24277 + Interview Questions in Biology in Class 12 Page 305 InterviewSolution

15201.	Question : In the following human pedigree the filled symbols, represent the affected individuals. Identify the type of given pedigree.
Answer» X-linked dominant Autosomal dominant X-linked rescessive Autosomal RECESSIVE trait Answer :D

Discussion

15202.	Question : In the following pedigreechart, the mutant trait is shaded black. The gene responsible for the trait is
Answer» dominant and sex linked dominant and autosomal RECESSIVE and sexlinked recessive and autosomal Solution :The given trait cannot be sex-linked as sex-linked traits follow criss-cross inheritance and in the given PEDIGREE, no criss-cross inheritance us being followed. The trait exhibited in pedigree chart is autosomal recessive. An autosomal recessive trait APPEARS in case of marriage between two heterozygous individuals `(Aa xx Aa = 3 Aa + 1 aa`), a recessive individual with hybrid `(Aa xx aa = 2 Aa + 2aa)` and two recessives `(aa xx aa = all aa)`. It expresses its effect only in pure or HOMOZYGOUS state If the trait had been controlled by dominant gene, then one of the PARENT must have possessed the dominant gene and hence the disease.

Discussion

15203.	Question : In the following human pedigree, the filled symbols represent the affected individuals.Identify the type of given pedigree. (##KPK_AIO_BIO_XII_C05_E06_113_Q01.png" width="80%">
Answer» AUTOSOMAL DOMINANT X-linked RECESSIVE Autosomal recessive X-linked dominant Solution :Autosomal recessive

Discussion

15204.	Question :In the following pedigree chart, state if the trait is autosomal dominant, autosomal recessive or sex linked. Give a reason for your answer:
Answer» Solution : Autosomal recessive as the disease is found in 50% both male and FEMALE offspring.

Discussion

15205.	Question : In the following pedigree chart, state if the trait is autosomal dominant, autosomal recessive or sex linked . Give a reason for your answer.
Answer» SOLUTION :AUTOSOMAL DOMINANT

Discussion

15206.	Question : In the following given options which one is mismatch?
Answer» Oxygen-Most abundant ELEMENT in human BODY as well as EARTH`s crust Retentate-Macromolecule containing INSOLUBLE fraction Proteins-Homopolymer Carotenoids-Secondary metabolites Answer :A

Discussion

15207.	Question : In the following figures, one is of the IUDs.
Answer» Solution :a. C. CuT (Copper T). b. The Cu ions released by the CuT SUPPRESS sperm MOTILITY and fertilising CAPACITY of SPERMS.

Discussion

15208.	Question : in the following figure
Answer» RUMINATE ENDOSPERM NUCLEAR endosperm HELOBIAL endosperm Cellular endosperm Answer :B

Discussion

15209.	Question : In the figure which option gives the correct identification
Answer» d-unicellular glandular epithelium , goblet CELLS , secrete saliva b-squamous epithelium , walls of blood vessels , form a DIFFUSION boundary a- cubidal epithelium , DUCTS of glands , secretion and absorption c-columnar epithelium , lining of stomach , secreion and absorbtion. Answer :D

Discussion

15210.	Question : In the figure, structure of an antibody molecule is shown, Observe it and Give the answer of the following questions.(i) Label the parts A,B and C.(ii)Which cells produce these chemicals?(iii) State the function of these molecules.
Answer» SOLUTION :(a) A-Antrigen BINDING, B-light CHAIN, C-HEAVY chain (b) B-lymphocytes. © Heavy chain (d) ANTIBODIES provide acquired immune response.

Discussion

15211.	Question : In the figure, structure of an antibody molecule is shown. Name the parts labelled as A, B and C.
Answer» Solution :A = Variable REGION of light CHAIN B = Constant region of light chain C = Constant REGIONS of HEAVY chain

Discussion

15212.	Question : In the figure, structure of an antibody molecule is shown Name the part A, B and C : -
Answer» ANSWER :D

Discussion

15213.	Question : In the figure, identify the tropical forest and coniferous forest from the markings A-F select the correct option
Answer» A and B B and D C and E C and F Answer :C

Discussion

15214.	Question : In the figure given below the plant bears two different types of flowers marked .A. and .B.. Identify the types of flowers and state the type of pollination that will occur in them.
Answer» Solution : .A. is chasmogamous flower while .B. is cleistrogamous flower. A bisexual flower which normally open is called chasmogamous flower. Cleistogamous flowers do not open at all. Cleistogamous flowers are INVARIABLY autogamous as there is no CHANCE of cross - POLLEN landing on the stigma. In a normal flower which opens and EXPOSES the anthers and stigma cmplete autogamy is rather RATE. Chasmogamous flower may show autogamy, geithonogamy or xenogamy.

Discussion

15215.	Question : In the figure given below, mark the ovule and pericarp.
Answer» SOLUTION :

Discussion

15216.	Question : In the fermentation process, what does uptream and downstream refers to ? Explain.
Answer» SOLUTION :All the process before starting of the fermenter such sterilization of the fermenter, preparation and sterilization of culture medium and growth of the suitable INOCULUM are CALLED upstream process. Downsterm process. All the process after the fermentation process is known as the downstream process. This process includes distillation , centrifugin , filtration and solvent extraction . Mostly this process INVOLVES the purification of desired PRODUCT.

Discussion

15217.	Question : In the figure given below label the following parts: male gametes, egg cell, polar nuclei, synergid and pollen tube
Answer» SOLUTION :

Discussion

15218.	Question : In the fertilizers are added to water :
Answer» PLANTS will die Eutrophication will occur Fish POPULATION will increase Animal COMMUNITY will increase Answer :B

Discussion

15219.	Question : In the female which structure is homologous to penis of male :-
Answer» CERVIX Vagina Uterus CLITORIS ANSWER :D

Discussion

15220.	Question : In the experiment in given diagram which of the following groups of gases were used to simulate primitive atmosphere?
Answer» `N_(2),H_(2),CH_(4),C_(2)H_(6)` `NH_(3),H_(2)O, CH_(4),H_(2)` `N_(2)O,H_(2)O,NO_(2),SO_(2)` `CH_(4),H_(2),NO_(2),SO_(2)` ANSWER :B

Discussion

15221.	Question : In the F_2 generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are
Answer» Phenotypes-4, genotypes-16 Phenotypes-9, genotypes-4 Phenotypes-4, genotypes-8 Phenotypes-4, genotypes-9 Answer :D

Discussion

15222.	Question : In the F_(2) generation fo a mendelian dihybrid cross, the number of phenotype and genotypes are
Answer» Phenotpes-4,genotypes-16 Phenotypes-9,genotypes-4 Phenotypes-4,genotypes-8 Phenotypes-4,genotypes-9 Answer :D

Discussion

15223.	Question : In the evolution of man which was more ape like form?
Answer» DRYOPITHECUS Ramapithecus Australopithecus Vestigial organs Answer :A

Discussion

15224.	Question : In the evolution of man which of the following forms spread through Africa and were the first to leave Africa?
Answer» DRYOPITHECUS and Ramapithecus HOMO ERECTUS and Homo ergaster Homo habilis Australopithecus ANSWER :B

Discussion

15225.	Question : In the evolution of man, the first cave paintings were made by
Answer» NEANDERTHAL MAN Java man Peking man Cro-Magnon man ANSWER :D

Discussion

15226.	Question : In the event of global warming, which one of the following is most likely to occur ?
Answer» Existing plant and animal communities will move North in REPONSE to warming. Agriculture in the Prairie provinces will be redeveloped on soils of the Canadian Shield. The anticipated rise in sea level will be caused primarily by the melting of polar ice caps. The decomposition of organic matter in the unfrozen surface layer of polar soils will increase. Solution :It is believed that increase in concentration of greenhouse gases has resulted in rise of atmospheric temperature which is slight in tropics, moderate in middle latitudes and maximum in polar regions. Global warming could raise sea level due to thermal expansion of sea water, melting of glaciers and Greenland ice sheet.There is a danger of submersion of large area s one third of human population lives within 60 KM of coastline. Coastal salt MARSHES and estuaries, wetlands, drylands, freshwater supplies, FISHERIES, fish breding areas and other types of wildlife will undergo extinction.

Discussion

15227.	Question : In the ETC, the final cytochrome acting as electron acceptor is:
Answer» CYTOCHROME B Cytochrome a Cytochrome a3 O2 Answer :D

Discussion

15228.	Question : In the equation N_(t)=N_(0)e^(tt),'e' is
Answer» Population density after the time 'F' Population density at the time zero Intrinsic RATE of natural INCREASE The BASE of natural logarithm Answer :D

Discussion

15229.	Question : In the equation GPP - R = NPP. Explain.
Answer» SOLUTION :GPP is gross primary productivity that is the rate of total production of biomass by PRODUCERS. R is the respiratiory loss. A part of biomass PRODUCED by the plant UTILIZED by them for their respiration. NPP is the balance of biomass or energy REMAINING after meeting the cost of respiration of producers.

Discussion

15230.	Question : In the equation for S-shaped population growth, represents
Answer» Carrying capacity Environmental resistance Biotic POTENTIAL POPULATION SIZE ANSWER :C

Discussion

15231.	Question : In the embryos of a typical dicot and a grass, true homologous structures are
Answer» COLEORHIZA and coleoptile Coleoptile and scutellum Cotyledons and scutellum Hypocotyl and radicle Answer :C

Discussion

15232.	Question : In the earockle disease of Wheat, the pathogen is
Answer» SOIL BORNE SEED borne Air borne Water borne Answer :B

Discussion

15233.	Question : In the embryos of a typical dicot and a grass, true homologous structures are(A) Coleorhiza and coleoptile(B) Coleoptile and scutellum(C) Cotyledons and scutellum(D) Hypocotyl and radicle
Answer» Coleorhiza and coleoptile Coleoptile and scutellum Cotyledons and scutellum Hypocotyl and radicle Solution :Typical dicot embryo POSSESS TWO cotyledons while monocot plant POSSESSES single cotyledons which is CALLED scutellum

Discussion

15234.	Question : In the early, water CO_(2) were produced by the combination of O_(2) with
Answer» AMMONIA and methane Hydrogen Organic matter Sulphates and nitrates Answer :A

Discussion

15235.	Question : In the early earth, organic acids were produced by the combination of H_2 with
Answer» Ammonia and methane HYDROGEN ORGANIC MATTER SULPHATES and nitrates Solution : Ammonia and methane

Discussion

15236.	Question : In the E-waste generated by the Mobile Phones, which among the following metal is most abundant?
Answer» COPPER Silver Palladium Gold Solution :Copper

Discussion

15237.	Question : In the DNA molecule:
Answer» The PROPORTION of adenine in relation to thymine varies with the organism There area two strands which run ANTIPARALLEL one in `5^'rarr3^'` direction and other in `3^'rarr5^' ` The total amount of purine NUCLEOTIDES and pyrimidine nucleotides is not ALWAYS equal. there are two strands which run parallel in the `5^'rarr3^'` Answer :B

Discussion

15238.	Question : In the dictionary of genetic condons, how many codons are these of 20 amino acids ?
Answer» 60 20 64 61 Solution :61

Discussion

15239.	Question : In the diagram of types of placentationa, b, c and d represent
Answer» Basal, AXILE, parietal and FREE central Free central, Paritetal, BASEL and axile Axili, basal, parietal and free central Parietal, axile,free,central and basal Answer :C

Discussion

15240.	Question : Match the following
Answer» ANSWER :B

Discussion

15241.	Question : In the diagram of section of Graafian follicle. Different parts are indicated by alphabeta. Choose the correct combination
Answer» a-membrana GRANULOSA, B-theca INTERNA,c-ovum,d-cumulus oophorus, e-antrum,f-theca EXTERNA. a-theca externa, b-theca interna, c-ovum d-membrana granulosa,e-antrum,f-cumulus oophorus a-theca externa, b-theca interna, c-ovum, d-cumulus oophorus, e-antrum,f-membrana granulosa a-membrana granulosa,b-theca externa,c-ovum,d-cumulus oophorus,e-antrum,f-theca interna. ANSWER :B

Discussion

15242.	Question : In the diagram of section of Graffian follicle, different parts are indicated by alphabets . Choose the answer in which these alphabets have been correctly matched with the parts they indicate.
Answer» A=Membrane granulosa : B=Theca interna, C = Ovum, D = Cumulus oophorus : E = Anturm, F = Theca externa A =Theca externa, B = Theca interna, C = Ovum, D = Membrana granulosa, E = Anturm, F= Cumulus oophorus. A= Theca externa , B = Theca interna, C = OVEM, D = Cumulus oophorus, E = Antrum, F = membrna granulosa A= Membrane granulosa, B= Theca externa, C= Ovum, D = Cumulus oophorus, E = Antrum, F= Theca intena Answer :C

Discussion

15243.	Question : In the diagram of human male reproductive system, the different parts have been indicated by alphabets. Choose the correct match.
Answer» ANSWER :B

Discussion

15244.	Question : Name the embryonic stage that gets implanted in the uterine wall of human female.
Answer» ANSWER :A

Discussion

15245.	Question : In the diagram given below, show the path of a pollen tube from the pollen on the stigma into the embryo sac. Name the components of egg apparatus
Answer» Solution :After properly suitable POLLINATION, pollen grain germinates on anther and out of all germpores, pollen tube is produced in one of the germpore. The fluid of pollen grain along with two nuclei located in pollen grain reaches to pollen tube. Pollen tube grows by PASSING from the tissue of anther. When it enters into embryo sac by micropyle at that time pollen tube enters by filiform appraratus then a synergid cell decomposes. Pollen tube breaks to release its material located in pollen tube. Two MALE GAMETES are released. Among them one does syngamy with egg cell and other male gemete perform syngamy with central cell thus is gets fertilised. Two synergid cells, an egg cell and filiforms apparatus are PRESENT as parts of egg apparatus located in embryo sac

Discussion

15246.	Question : In the developmental history of mammalian heart. It is observed that it passes through a two chambered fish like heart, three chambered frog like heart and finally four chambered stage. To which hypothesis can this above cited statement be approximated?
Answer» Lamrack's principle Mendelian principle BIOGENETIC LAW HARDY Weinberg law Solution :Biogenetic law or Recaptiulation theory was given by Ernst HAECKEL in 1866. It states that ontogeny repeasts phylogeny. Ontogeny is the life history of an ORGANISM while phylogeny is the evolutionary history of an organism while organism. This means that an organism repeats its ancestral history during its development.

Discussion

15247.	Question : In the diagram give n below shaded part represents :-
Answer» DEAD cells Permanent tissue Meristematic cells Lignified cells Answer :C

Discussion

15248.	Question : In the development of male gametophyte, the nucleus of pollen divides mitotically and produce large nucleus is called……(A) antipodal cell(B) Vegetative cell(C) Generative cell(D) Synergids + secondary nucleus
Answer» ANTIPODAL cell Vegetative cell Generative cell Synergids `+` SECONDARY nucleus Answer :B

Discussion

15249.	Question : In the crop Bt cotton, Bt stands for Biotechnology.
Answer» ANSWER :A::B::C

Discussion

15250.	Question : In the context of genetic engineering, what do you mean by 'vehicle'?
Answer» SOLUTION :It is SUBSTITUTE for VECTOR that TRANSPORTS the GENE

Discussion

Explore topic-wise InterviewSolutions in .

Question : In the following human pedigree the filled symbols, represent the affected individuals. Identify the type of given pedigree.

Question : In the following pedigreechart, the mutant trait is shaded black. The gene responsible for the trait is

Question : In the following human pedigree, the filled symbols represent the affected individuals.Identify the type of given pedigree. (##KPK_AIO_BIO_XII_C05_E06_113_Q01.png" width="80%">

Question :In the following pedigree chart, state if the trait is autosomal dominant, autosomal recessive or sex linked. Give a reason for your answer:

Question : In the following pedigree chart, state if the trait is autosomal dominant, autosomal recessive or sex linked . Give a reason for your answer.

Question : In the following given options which one is mismatch?

Question : In the following figures, one is of the IUDs.

Question : in the following figure

Question : In the figure which option gives the correct identification

Question : In the figure, structure of an antibody molecule is shown, Observe it and Give the answer of the following questions.(i) Label the parts A,B and C.(ii)Which cells produce these chemicals?(iii) State the function of these molecules.

Question : In the figure, structure of an antibody molecule is shown. Name the parts labelled as A, B and C.

Question : In the figure, structure of an antibody molecule is shown Name the part A, B and C : -

Question : In the figure, identify the tropical forest and coniferous forest from the markings A-F select the correct option

Question : In the figure given below the plant bears two different types of flowers marked .A. and .B.. Identify the types of flowers and state the type of pollination that will occur in them.

Question : In the figure given below, mark the ovule and pericarp.

Question : In the fermentation process, what does uptream and downstream refers to ? Explain.

Question : In the figure given below label the following parts: male gametes, egg cell, polar nuclei, synergid and pollen tube

Question : In the fertilizers are added to water :

Question : In the female which structure is homologous to penis of male :-

Question : In the experiment in given diagram which of the following groups of gases were used to simulate primitive atmosphere?

Question : In the F_2 generation of a Mendelian dihybrid cross, the number of phenotypes and genotypes are

Question : In the F_(2) generation fo a mendelian dihybrid cross, the number of phenotype and genotypes are

Question : In the evolution of man which was more ape like form?

Question : In the evolution of man which of the following forms spread through Africa and were the first to leave Africa?

Question : In the evolution of man, the first cave paintings were made by

Question : In the event of global warming, which one of the following is most likely to occur ?

Question : In the ETC, the final cytochrome acting as electron acceptor is:

Question : In the equation N_(t)=N_(0)e^(tt),'e' is

Question : In the equation GPP - R = NPP. Explain.

Question : In the equation for S-shaped population growth, represents

Question : In the embryos of a typical dicot and a grass, true homologous structures are

Question : In the earockle disease of Wheat, the pathogen is

Question : In the embryos of a typical dicot and a grass, true homologous structures are(A) Coleorhiza and coleoptile(B) Coleoptile and scutellum(C) Cotyledons and scutellum(D) Hypocotyl and radicle

Question : In the early, water CO_(2) were produced by the combination of O_(2) with

Question : In the early earth, organic acids were produced by the combination of H_2 with

Question : In the E-waste generated by the Mobile Phones, which among the following metal is most abundant?

Question : In the DNA molecule:

Question : In the dictionary of genetic condons, how many codons are these of 20 amino acids ?

Question : In the diagram of types of placentationa, b, c and d represent

Question : Match the following

Question : In the diagram of section of Graafian follicle. Different parts are indicated by alphabeta. Choose the correct combination

Question : In the diagram of section of Graffian follicle, different parts are indicated by alphabets . Choose the answer in which these alphabets have been correctly matched with the parts they indicate.

Question : In the diagram of human male reproductive system, the different parts have been indicated by alphabets. Choose the correct match.

Question : Name the embryonic stage that gets implanted in the uterine wall of human female.

Question : In the diagram given below, show the path of a pollen tube from the pollen on the stigma into the embryo sac. Name the components of egg apparatus

Question : In the developmental history of mammalian heart. It is observed that it passes through a two chambered fish like heart, three chambered frog like heart and finally four chambered stage. To which hypothesis can this above cited statement be approximated?

Question : In the diagram give n below shaded part represents :-

Question : In the development of male gametophyte, the nucleus of pollen divides mitotically and produce large nucleus is called……(A) antipodal cell(B) Vegetative cell(C) Generative cell(D) Synergids + secondary nucleus

Question : In the crop Bt cotton, Bt stands for Biotechnology.

Question : In the context of genetic engineering, what do you mean by 'vehicle'?