24277 + Interview Questions in Biology in Class 12

1.	Question : The interferons are
Answer» Antibacterial DRUGS Antiviral drugs ANTIBIOTIC drugs Immunosuppressive drugs SOLUTION :Antiviral drugs

Discussion

2.	Question : The main function of mammalian corpus luteum is to produce :
Answer» ESTROGEN only Progesterone Human CHORIONIC gonadotropin Relaxin Answer :B

Discussion

3.	Question : The main function of intestinal villi is:
Answer» Secretion Absorption Ultrafiltration Digestion Answer :B

Discussion

4.	Question : The interaction where one species is benefitted and the other is neither benfitted nor harmed is called as :
Answer» AMENSALISM COMMENSALISM MUTUALISM Predation Answer :B

Discussion

5.	Question : The true embryo develops from the structure formed as a result of fusion of :
Answer» Two polar nuclei of embryo sac Egg CELL and female gamete Egg cell and MALE gamete Male gamete and antipodals Answer :C

Discussion

6.	Question : The interaction of species with the environment is called as
Answer» COMMUNITY ENVIRONMENT ECOSYSTEM AUTECOLOGY ANSWER :D

Discussion

7.	Question : The main difference between active and passive transport across cell membrane is :
Answer» Passive transport is non-SELECTIVE wherease active transport is selective Passive transport requires a concentration GRADIENT across a biological membrane whereas active transport requires energy to move solutes Passive transport is confined to anionic CARRIER proteins whereas active transport is confined to cationic CHANNEL proteins Active transport occurs more RAPIDLY than passive transport Answer :B

Discussion

8.	Question : The main difference between white and yellow fibre is of
Answer» Protein Colour of fibre Both 1 & 2 None of the above Answer :C

Discussion

9.	Question : The interaction in nature, where one gets benefit on the expense of other is…………. .
Answer» a) Predation b) MUTUALISM C) Amensalism d) COMMENSALISM Solution :Commensalism

Discussion

10.	Question : The main constituent of cell wall in chlorophycean algae is______.
Answer» ANSWER :CELLULOSE

Discussion

11.	Question : The interaction between ruminants and the bacteria in intestine is …….. .
Answer» predation parasitism commensalism mutualism Answer :D

Discussion

12.	Question : The main challenge for production of insulin using rDNA techniques was -
Answer» GETTING the insulin gene TRANSCRIBED correctly Getting the insulin gene TRANSLATED correctly To prevent the consumption of insulin by HOST cell Getting insulin assembled into a mature form Answer :A

Discussion

13.	Question : The main composition of fungal cell wall is___________.
Answer» ANSWER :CHITIN

Discussion

14.	Question : The intensity of whisper is around _________ decibels.
Answer» ANSWER :B

Discussion

15.	Question : The main constituent of biogas is _____.
Answer» Methane Carbon dioxide Carbon monoxide Hydrogen sulphide Answer :A

Discussion

16.	Question : The integumentsof theovule enclose a openingcalled________.
Answer» SOLUTION :MICROPYLE

Discussion

17.	Question : The main challenge for production of insulin peptide using rDNA technique was
Answer» Getting normal INSULIN gene Getting insulin ASSEMBLED into a mature form Getting insulin chains FORMED from bacteria Getting insulin assembled into proinsulin Answer :B

Discussion

18.	Question : The intensity of sound is measured in
Answer» Dobson Hertz DECIBEL Frequency SOLUTION :Decibel

Discussion

19.	Question : The magnitude of following quantities increases when water starts entering into the cell
Answer» WATER potential Turgor pressure Osmotic potential 1 and 2 Answer :D

Discussion

20.	Question : Theinteguments of theovuledevelopinto______.
Answer» SOLUTION :GENERATIVE

Discussion

21.	Question : The lymphoid tissue, located within the lining of digestive tract is
Answer» spleen Peyer's patches lymph nodes MALT. Solution :REFER to ANSWER 78

Discussion

22.	Question : What is the term for an integumented megasporangium.
Answer» ANSWER :OVULE

Discussion

23.	Question : The lymphoid organ that undergoes reduction in size with ageing is
Answer» LYMPH nodes Thymus Spleen Tonsils Answer :B

Discussion

24.	Question : The integral form of exponential growth equation is
Answer» `N_0 = N_t e^N` `dN//dt = rN ((K-N)/(K))` `N_t = N_(0) e^n` `N_t = N_0+ e^n` ANSWER :B

Discussion

25.	Question : The lungs of a rabbit are enclosed by a membrane called _________ .
Answer» cardiac muscle PLEURA pericardium MENINGES ANSWER :B

Discussion

26.	Question : The insulin produced using recombinant DNA trchnolgy is more advantageous than the insulin ectrated from pancreas of cattle and pis.How?
Answer» ANSWER :Issulin OBTAINED from ANIMAL SOURCE causes ALLERGY.

Discussion

27.	Question : The luteal (secretory) phase of the menstrual cycle is characterized by all of the following except :
Answer» A COILING or sacculation of ENDOMETRIAL glands Decreased AMOUNTS of progesterone in the BLOOD plasma The presence of a functional corpus luteum Atresia of some ovarian follicles Answer :C

Discussion

28.	Question : The integral form of exponential growth equation will be
Answer» `N_(0)=N_(t)e^(RT)` `N_(t)-N_(o)=e^(rt)` `N_(t)=N_(o)e^(rt)` `(N_(t))/(N_(o))=(1)/(e^(rt))` Answer :C

Discussion

29.	Question : The lowest temperature at which organism can live indefinitely is known as:
Answer» minimum CRITICAL TEMPERATURE minimum survival temperature minimum effective temperature incipient LETHAL LOW temperature Answer :A

Discussion

30.	Question : The instrument used to record the muscle twitch is:
Answer» Angiograph Kymograph Stethoscope None of these Answer :B

Discussion

31.	Question : The lowest water potential is found in the xylem channel of:
Answer» Stem Root Root HAIR zone Leaves Answer :D

Discussion

32.	Question : The instrument used I spectrophometry is
Answer» spectrophotometer microtome tracer None of these Answer :A

Discussion

33.	Question : The lower jaw of mammals is made up of
Answer» dentary maxilla angular articular Answer :A

Discussion

34.	Question :The innermost layer of wall layers is ___________
Answer» TAPETUM EPIDERMIS ENDODERMIS Endothecium Answer :A

Discussion

35.	Question : The inner most wall layer of microsporangium is tapetum. It is multinucleate. Justify the statement.
Answer» Solution :Out of four wall LAYERS of anther, tapetum is the innermost layer that nourshies the DEVELOPING pollen GRAINS.

Discussion

36.	Question : The loudness of a sound that a person can withstand without discomfort is about(A) 150 dB(B) 215 dB(C) 30 dB(D) 80 dB
Answer» 150 dB 215 dB 30 dB 80 dB ANSWER :D

Discussion

37.	Question : The innermost layer lining the lumen of the alimentary canal is the ______
Answer» ANSWER :MUCOSA

Discussion

38.	Question : The loss of water in C_4 plants compared to C_3 plants for the same amount of CO_2fixed is:
Answer» Half One third One-fourth Double Answer :B

Discussion

39.	Question : The inner mitochondrial membrane contains
Answer» Enzymes Electron carriers 70 S ribosomes Both (1) & (2) ANSWER :D

Discussion

40.	Question : The loss of positive ions from the interior of a neuron produces :
Answer» Depolarisation Threshold Hyperpolarisation Action Potential Answer :C

Discussion

41.	Question : The initial step in the digestion of milk in humans is carried out by
Answer» Lipase Trypsin Rennin Pepsin ANSWER :C

Discussion

42.	Question : The loss of energy as one proceeds from one trophic level to the next higher level is approximately
Answer» 0.3 0.4 0.6 0.9 Answer :D

Discussion

43.	Question : The initator codon is
Answer» AUG UAG UAA UGA ANSWER :A

Discussion

44.	Question : The inheritance patterns of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to
Answer» QUANTITATIVE trait Medelian trait Polygenic trait Meternal trait Answer :B

Discussion

45.	Question : The longest phase of mitosis is ____
Answer» ANSWER :PROPHASE

Discussion

46.	Question : The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to
Answer» Quantitative trait Mendelian trait Polygenic trait Maternal trait Solution :Character studied in the pedigree analysis is equivalent to Mendelian trait. = Quantitative TRAITS are those continuous traits which are often measured and given a quantitative value, e.g. weight of animal, crop yield, and etc. = Polygenic traits are the traits controlled by more than one gene.(eg.- human height) =Maternal traits are the traits INHERITED and expressed from maternal PARENT to the subsequent offspringdue to GENETIC variants of the mitochondria or chloroplast, which are generally TRANSMITTED via oocyte.

Discussion

47.	Question : The inheritance of A, B, O blood groups in humans is an example of
Answer» pleiotropism epistasis polygenic inheritance incomplete DOMINANCE

Discussion

48.	Question : The inherent maximum capacity of an organism to reproduce or increase in number is called as
Answer» (a) BIOTIC potential (B) Ecosystem (C) Population (d) Ecology ANSWER :A

Discussion

49.	Question : The longest gene present in human body is known as
Answer» DUCHENNE MUSCULAR dystrophy Testis DETERMINING factor Holandric gene None of the above Answer :A

Discussion

50.	Question : The inherent maximum capacity of organism to reproduce in number is termed as_____.
Answer» ANSWER :BIOTIC POTENTIAL

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

Question : The interferons are

Question : The main function of mammalian corpus luteum is to produce :

Question : The main function of intestinal villi is:

Question : The interaction where one species is benefitted and the other is neither benfitted nor harmed is called as :

Question : The true embryo develops from the structure formed as a result of fusion of :

Question : The interaction of species with the environment is called as

Question : The main difference between active and passive transport across cell membrane is :

Question : The main difference between white and yellow fibre is of

Question : The interaction in nature, where one gets benefit on the expense of other is…………. .

Question : The main constituent of cell wall in chlorophycean algae is______.

Question : The interaction between ruminants and the bacteria in intestine is …….. .

Question : The main challenge for production of insulin using rDNA techniques was -

Question : The main composition of fungal cell wall is___________.

Question : The intensity of whisper is around _________ decibels.

Question : The main constituent of biogas is _____.

Question : The integumentsof theovule enclose a openingcalled________.

Question : The main challenge for production of insulin peptide using rDNA technique was

Question : The intensity of sound is measured in

Question : The magnitude of following quantities increases when water starts entering into the cell

Question : Theinteguments of theovuledevelopinto______.

Question : The lymphoid tissue, located within the lining of digestive tract is

Question : What is the term for an integumented megasporangium.

Question : The lymphoid organ that undergoes reduction in size with ageing is

Question : The integral form of exponential growth equation is

Question : The lungs of a rabbit are enclosed by a membrane called _________ .

Question : The insulin produced using recombinant DNA trchnolgy is more advantageous than the insulin ectrated from pancreas of cattle and pis.How?

Question : The luteal (secretory) phase of the menstrual cycle is characterized by all of the following except :

Question : The integral form of exponential growth equation will be

Question : The lowest temperature at which organism can live indefinitely is known as:

Question : The instrument used to record the muscle twitch is:

Question : The lowest water potential is found in the xylem channel of:

Question : The instrument used I spectrophometry is

Question : The lower jaw of mammals is made up of

Question :The innermost layer of wall layers is ___________

Question : The inner most wall layer of microsporangium is tapetum. It is multinucleate. Justify the statement.

Question : The loudness of a sound that a person can withstand without discomfort is about(A) 150 dB(B) 215 dB(C) 30 dB(D) 80 dB

Question : The innermost layer lining the lumen of the alimentary canal is the ______

Question : The loss of water in C_4 plants compared to C_3 plants for the same amount of CO_2fixed is:

Question : The inner mitochondrial membrane contains

Question : The loss of positive ions from the interior of a neuron produces :

Question : The initial step in the digestion of milk in humans is carried out by

Question : The loss of energy as one proceeds from one trophic level to the next higher level is approximately

Question : The initator codon is

Question : The inheritance patterns of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to

Question : The longest phase of mitosis is ____

Question : The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to

Question : The inheritance of A, B, O blood groups in humans is an example of

Question : The inherent maximum capacity of an organism to reproduce or increase in number is called as

Question : The longest gene present in human body is known as

Question : The inherent maximum capacity of organism to reproduce in number is termed as_____.