh water bodies. For protecting aquatic life, Govt of India recently declared an animal a national aquatic animal. Distinguish Biomagnification from Eutrophication.
Answer» Solution :Biomagnificaion is the increase in CONCENTRATION of the toxicant at SUCCESSIVE trophic LEVELS. Eutrophication is the PROCESS of nutrient ENRICHMENT of water and consequent loss of species diversity.

Discussion

14637.	Question : Kreb's cycle
Answer» LIBERATES a MINOR part of energy during respiration Is operative in photorespiration Reactions are independent of oxygen supply Is a link between CARBOHYDRATE and nitrogen metabolism Answer :D

Discussion

14638.	Question : Kranz anatomy is typical of.
Answer» `C_4` - PLANTS `C_3` - plants `C_2` - plants PHOTORESPIRATION ANSWER :A

Discussion

14639.	Question : Industrial effluents and domestic sewageseriously affect fresh water bodies. Forprotectingaquatic life Govt. of India recentlydeclared an animals as National aquatic animal. a. Identifythe animals. ii. Distinguish biomagificationfrom eutrophication.
Answer» SOLUTION :a.Fresh water DOLPHIN. b.Biomagnifiations refers to theincrease in CONCENTRATIONOF the toxicantat successivetrophic levels. Eutrophication is the naturalageing of alakeby nutrientenrichmentof its water .

Discussion

14640.	Question :Kranz anatomy is one of the characteristics of the leaves of:
Answer» Potato wheat Sugarcane Mustard Answer :C

Discussion

14641.	Question : Industrial melanism as observed in pepperedmoth proves that
Answer» Melanism is a POLLUTION - generated FEATURE The true black melanic forms arise by a recurring random mutation The melanicform of themoth has no selectiveadvantageoverlightform in indusrtal AREA Thelighter form of the moth has noselective advantageeitherinindustrialarea Answer :B

Discussion

14642.	Question : Repressible operon system is usually found in (i)____ pathways. The pathway's end product serves as a (ii) ______ to activate the repressor, turn off enzyme synthesis and prevent overproduction of the end product of the pathway. Genes for this operon are usually switched (iii)_____ and the repressor is synthesised in an (iV)_____ .
Answer» `{:("(i)","(ii)","(III)","(iv)"),("anabolic","corepressor","on","INACTIVE"):}` `{:("(i)","(ii)","(iii)","(iv)"),("anabolic","INDUCER","off","active"):}` `{:("(i)","(ii)","(iii)","(iv)"),("CATABOLIC","inducer","off","active"):}` `{:("(i)","(ii)","(iii)","(iv)"),("catabolic","corepressor","on","inactive"):}` ANSWER :c

Discussion

14643.	Question : Kranz' anatomy is found in
Answer» SUGAR CANE MAIZE SORGHUM All the above ANSWER :D

Discussion

14644.	Question : Kornberg enzyme is called as …………………
Answer» SOLUTION :DNA POLYMERASE I

Discussion

14645.	Question : Inducible enzymes are
Answer» USUALLY involved in anabolic pathways produced when a SMALL molecule (inducer) INACTIVATES the repressor protein Produced when an activator molecule enhances the ATTACHMENT of RNA polymerase with the operator regulated by inherently inactive repressor molecules Answer :B

Discussion

14646.	Question : Konbergenzyme adds _____ nucleoides per minute during polymerase activity
Answer» 50 2000 1000 500 Answer :C

Discussion

14647.	Question : Induced breeding is carried out in case of
Answer» PISICULTURE APICULTURE sericuture LAC CULTURE ANSWER :A

Discussion

14648.	Question : Koala and Bandicoot show
Answer» ADAPTIVE radiation Convergent evolution Parallel evolution Both (2)and(3) ANSWER :A

Discussion

14649.	Question : Known sequence of DNA that is used to find complementary DNA strand is:
Answer» vector plasmid DNA probe recombinant DNA Answer :C

Discussion

14650.	Question : Individuals homozygous for ed genes were crosserd with wild type++. The F1 dihybrid, thus produced was test crossed. It produced progeny in the following ratio+ 900,+d115, cd 880, + 105. What is the distance between c and d genes?
Answer» 47 UNITS 88 units 11 units 5.75 units Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : Lac operon is repressible system.

Question : Infection of Ascaris usually occurs by

Question : lac is the secretion of

Question : Infection of Ascaris usually occurs by:

Question : Lac from Lac insects (Laccifer) is :-

Question : Infectionin whichcapulespassoutof thebodythroughfaeces andurineis

Question : Labia - Clitoris

Question : Infection of Ascariasis occur due to ……..

Question : Write a short - note on 'lac culture .

Question : Label the correct part of myosin monomer

Question : Tobacco plants are damaged severely when infested with Meloidogyne incognita. Name and explain the strategy that is adopted to stop this infestation?

Question : Label the aquatic zones in the given picture

Question : Infant mortality in India is:14/100029/100062/100072/1000

Question : Label a, b, c, d and e are given below in the diagram of synaptic transmission :-

Question : Infactive protein of a vrisus is nucleic acid'. It was discovered by

Question :LAB protect us from the adverse effect of harmful bacteria which are present in.....

Question : Industrial melansim inan exampleof :

Question :LAB is used in preparation of ......

Question : l- shaped chromosomes are termed :

Question : L shape chromosomes are described as _______

Question : Industrial melanism was highlighted by

Question : Kyoto Protocol was endorsed at(A) COP-3(B) COP-5(C) COP-6(D) COP-4

Question : Industrial melanism as observed in peppered moth proves that the

Question : Kyoto protocol (1997) was endorsed for :-

Question :Industrial melanism is an example of

Question : Kyoto Protocal was endorsed at :

Question : Kreb's has been awarded Nobel Prize in 1953 for explaining

Question : Industrial melanism is an example of

Question : KVIC is related with :(A) Dairy industry(B) Biogas production(C) Sewage treatment(D) Both (A) & (B)

Question : Krebs cycle produces

Question : Industrial melanism as observed in peppered moth proves that

Question : Krebs cycle is involved during the oxidation of

Question : Industrialeffluentsand domesticsewageserouslyaffectfreshwater bodies for protectingaquaticlifeGovt .of indiarecentlydeclaredan animalas nationalaquaticanimal a) Identify the animal b) Distinguishbiomagnificationfromeutrophication .

Question : Krebs' cycle is also called metabolic sink as it is a common pathway for

Question : Industrial effluents and domestic sewage seriously affect fresh water bodies. For protecting aquatic life, Govt of India recently declared an animal a national aquatic animal. Distinguish Biomagnification from Eutrophication.

Question : Kreb's cycle

Question : Kranz anatomy is typical of.

Question : Industrial effluents and domestic sewageseriously affect fresh water bodies. Forprotectingaquatic life Govt. of India recentlydeclared an animals as National aquatic animal. a. Identifythe animals. ii. Distinguish biomagificationfrom eutrophication.

Question :Kranz anatomy is one of the characteristics of the leaves of:

Question : Industrial melanism as observed in pepperedmoth proves that

Question : Kranz' anatomy is found in

Question : Kornberg enzyme is called as …………………

Question : Inducible enzymes are

Question : Konbergenzyme adds _____ nucleoides per minute during polymerase activity

Question : Induced breeding is carried out in case of

Question : Koala and Bandicoot show

Question : Known sequence of DNA that is used to find complementary DNA strand is:

Question : Individuals homozygous for ed genes were crosserd with wild type++. The F1 dihybrid, thus produced was test crossed. It produced progeny in the following ratio+ 900,+d115, cd 880, + 105. What is the distance between c and d genes?