24277 + Interview Questions in Biology in Class 12 Page 441 InterviewSolution

22001.	Question : An inverted pyramid biomass and an inverted pyramid of biomass are respectively seen in
Answer» GRASSLAND and TREE ECOSYSTEM SEA and tree ecosystem Tree and sea ecosystem Sea and grassland ecosystem Solution :Tree and sea ecosystem

Discussion

22002.	Question : An intersting property of restriction enzymes is molecular cutting and past-ing. Restriction enzymes typically recognize a symmetrical sequenceof DNA . Notice that the top strand is the same as the bottom strand, but reads backward . When the enzyme cuts the strand between G and A, it leaves over-hanging chains a. What is this symmetrical sequence of DNA known as ?b. What is the significance of these overhanging chains ?c. Name the restriction enzyme that cuts the strand between G and A.
Answer» Solution :a. This symmetrical sequence of DNA is KNOWN as .palindromic se-quence . B. These overhanging chains have sticky ends and they can be easily joined by DNAligase. c. RESTRICTION ENDONUCLEASE from E.coli strain (Eco RI)

Discussion

22003.	Question : An International treaty on ozone depletion known as Montreal Protocol was signed at Montreal in the year
Answer» 1981 1983 1985 1987 ANSWER :D

Discussion

22004.	Question : An international treaty known as Montreal Protocol was signed to control emission of:
Answer» UV rays ozone CFC oxygen Answer :C

Discussion

22005.	Question : An interesting property of restriction enzymes is molecular cutting. Restriction enzymes typically recognise a symmetrical sequence of DNA. Notice that the top strand is the same as the bottom strand, but reads backward. When the enzyme cuts the strand between G and A, it leaves overhanging chains : (a) What is this symmetrical sequence of DNA known as? (b) What is the significance of these overhanging chains? (c) Name the restriction enzyme that cuts the strand between G and A.
Answer» Solution :(a) Palindromic nucleotide sequence/ Recognition sequence. (b) DNA FRAGMENTS from two different molecules which have the same kind of sticky ENDS or OVERHANGING chains can be joined TOGETHER (end to end) by DNA ligases. (c) FEAR!.

Discussion

22006.	Question : An interesting property of restriction enzymes is molecular cutting and pasting. Restriction enzymes typically recognize a symmetrical sequence of DNA. Notice that the top strand is the same as the bottom strand, but reads backward. When the enzyme cuts the strand between G and A, it leaves overhanging chains: A. What is this symmetrical sequence of DNA known as? B. What is the significance of these overhanging chains? C. Name the restriction enzyme that cuts the strand between G and A.
Answer» Solution :A. Palindromic sequence B. Sticky ENDS C. ECORI

Discussion

22007.	Question : Aninteractior betweentwo individualswhereone is benefitted whilethe otherisneither benefitte nor harmedis calledas
Answer» PREDATION SYMBIOSIS COMMENSALISM PARASITISM ANSWER :d

Discussion

22008.	Question : An interaction favourable to both the population , but not obligatory to either is :
Answer» Proto-cooperation Mutuaslim COMMENSALISM PARASITISM ANSWER :A

Discussion

22009.	Question : An inter-breeding population of finches became separated geographically, forming two isolated groups. Each group then became subect to different selective pressures. One group was then introduced into the habitat of the other. Which one of the following would determiner wheather they now formed two district species?
Answer» They had been separated for more than three milion years. They FAILED to produce fertile `F_(1)` HYBRIDS. They showed marked differences in the shape of their BEAKS. Their plumage had become markely different. Solution : Once inter-breeding POPULATION of finches, now have failed to produce fertile `F_(1)` hybrids, this means they have now formed TOW distinct species.

Discussion

22010.	Question : An instrument used for tubal ligation is _______.
Answer» ANSWER :Laperoscope

Discussion

22011.	Question : An integral system resulting from interaction of living organisms and non-living factors.
Answer» ANSWER :ECOSYSTEM

Discussion

22012.	Question :An institution, where valuable plant material-likely to become irretrievably lost in the wild or in cultivation is preserved in a viable condition is known as
Answer» genome gene library gene bank herbarium Answer :C

Discussion

22013.	Question : An institution where valuable plant material likely to become irretrievably lost in the wild or in cultivation is preserved a viable condition in known as
Answer» GENOME GENE LIBRARY Gene BANK Herbarium SOLUTION :Gene bank

Discussion

22014.	Question : An institution where valuable plant material is likely to become irretrievably lost in the wild or in cultivation is preserved viable condition is known as
Answer» Genome GENE library Gene bank HERBARIUM ANSWER :C

Discussion

22015.	Question : An institution where valuable plant material likely to become irretrievably lost in the wild or in cultivation is preserved in a viable condition is known as:
Answer» Genome Gene library Gene bank Herbarium Answer :C

Discussion

22016.	Question : An insecticide is sprayed on the vegetation in an area. In which organisms will be highest level of insecticide accumulate after a period of time:- (A) Foxes (B) Hawks (C) Mouse (D) Small bird
Answer» A only A and D both B only A and B both Answer :C

Discussion

22017.	Question : an infloresence appearing like a flower which is not recemose is
Answer» umbel corymb cyathium capitulum Answer :C

Discussion

22018.	Question : An innovative professor who wants to give a live demonstration of a physiological process, filled a glass bottle with previously moistened mustard seeds, screw-capped the bottle and kept it away in corner and resumed his lecture. Towards the end of his lecture, there was a sudden explosion with glass pieces of the bottle thrown around. Which of the followingphenomenon did the professor wanted to demonstrate?
Answer» Diffusion Anaerobic respiration Osmosis imbibition Answer :D

Discussion

22019.	Question : An industrial melanism supports :
Answer» NATURAL SELECTION Migration Geneflow GENETIC drift Answer :A

Discussion

22020.	Question : An individual heterozygous for two alleles (Aa Bb) produces one million sperms. How many of the sperms will have both recessive parental type (aabb). What would be the ratio of offspring in the next generation?
Answer» 0.25 million 1 million 2 million 0.5 million Answer :A

Discussion

22021.	Question : An individual with cd genes is crossed with wild type ++. On test crossing F_(1) hybrid, the progeny was +c 105, +d 115, cd 880 and ++ 900. Distance between cd genes is
Answer» 44 MAP units 55 map units 11 map units 88 map units Answer :C

Discussion

22022.	Question : An individual homozgous for genes cd is crossed with wild type and F_(1) is crossed back with the double recessive. The appearance of the offspring is a follows: {:(++""-""903),(cd""-""897),(+d""-""98),(c+""-""102):} The distance between genes c and d is
Answer» 20 MAP units 9.8 map units 10.2 map units 10 map units Answer :D

Discussion

22023.	Question : An individual, which always perform true breeding is
Answer» DOMINANT Recessive Hybrid None of these Answer :B

Discussion

22024.	Question : An individualmayhavebirthsand deathsbut a population has (a )and (b )Anindividual is eithera male ora femalebut apopulationhas a (c ) .
Answer» SOLUTION :a. BIRTH are DEATHRATE C SEXRATIO.

Discussion

22025.	Question : An individual bathing in an infected pool or coming in cotact with contaminated water is liable to be infected with____. The ____larva stick to the surface of the skin of swimmer or bather, and penetrate the skin.
Answer» ANCYLOSTOMA, `II^(ND)` juvenile Bilharzia, CERCARIA Schistosoma, metacercariae Bilharzia, redia Solution :Bilharzia, Cercaria

Discussion

22026.	Question : An individual and a population has certain characteristics. Name these attributes with definitions.
Answer» SOLUTION :• A POPULATION has certain attributes that an individual organism does not. • An individual may have births and deaths, but a population has BIRTH rates and death rates. In a population these rates refer to per CAPITA births and deaths, respectively. • The rates, hence, expressed as change in numbers (increase or decrease) with respect to members of the population . •Another attribute characteristic of a population is sex ratio. • An individual is either a male or a female but a population has a sex ratio (e.g., 60 per cent of the population are females and 40 per cent males). • A population at any given time is composed of individuals of different ages. • If the age distribution (per cent individuals of a given age or age group is plotted for the population, the RESULTING structure is called an age pyramid. • For human population, the age pyramids generally show age distribution of males and females in a combined diagram. • The shape of the pyramids reflects the growth status of the population. • (a) whether it is growing, (b) stable or (c) declining.

Discussion

22027.	Question : An individual has a number of different types of cells was first stated by
Answer» Dujardin Robert Brown Dutrochet SCHLEIDEN and Sohwann Answer :C

Discussion

22028.	Question : An incorrect statement regarding respiratory substrates is :-
Answer» When proteins are used as respiratory SUBSTRATE, the VOLUME of `CO_(2)` evolved is less than the volume of `O_(2)` consumed Only FRESHLY formed BIOMOLECULES are used as respiratory substrate Pure proteins and fats are never used as respiratory substrates Sucrose directly does not ENTER into glycolysis Answer :B

Discussion

22029.	Question : An improved variety of transgenic basmati rice
Answer» Does not require chemical fertilisers and GROWTH hormones GIVES high yield and is RICH in vitamin A Is completely resistant to all INSECT PESTS and diseases of paddy Gives high yield but has no characteristic aroma Answer :B

Discussion

22030.	Question : An improved variety of transgenic basmati rice(A) does not require chemical fertilizers and growth hormones(B) gives high yield and is rich in vitamin A(C) is completely resistant to all insect pests and diseases of paddy(D) gives high yield but has no characteristic aroma.
Answer» does not require chemical fertilizers and growth HORMONES GIVES high yield and is rich in vitamin A is completly RESISTANT to all insect PESTS and diseases of paddy gives high yield but has no CHARACTERISTIC aroma. Solution :gives high yield and is rich in vitamin A

Discussion

22031.	Question : An important germplasm storing centre in India is
Answer» CDRI FRI ICRISAT NEERI SOLUTION :ICRISAT

Discussion

22032.	Question : An important evidence in favour of organic evolution is the occurrence of
Answer» ANALOGOUS and VESTIGIAL ORGANS HOMOLOGOUS organs only homologous and analogous organs homologous and vestigial organs Solution :homologous and vestigial organs

Discussion

22033.	Question : An important food crop developed by genetic engineering technique solve the problem of vit. A deficiency. Name it.
Answer» ANSWER :C::D

Discussion

22034.	Question : An improved variety of transgenic basmati rice :
Answer» gives high yield and is rich in VITAMIN A is completely resistant to all INSECT PESTS and diseases of paddy gives high yield but has no characteristic aroma does not require chemical FERTILIZERS and growth horma Answer :A

Discussion

22035.	Question : An important feature of the early atmosphere was the virtual absence of
Answer» `N_(2)` `CO_(2)` `HCN` `O_(2)` ANSWER :D

Discussion

22036.	Question : An immune disease in which body destroys the thyroid gland is
Answer» HASHIMOTO disease Simmond's disease Cretinism Myxoedema Answer :A

Discussion

22037.	Question : An ideal contraceptive should be :-
Answer» User-friendly Easily available Effective and REVERSIBLE with no or LEAST SIDE effects All of the above Answer :D

Discussion

22038.	Question : An ezyme that uses viral RNA as template for the synthesis of DNA is
Answer» RNA polymerase reverse transcriptase viral nuclease RNA replicase Answer :B

Discussion

22039.	Question : An extra chormosomal segment of circular DNA is used to carry gene of interest into the host cell.What is the name giben to it ?
Answer» SOLUTION :PLASMID.

Discussion

22040.	Question : An extrachromosomal DNA which can be used as vector in gene cloning is called :
Answer» TRANSPOSON INTRON EXON Plasmid Answer :D

Discussion

22041.	Question : An extinct reptile with huge fearsome dagger like teeth and grown to enormous height
Answer» Ichthyosaur Tyrannosaurus Dryopithecus Triceratops Answer :B

Discussion

22042.	Question : An experimental setup to show that CO_(2) is essential for photosynthesis is
Answer» ANSWER :MOLL's HALF LEAF EXPERIMENT

Discussion

22043.	Question : An explant is -
Answer» Dead plant Part of the plant Part of the plant used in TISSUE CULTURE Part of the plant that EXPRESSES a specific gene. Solution :An explant is a part of the plant used in tissue culture. From this SEVERAL plants of the same TYPE can be generated.

Discussion

22044.	Question : An example of symbiotic nitrogen fixing bacterium is________.
Answer» Azotobacter Rhizobium Methanobacterium Clostridium Answer :B

Discussion

22045.	Question : An excellent layer among the poultry birds is
Answer» BV - 300 White LEGHORN MINORCA Aseel Answer :B

Discussion

22046.	Question : An exception to cell theory is:
Answer» Virus Bacteria Mycoplasma All of these Answer :A

Discussion

22047.	Question : An example of sex influenced inheritance is
Answer» HAEMOPHILIA BALDNESS COLOURBLINDNESS Down 's sysnderome. Answer :B

Discussion

22048.	Question : An example of protandary is ………….. .
Answer» HELIANTHUS and salvia Helianthus and Clerodendron Scrophularia and Aristolochia Scrophularia and Aristolochia Answer :A

Discussion

22049.	Question : An example of half inferior ovary is :-
Answer» Cucumber Mustard Peach Chinarose Answer :C

Discussion

22050.	Question : An example of gene therapy is :
Answer» production of injectable Hepatitis B vacine production of vaccines in food crops like potatoes which can be eaten production of TESTTUBE babies by artificial insemination and implantion of fertilized eggs introduction of gene for ADENOSINE deaminase in persons suffering from SEVERE Combined Immuno Deficiency (SCID). ANSWER :D

Discussion

Explore topic-wise InterviewSolutions in .

Question : An inverted pyramid biomass and an inverted pyramid of biomass are respectively seen in

Question : An International treaty on ozone depletion known as Montreal Protocol was signed at Montreal in the year

Question : An international treaty known as Montreal Protocol was signed to control emission of:

Question : Aninteractior betweentwo individualswhereone is benefitted whilethe otherisneither benefitte nor harmedis calledas

Question : An interaction favourable to both the population , but not obligatory to either is :

Question : An instrument used for tubal ligation is _______.

Question : An integral system resulting from interaction of living organisms and non-living factors.

Question :An institution, where valuable plant material-likely to become irretrievably lost in the wild or in cultivation is preserved in a viable condition is known as

Question : An institution where valuable plant material likely to become irretrievably lost in the wild or in cultivation is preserved a viable condition in known as

Question : An institution where valuable plant material is likely to become irretrievably lost in the wild or in cultivation is preserved viable condition is known as

Question : An institution where valuable plant material likely to become irretrievably lost in the wild or in cultivation is preserved in a viable condition is known as:

Question : An insecticide is sprayed on the vegetation in an area. In which organisms will be highest level of insecticide accumulate after a period of time:- (A) Foxes (B) Hawks (C) Mouse (D) Small bird

Question : an infloresence appearing like a flower which is not recemose is

Question : An industrial melanism supports :

Question : An individual heterozygous for two alleles (Aa Bb) produces one million sperms. How many of the sperms will have both recessive parental type (aabb). What would be the ratio of offspring in the next generation?

Question : An individual with cd genes is crossed with wild type ++. On test crossing F_(1) hybrid, the progeny was +c 105, +d 115, cd 880 and ++ 900. Distance between cd genes is

Question : An individual homozgous for genes cd is crossed with wild type and F_(1) is crossed back with the double recessive. The appearance of the offspring is a follows: {:(++""-""903),(cd""-""897),(+d""-""98),(c+""-""102):} The distance between genes c and d is

Question : An individual, which always perform true breeding is

Question : An individualmayhavebirthsand deathsbut a population has (a )and (b )Anindividual is eithera male ora femalebut apopulationhas a (c ) .

Question : An individual bathing in an infected pool or coming in cotact with contaminated water is liable to be infected with____. The ____larva stick to the surface of the skin of swimmer or bather, and penetrate the skin.

Question : An individual and a population has certain characteristics. Name these attributes with definitions.

Question : An individual has a number of different types of cells was first stated by

Question : An incorrect statement regarding respiratory substrates is :-

Question : An improved variety of transgenic basmati rice

Question : An improved variety of transgenic basmati rice(A) does not require chemical fertilizers and growth hormones(B) gives high yield and is rich in vitamin A(C) is completely resistant to all insect pests and diseases of paddy(D) gives high yield but has no characteristic aroma.

Question : An important germplasm storing centre in India is

Question : An important evidence in favour of organic evolution is the occurrence of

Question : An important food crop developed by genetic engineering technique solve the problem of vit. A deficiency. Name it.

Question : An improved variety of transgenic basmati rice :

Question : An important feature of the early atmosphere was the virtual absence of

Question : An immune disease in which body destroys the thyroid gland is

Question : An ideal contraceptive should be :-

Question : An ezyme that uses viral RNA as template for the synthesis of DNA is

Question : An extra chormosomal segment of circular DNA is used to carry gene of interest into the host cell.What is the name giben to it ?

Question : An extrachromosomal DNA which can be used as vector in gene cloning is called :

Question : An extinct reptile with huge fearsome dagger like teeth and grown to enormous height

Question : An experimental setup to show that CO_(2) is essential for photosynthesis is

Question : An explant is -

Question : An example of symbiotic nitrogen fixing bacterium is________.

Question : An excellent layer among the poultry birds is

Question : An exception to cell theory is:

Question : An example of sex influenced inheritance is

Question : An example of protandary is ………….. .

Question : An example of half inferior ovary is :-

Question : An example of gene therapy is :

Question : An individual bathing in an infected pool or coming in cotact with contaminated water is liable to be infected with. The larva stick to the surface of the skin of swimmer or bather, and penetrate the skin.