24277 + Interview Questions in Biology in Class 12

1.	Question : The organisms which are restricted to a narrow range of salinity are known as
Answer» Salinitroph Euryhaline Salinohaline STENOHALINE ANSWER :D

Discussion

2.	Question : The organisms participating most actively in nitrogen cycle in nature are :-
Answer» BACTERIA Legumes PARASITIC ALGAE FUNGI ANSWER :A

Discussion

3.	Question : The organisms that exhibit the characters of two different groups are
Answer» The FOSSILS The LIVING fossils The CONNECTING links The extinct organisms Answer :C

Discussion

4.	Question : The organisms deriving their energy from the same energy source are grouped in same trophic level, while a series of trophic levels showing repeating eating and eaten by is called a food chain. These food chains may be predatory or parasitic or saprophytic chains. In an ecosystem , no food chain is independent . Different food chains are interlinked to form a network called food web. The food webs operate in both aquatic as well as terrestrial ecosystems . Answer the following equations on food chains and food webs : Why do the organisms of a higher torphic level have less energy available than those of a lower trophic level ?
Answer» Solution :Because during energy transfer from LOWER to HIGHER TROPHIC LEVEL, about 90% of energy is lost at each transfer.

Discussion

5.	Question : The organism which obtained energy by the process of fermentation are
Answer» CHEMOAUTOTROPHS Photoautotrophs Aerobic photoautotrophs Parasites Answer :A

Discussion

6.	Question : The organism which carries a disease from one organism to another is called :
Answer» Host Parasite Vector None of these Answer :C

Discussion

7.	Question :The organism responsible for the disease pneumonia in humans which infects the alveoli of the lungs is
Answer» Streptococcus Haemophilus bacillus both a and b Answer :D

Discussion

8.	Question : The organism that causes elephantiasis belongs to …………………..
Answer» insecta protozoa NEMATODA coelenterata SOLUTION :nematoda

Discussion

9.	Question : The organism used for alcoholic fermentation is:
Answer» Saccharomyces Aspergillus Pseudomonas Pencillium Answer :A

Discussion

10.	Question : The organisation which makes decision regarding the validity of GM research and the safety of introducing GM-organisms for public services is
Answer» Genetic Engineering APPROVAL Committee Genome Environment Action Committee Genetic Environment Approval Committee Genetics and Ethical ISSUE Action Committee Solution :Genetic MODIFICATION of organisms can have unpredictable results when such organisms are introduced into the ECOSYSTEM. Therefore, the Indian Government gas set up organisations such as GEAC (Genetic Engineering Approval Committee), Which will make decisions regarding the validity of GM research ADN the safety of introducing GM-organisms for public services

Discussion

11.	Question : The organisation which has published "Red Data Book" is
Answer» International Union For Conservation Of Nature and NATURAL Resource National ENVIRONMENTAL ENGINEERING Research Institute National Wildlife ACTION Plan Convention on International Trade in Endangered species of Wild FAUNA and Flora Answer :A

Discussion

12.	Question : The organisation of nervous system generally correlates with in animal group
Answer» LIFE style behaviour BODY FORM FOOD habits Answer :A

Discussion

13.	Question : The organic horizon is generally absent from agricultural soils because tilling, e.g., plowing, buries organic matter. Why is an organic horizon generally absent in desert soils?
Answer» Solution :(i) O-Horizon (Organic horizon) Consists of fresh or partially decomposed organic matter. (ii) `O_(1)` - Freshly fallen leaves, TWIGS, FLOWERS and fruits `O_(2)` - Dead PLANTS, animals and their excreta decomposed by micro-organisms. (iii) Desert SOIL has very little water to support a large community of plants and animals. (iv) Therefore the formation of O-Horizon is very negligible or absent in dessert soil.

Discussion

14.	Question : The organic acid concentration in CAM plants
Answer» DECREASES during day Increases at NIGHT Both (1) and (2) REMAINS same always Answer :C

Discussion

15.	Question : The organelle where cellular respiration takes place is the
Answer» nucleus endoplasmic reticulum ribosome mitochondria Answer :D

Discussion

16.	Question : The organ related with immunity is
Answer» LIVER PARATHYROID Thymus Pineal SOLUTION :Parathyroid

Discussion

17.	Question : The order in which horse evolution has occurred
Answer» EOHIPPUS, Mesohippus, Merychippus and EQUUS Merychippus, Eohippus, Equus and Mesohippus Merychippus, Eohippus, Equus, and Mesohippus Equus, Mesohippus, Merychippus and Eohippus Answer :B

Discussion

18.	Question : The orchid plant that grows on other plant are
Answer» Parasites Epiphytes SAPROPHYTES HALOPHYTES ANSWER :B

Discussion

19.	Question : The optimum pH of culture medium used In issue culture should be
Answer» 5.2 5.7 7.5 7 Answer :B

Discussion

20.	Question : The optimal capacity of the organism to produce offspring is called __________.
Answer» SOLUTION :BIOTIC POTENTIAL

Discussion

21.	Question : The optimal pH of culture medium is generally………………..
Answer» a) Acidic b) BASIC c) Neutral d) Slightly basic ANSWER :A

Discussion

22.	Question : The opening of the Post Caval Vein is guarded by -
Answer» MITRAL VALVE Eustachius Valve Thebesius valve Bicuspid Valve Answer :Eustachin Valve

Discussion

23.	Question : The opening of pulmonary arch into right ventricle of rabbit is guarded by _________ semilunar valves.
Answer» 2 4 3 1 Answer :C

Discussion

24.	Question : The oospore derived from double fertilization in angiosperms is(A) haploid(B) Diploid(C) Triploid(D) polypoid
Answer» haploid Diploid Triploid polypoid Solution :OOSPORE is ALSO CALLED as ZYGOTE

Discussion

25.	Question : The OP and TP of two pairs of cells A-B and X-Y are as under Cell A "" Cell B OP= -10 atm ""OP=10 atm TP=4 atm "" TP=6 atm Cell X "" Cell Y OP = -10 atm ""OP=-8 atm TP=4 atm "" TP=4 atm The net movement of water shall be from
Answer» A to B and X to Y A to B and Y to X B to A and X to Y B to A and Y to X Answer :D

Discussion

26.	Question : The only way for water and solute molecules to enter the vascular cylinder is
Answer» APOPLASTIC pathway Symplastic pathway OSMOSIS Facilitated diffusion ANSWER :B

Discussion

27.	Question : The only living element of xylem tissue
Answer» Has lignified walls Is absent in monocots Is INVOLVED in RADIAL CONDUCTION of water Is MADE up of MANY cells,fused together Answer :B

Discussion

28.	Question : The only enzyme that catalyses the reduction of substrate in the biochemical reactions of Anaerobic respiration is
Answer» PYRUVIC DECARBOXYLASE GLYCERALDEHYDE PHOSPHATE dehydrogense ALCOHOL dehydrogenase Enolase Answer :C

Discussion

29.	Question : The only cereal that has oroginatedand domestical from the New world.
Answer» Oryza sativa Triticum aestivum Triticum duram Zea mays Answer :C

Discussion

30.	Question : The only bone of the skull that does not articulate with any other bone is
Answer» Mandible Malleus Hyoid Zygomatic ANSWER :C

Discussion

31.	Question : The oldet fossil record from India is of a blue-green alga whixh is 3.2 billion years old. It is :
Answer» Stromatolites Archaeopteryx Chamydomonas Archaeospheroides Solution :N//A

Discussion

32.	Question : The only bloodvesselin earthwormin whichbloodflowsfrom thelastsegment to thefirstsegment is
Answer» subneural DORSAL VENTRAL supraoesophageal ANSWER :B

Discussion

33.	Question : The one-horned rhinoceros is specific to which of the following sanctuary ?
Answer» BHITAR Kanika Bandipur KAZIRANGA CORBETT PARK Solution :Kaziranga Kaziranga in Assam. Some other related INFORMATION is provided in the table below

Discussion

34.	Question : The one - horned rhinoceros is specific to whichof the following sanctuary ?
Answer» Bhitar KANIKA Bandipur Kaziranga CORBETT park ANSWER :B

Discussion

35.	Question : The oldest seed of Lupinus arcticus excavated from arctic Tundra was germinated and flowered after an estimated record of ---------- of domancy.
Answer» 2,000 years 10,000 years 20,000 years 1,00,000 years Answer :B

Discussion

36.	Question : The old name of Jim Corbett National Park was :
Answer» Hailey National PARK Anshi National Park BANDIPUR National Park Blackbuck National Park Answer :A

Discussion

37.	Question : The Okazaki fragments in DNA chain growth
Answer» Polymerize in the 3. to 5. direction and forms replication fork Prove semiconservative NATURE of DNA replication Polymerize in the 5. to -3. direction nad explain 3. to -5. DNA replication RESULT ONE of transcription Answer :C

Discussion

38.	Question : The okazaki fragmentsin DNA chain growth :
Answer» Polymerize in the `3^'` to `5^'` direction and forms replication fork Prove semi-conservative NATURE of DNA replication Polymerize in the `5^'` to `3^'` direction and EXPLAIN `3^'` to `5^'` DNA replication result in transcription Answer :C

Discussion

39.	Question : The offsprings of mating between two pure strains are called as:
Answer» heterosis hybrid progeny cybird Answer :B

Discussion

40.	Question : The __________ ofleech produces a cocoon.
Answer» SOLUTION :CLITELLUM

Discussion

41.	Question : The offspring that are exactly identical to one another as wel as identical to their parents are called as
Answer» Clone twins replicates drones Answer :A

Discussion

42.	Question : The offspring formed by asexual reproduction is refefrred to as clone.Justify this statement.
Answer» Solution :OFFSPRING fromed are morphologically and genetically similar among themselves and to their.so such INDIVIDUALS are called CLONE.

Discussion

43.	Question : The odd one is(A) micropyle(B) nucellus(C) embryo sac(D) Pollen grains
Answer» MICROPYLE nucellus embryosac Pollen grains Answer :D

Discussion

44.	Question : In an octamer of the nucleosome core DNA consists of ______ base pairs.
Answer» 46 146 246 346 Answer :B

Discussion

45.	Question : The nutritive cells found in seminiferous tubules are
Answer» LEYDIG cells Sertoli cells spermatogonial cells atretic FOLLICULAR cells Answer :B

Discussion

46.	Question : The numberof punctuation condons in a genetic code are
Answer» `2+3=5` `1+3=4` `1+1=2` `3` ANSWER :A

Discussion

47.	Question : The number of unpaired bones in the axial skeleton of an adult human is
Answer» 40 34 58 2 Answer :B

Discussion

48.	Question : The number of types of genotypes that can be produced by the multiple alleles A, B, O that determine human blood groups is
Answer» Three Four Five SIX ANSWER :D

Discussion

49.	Question : The number of types of blood group phenotypes that can be produced by the human blood groups alleles A,B, and O is
Answer» ONE Two Three Four Answer :D

Discussion

50.	Question : The number of trophic levels in an ecosystem is limited. Comment.
Answer» Solution :In a food chain, only 10% of the TOTAL amount of ENERGY is PASSED on to the next trophic LEVEL from the previous trophic level. So, there is a decrease in the amount of energy available at the successive trophic levels. As we move higher up in the food chain the amount of energy diminishes to a level at which it cannot sustain any trophic level, thereby limiting the NUMBER of trophic levels.

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question : The organisms which are restricted to a narrow range of salinity are known as

Question : The organisms participating most actively in nitrogen cycle in nature are :-

Question : The organisms that exhibit the characters of two different groups are

Question : The organism which obtained energy by the process of fermentation are

Question : The organism which carries a disease from one organism to another is called :

Question :The organism responsible for the disease pneumonia in humans which infects the alveoli of the lungs is

Question : The organism that causes elephantiasis belongs to …………………..

Question : The organism used for alcoholic fermentation is:

Question : The organisation which makes decision regarding the validity of GM research and the safety of introducing GM-organisms for public services is

Question : The organisation which has published "Red Data Book" is

Question : The organisation of nervous system generally correlates with in animal group

Question : The organic horizon is generally absent from agricultural soils because tilling, e.g., plowing, buries organic matter. Why is an organic horizon generally absent in desert soils?

Question : The organic acid concentration in CAM plants

Question : The organelle where cellular respiration takes place is the

Question : The organ related with immunity is

Question : The order in which horse evolution has occurred

Question : The orchid plant that grows on other plant are

Question : The optimum pH of culture medium used In issue culture should be

Question : The optimal capacity of the organism to produce offspring is called __________.

Question : The optimal pH of culture medium is generally………………..

Question : The opening of the Post Caval Vein is guarded by -

Question : The opening of pulmonary arch into right ventricle of rabbit is guarded by _________ semilunar valves.

Question : The oospore derived from double fertilization in angiosperms is(A) haploid(B) Diploid(C) Triploid(D) polypoid

Question : The OP and TP of two pairs of cells A-B and X-Y are as under Cell A "" Cell B OP= -10 atm ""OP=10 atm TP=4 atm "" TP=6 atm Cell X "" Cell Y OP = -10 atm ""OP=-8 atm TP=4 atm "" TP=4 atm The net movement of water shall be from

Question : The only way for water and solute molecules to enter the vascular cylinder is

Question : The only living element of xylem tissue

Question : The only enzyme that catalyses the reduction of substrate in the biochemical reactions of Anaerobic respiration is

Question : The only cereal that has oroginatedand domestical from the New world.

Question : The only bone of the skull that does not articulate with any other bone is

Question : The oldet fossil record from India is of a blue-green alga whixh is 3.2 billion years old. It is :

Question : The only bloodvesselin earthwormin whichbloodflowsfrom thelastsegment to thefirstsegment is

Question : The one-horned rhinoceros is specific to which of the following sanctuary ?

Question : The one - horned rhinoceros is specific to whichof the following sanctuary ?

Question : The oldest seed of Lupinus arcticus excavated from arctic Tundra was germinated and flowered after an estimated record of ---------- of domancy.

Question : The old name of Jim Corbett National Park was :

Question : The Okazaki fragments in DNA chain growth

Question : The okazaki fragmentsin DNA chain growth :

Question : The offsprings of mating between two pure strains are called as:

Question : The __________ ofleech produces a cocoon.

Question : The offspring that are exactly identical to one another as wel as identical to their parents are called as

Question : The offspring formed by asexual reproduction is refefrred to as clone.Justify this statement.

Question : The odd one is(A) micropyle(B) nucellus(C) embryo sac(D) Pollen grains

Question : In an octamer of the nucleosome core DNA consists of ______ base pairs.

Question : The nutritive cells found in seminiferous tubules are

Question : The numberof punctuation condons in a genetic code are

Question : The number of unpaired bones in the axial skeleton of an adult human is

Question : The number of types of genotypes that can be produced by the multiple alleles A, B, O that determine human blood groups is

Question : The number of types of blood group phenotypes that can be produced by the human blood groups alleles A,B, and O is

Question : The number of trophic levels in an ecosystem is limited. Comment.