24277 + Interview Questions in Biology in Class 12 Page 453 InterviewSolution

22601.	Question : Accurate mapping of genes can be done by three point test cross because increases
Answer» POSSIBILITY of SINGLE CROSS over Possibility of DOUBLECROSS over Possibility of multiplecross over Possibility of recombinationfrequency Answer :B

Discussion

22602.	Question : Accroding to Allen's Rule ,the mammals from colder climates have:
Answer» shorter ears abd LONGER LIMBS longer ears and shorter limbs longer ears and longer limbs shorter ears and longer limbs Answer :C

Discussion

22603.	Question : Accumulation of lactic acid in muscles
Answer» Lowers `P^H` INCREASE pH Is GOOD for health Removes fatigue ANSWER :A

Discussion

22604.	Question : According to Histogen theory, plerome gives rise to:
Answer» Epidermis Hypodermis Vsacular bundles External hairs Answer :C

Discussion

22605.	Question : According to Whittaker, kingdom plantae include all
Answer» UNICELLULAR, EUKARYOTIC AUTOTROPHIC plants Multicellular, eukaryotic, autotrophic plants Multicellular, eukaryotic organism Unicellular/multicellular eukaryotic autotrophic plants Answer :B

Discussion

22606.	Question : According to WHO , India is the …………….largest HIV affected country .
Answer» first second THIRD seventh SOLUTION : third

Discussion

22607.	Question : According to which phylogenetic system , dicots are advance with sympetalae conditions ?
Answer» BENTHAM & Hooker's Engler & Prantl Hutchinson Takhtajan Answer :B

Discussion

22608.	Question : According to wear and tear theory abscission occurs due to loss of activity and cells undergo wear and tear due to disintegration of
Answer» ANSWER :SENESCENCE

Discussion

22609.	Question : According to the WHO,What is health?
Answer» Solution :The WORLD Health ORGANIZATION [WHO] DEFINES health as .a state of complete physical,mental and social wllbeing and LOT merely absence of DISEASES..

Discussion

22610.	Question : The theory of spontaneous generation or abiogenesis was disproved by
Answer» COSMIC PARTICLES Non-living MATERIALS Coacervates SEA SOLUTION : Non-living materials

Discussion

22611.	Question : According to the theory of abiogenesis, life originates from
Answer» Non-living SPONTANEOUSLY CHEMICAL Other PLANETS ANSWER :A

Discussion

22612.	Question : According to the IUCN (2004) the number of species on the earth that dominates
Answer» plants animals bacteria plants Answer :B

Discussion

22613.	Question : According to the latest estimates, how many documented varieties of Basmati rice are grown in India ?
Answer» 30 27 118 125 Answer :B

Discussion

22614.	Question : According to the Induced Fit Hypothesis, which part of the enzyme's active site comes opposite to the substrate to catalyse changes in it?
Answer» BUTTRESSING group CATALYTIC group Allosteric group Either buttressing or catalytic group Answer :B

Discussion

22615.	Question : According to the Hardy-Weinberg principle, the allele frequency of a population remains costant. How do you interpret the change of frequency of alleles in a population ?
Answer» Solution :CHANGES of FREQUENCY of allele in a POPULATION will RESULT in natural selection leading to EVOLUTION.

Discussion

22616.	Question : According to the chemiosmotic hypothesis, the photosynthetic ATP formation occurs during the movement of protons from
Answer» THYLAKOID lumen into the stroma through.`F_0 - F_1`complex ( ATP SYNTHASE complex ) stroma into the thylakoid lumen Intermembrane space to MITOCHONDRIAL matrix through `F_0 - F_1`complex Both ( 1) & (3) Answer :A

Discussion

22617.	Question : According to the Central Pollution Control Board, the diameter of particles that are responsible for causing great harm to human health is(A) 2.5 micrometer(B) 5.0 micrometer(C) 10.0 micrometer(D) 7.5 micrometer
Answer» 2.5 micrometer 5.0 micrometer 10.0 micrometer 7.5 micrometer Solution :According to CPCB (CENTRAL POLLUTION Control Board) particulate SIZE 2.5 micrometer or less in diameter (PM 2.5) are responsible for causing the greatest harm to human health. These fine particulates reach to the lungs and causes respiratory problems, irritation, inflammation of lungs and may CAUSE premature death.

Discussion

22618.	Question : According to the central pollution control Board PM 2.5 are responsible for causing the greatest harm to human health. PM 2.5 stands for
Answer» PARTICULATE matter which are 2.5 MICROMETERS or less in DIAMETER Particulate matter which are 2.5 micrometers or more in diameter Particulate matter which are 2.5 nanometersor less in diameter Particulate matter which are 2.5 nanometersor more in diameter ANSWER :A

Discussion

22619.	Question : According to the Central Pollution Control board , particles that are responsible for causing great Harm to human health are of diameter
Answer» 2.50 micrometers 5.00 micrometers 10.00 micrometers 7.5 micrometers Answer :A

Discussion

22620.	Question : A woman who is homozygous for Incontinentia pigmenti is married to a normal man. In their children, IP apprars in
Answer» only sons 50% of chilren Only daughters All the children Answer :D

Discussion

22621.	Question : According to the 2011 census report, the population growth rate was
Answer» 200/1000/year 70/1000/year 10/1000/year 20/1000/year Solution :The population growth rate was LESS than 2% ACCORDING to the 2011 census report, the population growth rate was less than 2%, i.e., 20/1000/year. Our population which was approximately 350 million at the time of our independence reached close to the billion MARK by 2000 and crossed 1.2 billion in may 2011

Discussion

22622.	Question : According to Steward, ATP is used in stomatal mechanism during
Answer» OPENING CLOSING Both (a) and (B) NONE of these Answer :A

Discussion

22623.	Question : A woman travels in a crowded compartment along with people suffering from diabetes, influenza and amoebiasis. With which one of these disease is she most likely to be infected during the journey and why?
Answer» SOLUTION :She has CHANCES of getting infected with influenza because it is an air-borne communicable disease.

Discussion

22624.	Question : According to some early Greek philosophers life can transfer from planet to planet in form of a unit. These units are called as:
Answer» Spores Sperms Pangenes Protobiont Answer :A

Discussion

22625.	Question : A woman of normal vision whose father was colourblind, marries a man of normal vision, whose father was also colourblind. The sons of this marriage would be :-
Answer» All normal All colourblind 50% colourblind 100% colourblind Answer :C

Discussion

22626.	Question : According to ten percent law, how many Joules of energy does the individuals at the fourth level will receive, if the individuals at first trophic level receives 1000 Joules of energy?
Answer» Solution :ORGANISM at `T_4` LEVEL will receive 0.1 Joule of energy as PER TEN percent law.

Discussion

22627.	Question : A woman is married for the second time. Her first husband was ABO blood type A, and her child by that marriage was type O. Her new husband is type B and their child is type AB. What is the woman's ABO genotype and blood type ?
Answer» `I^AI^0` , BLOOD TYPE A `I^AI^B` , Blood type AB `I^BI^O` , Blood type B `I^OI^O` , Blood type O Answer :A

Discussion

22628.	Question : According to Seth Wright effect ………………. .
Answer» GENE FREQUENCY remains constant in SMALL population. Gene frequency fluctuates in LARGE population. Gene frequency remains constant in large population. Gene frequency fluctuates in small population. SOLUTION :Gene frequency fluctuates in small population.

Discussion

22629.	Question : According to Robert May's global estimate only _____________ of the total species have been recorded so far .
Answer» 22 58 33 50 Answer :A

Discussion

22630.	Question : According to Robert Constanza average price tag for ecosystem services is
Answer» US $ 18 trillion US $ 33 trillion US $ 180 trillion US $ 13 trillion ANSWER :C

Discussion

22631.	Question :According to Robert May , the global species diversity is about :
Answer» 7 MILLION 12 million 50 milion 20 million Answer :A

Discussion

22632.	Question : A woman has certain queries as listed below, before starting with contraceptive pills. Answer them. (a) What do contraceptive pills contain and how do they act as contraceptives ? (b) What schedule should be followed for taking these pills ?
Answer» Solution :(i) Oral Contraeptive Pills : combined oral contraceptive pills or birth control pills CONTAIN two hormones-estrogen and progesterone or progesterone only pills that contain progestogens. They have two functions. The main one is to prevent ovulation. The second function is to disrupt the normal growth of the INTERNAL lining (endometrium ) so that the embryo cannot implant in it as also the alteration of CERVICAL mucus to prevent sperm entry. (b) The pills have to be taken daily for a period of 21 days STARTING within the first conception is REQUIRED.

Discussion

22633.	Question : According to Robert May, the global species diversity is about:
Answer» 18 million 7 million 1.5 million 1.7 million Answer :B

Discussion

22634.	Question : A woman accidentally touched are hot pan without wearing a pair of mittens . On contact she immediately yanksher hand away. Select the CORRECTstatement with respect to to above phenomenon.
Answer» The single RECEIVED from the sensory ORGAN is carried into the PNS. The EFFERENT NEURON RECEIVES the signal form sensory organ. The impulse is transported via a dorsal nerve root to the spinal cord. The impulse is transported via a dorsal nerve root to the PNS Answer :C

Discussion

22635.	Question : A woman has an X-linked condition on one of her X-chromosomes. This chromosome can be inherited by
Answer» Both SONS and DAUGHTERS Only daughters Only grandchildren Only sons Solution : Both sons and daughters

Discussion

22636.	Question : According to Rivel popper hypothesis, rivets on the wings represent
Answer» species with larger body SIZE KEY species species that drivemajor ECOSYSTEM function both (2) & (3) ANSWER :D

Discussion

22637.	Question : (a) Why is haemophilia generally observed in human males ? Explain the conditions under which a human female can be haemophilic. (b) Draw the male Reproductive system.
Answer» Solution :(a) Haemophilia is caused DUE to the recessive GENE on X-chromosome. Y has no ailele for this. If a male is` X^hY`, then he ishaemophilic. If male inherits Xh from the mother, he Will be haemophilic (with the genotype `X^hY`) If female inherits `X^hX`", one from the carrier mother and one from her haemophilic féther, then she can be haemophilic (B) For diagram please SEE Q. No. 29. (a).

Discussion

22638.	Question : (a) Why is haemophilia generally observed in human males? Explain the conditions under which a human female can be haemophilic. (b) A pregnant human female was advised to undergo MTP. It was diagnosed by her doctor that the foetus she is carrying has developed from a zygote formed by an XX-egg fertilized by Y-carrying sperm. Why was she advised to undergo MTP?
Answer» Solution :(a) The genes for haemophilia are present on the X-chromosome. A male has only one X chromosome and bears only one allele for the trait. He is hemizygous for the trait as Y chromosome does not have a CORRESPONDING allele A female contains two X-chromosomes. She has to be homozygous recessive It means her father must be a sufferer and mother either a carrier or sufferer to be AFFECTED by the disease. (B) The ZYGOTE will have XXY-chromosomes. It will develop into a male with Klinefelter's syndrome. Such males are sterile and show FEMININE characters. That is why the female is advised to undergo MTP

Discussion

22639.	Question : A wild life protection act was established in 2012.
Answer» ANSWER :1972

Discussion

22640.	Question : A widely used fusogen in protoplast culture is …………………
Answer» a) Polymethyl GLYCOL POLYETHYLENE glycol C) Polyethylene chloride d) Polyvinyl chloride ANSWER :B

Discussion

22641.	Question : (a) Why is fertilisation in an angiosperm referred to as double fertilisation? Menyion the ploidy of the cell involved. (b) Draw a neat labelled sketch of L.S. or an ondhapermous monoéot seed.
Answer» Solution :(a) The fertilisation m an angiosperm is called double fertilisation because fertilisammof haploid egg cell by one haploid male GAMETE to form diploid zygote leads to syngamy. Fertilisation of two (diploid) POLAR nuclei by the other haploid male gamete to form TRIPLOID primary endosperm nucleus leads to triple FUSION.

Discussion

22642.	Question : Accordingto recentstudieson competitionit is statedthat speciesfacingcompetitionmightevolvemechanismsthat promotecoexistenceratherthanexclusionExplainthiswiththe exampleofresourcepartitioning
Answer» SOLUTION :If twospeciescompetefor thesameresourcetheycouldaviodcompetitionby choosingfor INSTANCE DIFFERENT TIMES forfeedinga different foragingpatterns.

Discussion

22643.	Question : (a) Whichconservationmethod is used tomaintainspecies ofwildlifein theirnaturalhabitats ? (b) Given at least two differencesbetween a national park and wildlife sanctuary.
Answer» SOLUTION :(a) In-situ CONSERVATION

Discussion

22644.	Question : According to oparin, which one of the following was not present in the primitive atmosphere of the earth ?
Answer» METHANE OXYGEN Hydrogen WATER vapour Solution :Oxygen

Discussion

22645.	Question : A white fruit colour of summer squash plant of genotype WwYy is crossed with plant having genotype wwyy then :-
Answer» 25% offspring will have yellow fruits All PROGENY plant having WHITE fruits 75% plant have white fruits 6.25% plant have GREEN fruits Answer :A

Discussion

22646.	Question : [A]: When RH positive male marries RH negative woman the situation can be seri- ous. [R]: Genes linked to homologous part of X and Y chromosome behaves as autosomal genes.
Answer» If both A and R are TRUE and R is the CORRECT EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false Answer :B

Discussion

22647.	Question : According to Oparin's theory which of the following gases were not present in the atmosphere
Answer» `O_(2)` `N_(2)` `NH_(3)` `CH_(4)` Answer :A

Discussion

22648.	Question : A : When unwanted substances are added into water they make water impure. R : The reason behind water pollution is accumulation of plants and animals.(A) Both A and R are true and R is correct explanation of A(B) Both A and R are true but R is not correct explanation of A(C) A is true but R is false.(D) A is false but R is true. (E) Both A and R are false.
Answer» Both A and R are true and R is correct EXPLANATION of A Both A and R are true but R is not correct explanation of A A is true but R is false. A is false but R is true. (E) Both A and R are false. Answer :C

Discussion

22649.	Question : According to Morgan, when the two genes in a dihybrid cross were situated on the same chromosome
Answer» The proportion of PARENT gene combinations were much higher than the non-PARENTAL type The proportion of parent gave combination were lower than the non- parental type the proportion of parent and non-parental combinations were equal Either (b) or (c) Answer :A

Discussion

22650.	Question : (a) When and where does spermatogenesis occur in human male ? (b) Draw a diagram of a mature human male gamete ,Label the following parts : acrosome, middle piece and tail mention the function of acrosome and middle piece
Answer» Solution :(a) In tests , the immature MALE germ (spermatogonia) produce sperms by spermatogenesis that begin at puberty. (b) See Q.29,(or) Set-III , Delhi Board-2009 Functtion of ACROSOME: A PLASMA members envelops the whole body of SPERM . The sperm head CONTAINS an elongated haploid nucels , the anterior portion of which is covered by a cap-like structure called acrosome . The acrosome is filled with enymes that help fertilise te ovum . Funcultion of middle piece : Middle piece dcontains a number of mitochondria , that provide energy for the motility of sperms.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Accurate mapping of genes can be done by three point test cross because increases

Question : Accroding to Allen's Rule ,the mammals from colder climates have:

Question : Accumulation of lactic acid in muscles

Question : According to Histogen theory, plerome gives rise to:

Question : According to Whittaker, kingdom plantae include all

Question : According to WHO , India is the …………….largest HIV affected country .

Question : According to which phylogenetic system , dicots are advance with sympetalae conditions ?

Question : According to wear and tear theory abscission occurs due to loss of activity and cells undergo wear and tear due to disintegration of

Question : According to the WHO,What is health?

Question : The theory of spontaneous generation or abiogenesis was disproved by

Question : According to the theory of abiogenesis, life originates from

Question : According to the IUCN (2004) the number of species on the earth that dominates

Question : According to the latest estimates, how many documented varieties of Basmati rice are grown in India ?

Question : According to the Induced Fit Hypothesis, which part of the enzyme's active site comes opposite to the substrate to catalyse changes in it?

Question : According to the Hardy-Weinberg principle, the allele frequency of a population remains costant. How do you interpret the change of frequency of alleles in a population ?

Question : According to the chemiosmotic hypothesis, the photosynthetic ATP formation occurs during the movement of protons from

Question : According to the Central Pollution Control Board, the diameter of particles that are responsible for causing great harm to human health is(A) 2.5 micrometer(B) 5.0 micrometer(C) 10.0 micrometer(D) 7.5 micrometer

Question : According to the central pollution control Board PM 2.5 are responsible for causing the greatest harm to human health. PM 2.5 stands for

Question : According to the Central Pollution Control board , particles that are responsible for causing great Harm to human health are of diameter

Question : A woman who is homozygous for Incontinentia pigmenti is married to a normal man. In their children, IP apprars in

Question : According to the 2011 census report, the population growth rate was

Question : According to Steward, ATP is used in stomatal mechanism during

Question : A woman travels in a crowded compartment along with people suffering from diabetes, influenza and amoebiasis. With which one of these disease is she most likely to be infected during the journey and why?

Question : According to some early Greek philosophers life can transfer from planet to planet in form of a unit. These units are called as:

Question : A woman of normal vision whose father was colourblind, marries a man of normal vision, whose father was also colourblind. The sons of this marriage would be :-

Question : According to ten percent law, how many Joules of energy does the individuals at the fourth level will receive, if the individuals at first trophic level receives 1000 Joules of energy?

Question : A woman is married for the second time. Her first husband was ABO blood type A, and her child by that marriage was type O. Her new husband is type B and their child is type AB. What is the woman's ABO genotype and blood type ?

Question : According to Seth Wright effect ………………. .

Question : According to Robert May's global estimate only _____________ of the total species have been recorded so far .

Question : According to Robert Constanza average price tag for ecosystem services is

Question :According to Robert May , the global species diversity is about :

Question : A woman has certain queries as listed below, before starting with contraceptive pills. Answer them. (a) What do contraceptive pills contain and how do they act as contraceptives ? (b) What schedule should be followed for taking these pills ?

Question : According to Robert May, the global species diversity is about:

Question : A woman accidentally touched are hot pan without wearing a pair of mittens . On contact she immediately yanksher hand away. Select the CORRECTstatement with respect to to above phenomenon.

Question : A woman has an X-linked condition on one of her X-chromosomes. This chromosome can be inherited by

Question : According to Rivel popper hypothesis, rivets on the wings represent

Question : (a) Why is haemophilia generally observed in human males ? Explain the conditions under which a human female can be haemophilic. (b) Draw the male Reproductive system.

Question : A wild life protection act was established in 2012.

Question : A widely used fusogen in protoplast culture is …………………

Question : (a) Why is fertilisation in an angiosperm referred to as double fertilisation? Menyion the ploidy of the cell involved. (b) Draw a neat labelled sketch of L.S. or an ondhapermous monoéot seed.

Question : Accordingto recentstudieson competitionit is statedthat speciesfacingcompetitionmightevolvemechanismsthat promotecoexistenceratherthanexclusionExplainthiswiththe exampleofresourcepartitioning

Question : (a) Whichconservationmethod is used tomaintainspecies ofwildlifein theirnaturalhabitats ? (b) Given at least two differencesbetween a national park and wildlife sanctuary.

Question : According to oparin, which one of the following was not present in the primitive atmosphere of the earth ?

Question : A white fruit colour of summer squash plant of genotype WwYy is crossed with plant having genotype wwyy then :-

Question : [A]: When RH positive male marries RH negative woman the situation can be seri- ous. [R]: Genes linked to homologous part of X and Y chromosome behaves as autosomal genes.

Question : According to Oparin's theory which of the following gases were not present in the atmosphere

Question : According to Morgan, when the two genes in a dihybrid cross were situated on the same chromosome

Question : (a) When and where does spermatogenesis occur in human male ? (b) Draw a diagram of a mature human male gamete ,Label the following parts : acrosome, middle piece and tail mention the function of acrosome and middle piece