24277 + Interview Questions in Biology in Class 12 Page 235 InterviewSolution

11701.	Question : Name the structure of embryo sac that guides the entry of pollen tube into it.
Answer» SOLUTION :FILIFORM APPARATUS

Discussion

11702.	Question : Name the structural and functional unit of the liver.
Answer» ANSWER :HEPATIC LOBULE

Discussion

11703.	Question : Name the strand of DNA which is not transcribed
Answer» SOLUTION :CODING STRAND

Discussion

11704.	Question : Name the states involved in Ganga action plan.
Answer» SOLUTION :Uttarakhand, Uttar Pradesh, Bihar, WEST BENGAL and Jharkhand.

Discussion

11705.	Question : Name the stain used to visualize DNA fragments in gel electrophoresis.
Answer» SOLUTION :ETHIDIUM BROMIDE

Discussion

11706.	Question :Name the stage'of plasmodium that gains entry into the human body. (b) Trace the stages ofin the body of female its entry. (c) Explain the cause of periodic recurrence of chill and high fever during malarial ittack in humans.
Answer» Solution : (a) Plasmodium ENTERS the HUMAN body as sporozoites. (b) When a FEMALE Anopheles MOSQUITO bites an infected PERSON, the parasites enter the nosquito s body and undergo further development. The parasites multiply within them to form .porozoites that are stored in salivary glands until their transfer to human body. (c) The rupture of RBCs release a toxic substance called haemozoim, which is responsible for he chill and high fever

Discussion

11707.	Question : Name the stage of human embryo at which it gets implanted. Explain the process of implantation.
Answer» SOLUTION :The stage of the humans embryo in which it get implaned in the uterus in blastocyst The prossess of IMPLANTATION - Fertillzation is the formation of a diploid zygote and it moves through the utersu.Mitotic divions occur in the zygote with formation of 2,4,8,16 daughter cells called blastomers. Embryo with 8 to 16 blastomeres get arranged into gets attached to the endometrium while innere cell mass differenitate to form embryo .After attached to the endometium while innere cell mass differintiate to from embryo .After attachement , the UTERINE cells divide repidly and CAUSES the blastocyct to become embeldded in the endometrium of the uterus .This leads to pregnancy and the process is called implantion .

Discussion

11708.	Question : Name the specific areas in membranes of thylakoids where photosynthetic pigments are located.
Answer» SOLUTION :QUANTASOMES are the specific AREAS in MEMBRANES of thylakoids where PHOTOSYNTHETIC pigments are located.

Discussion

11709.	Question : Name the sperm lysins. Which organelle secretes it? What is its function?
Answer» Solution :Hyaluronidase, Corona penetrating enzyme and ACROSIN, They are secreted by acrosome of sperm, They ensure the PENETRATION of sperm into OVUM by DEGENERATING corona cells and digesting zona pellucida of ovum.

Discussion

11710.	Question : Name the space in which human heart is located.
Answer» Solution :MEDIASTINUM is the SPACE in which HUMAN heart is LOCATED.

Discussion

11711.	Question : Name the source organism that possesses Taq polymerase. What is so special about the function of this enzyme?
Answer» SOLUTION :The source of TAQ Polymerase-It isolated from thermophilic bacterium, Thermus aquaticus. Function of this Enzyme-Taq polymerase is a thermostable enzyme which remains ACTIVE during the high TEMPERATURE induced DENATURATION of DNA.

Discussion

11712.	Question : Name the sources of biofertilisers.
Answer» SOLUTION :AZOSPIRILLUM

Discussion

11713.	Question : Name the source of cyclosporin-A. How does this bioactive molecule function in our body?
Answer» SOLUTION :Source Organism-Trichoderma polysporum (fungus) Uses-It is a BIOACTIVE MOLECULE USED as an immuno-suppressive agent in organ transplant patients.

Discussion

11714.	Question : Ti plasmid used in genetic engineering is obtained from.
Answer» SOLUTION :AGROBACTERIUM tumifaciens.

Discussion

11715.	Question : Name the six breeds of buffalo in India.
Answer» SOLUTION :Jaffarabadi, MEHSANA, MURRAH, NAGPURI, NILI and Surati.

Discussion

11716.	Question : Name the six stages of buman evolution in correct sequence.
Answer» SOLUTION :Dryopithecus-15 MYA Ramapithecus-15 mya Australopithecines-3-4mya HOMO habilis-2 mya Homo erectus-1.5 mya 100,000-40,000 YEARS AGO Neanderthalman Homo sapiens-75,000-10,000 years ago

Discussion

11717.	Question : Name the simplest of nutrient cycles operating in an ecosystem.
Answer» SOLUTION :Phosphorus CYCLE is the SIMPLEST NUTRIENT cycle operating in an ecosystem.

Discussion

11718.	Question : Name the ship in which Darwin had a voyage around the world?
Answer» ANSWER :H.M.S.Beagle

Discussion

11719.	Question : Name the sex chromosomes in man.
Answer» ANSWER :X and Y

Discussion

11720.	Question : Name the sexually transmitted disease caused by Treponema pallidum.
Answer» Solution :SYPHILIS is the sexually transmitted DISEASE caused by TREPONEMA pallidium.

Discussion

11721.	Question : Name the seven contrasting traits of Mendel.
Answer» Solution :Plant HEIGHT , Seed Shape, Cotyledon colour , FLOWER colour , Pod colour, Pod FORM , Flower POSITION

Discussion

11722.	Question : Name the sense organ that lies on the schneiderian membrane:
Answer» ANSWER :OLFACTORY

Discussion

11723.	Question : Name the seed coats.
Answer» SOLUTION :(i) Each seed hasa think outer covering called seed COAT. (ii) The seed coat is DEVELOPED from INTEGUMENTS of the ovule. (iii) The outer coat is called TESTA and is hard whereas the inner coat is thin, membranous and is called tegmen.

Discussion

11724.	Question : Name the sense organ in the nasopalatine duct to smell food ?
Answer» ANSWER :JACOBSON's ORGAN

Discussion

11725.	Question : Name the secondary pollutant in photochemical smog. Mention the adverse effect.
Answer» Solution :Peroxyacetyl NITRATE (PAN) is a secondary POLLUTANT present in photochemical smog. It is THERMALLY UNSTABLE and decomposes into peroxyethanol radicals and nitrogen dioxide gas causing eye IRRITATION.

Discussion

11726.	Question : Name the scientists who were credited for showing the role of Penicillin as an antibiotic.
Answer» Solution : Its full potential as an effective antibiotic was established MUCH later by Ernest Chain and Howard Florey. This antibiotic was EXTENSIVELY used to treat American SOLDIERS WOUNDED in World War II. Fleming, Chain and Florey were awarded the Nobel Prize in 1945, for this discovery.

Discussion

11727.	Question : Name the scientists who were awarded Nobel Prize in 1945 for discovering the penicillin drug & its role as a antibiotic.
Answer» Solution :(a) ALEXANDER Fleming (B) EARNEST Chain ( c) Howard FLOREY

Discussion

11728.	Question : Name the scientists who were awarded Nobel Prize for discovery of Restriction enzymes
Answer» Solution :W. Arber, H. SMITH, D. Nathan in 1978

Discussion

11729.	Question : Name the scientists who supported modern synthetic theory
Answer» SOLUTION :SEWELL WRIGHT, Dobzhansky, HUXLEY and Simpson

Discussion

11730.	Question : Name the scientist(s) who rediscovered the Menelian work ? (i) Hugo de Vries (ii) Carl Correns (iii) Tschermak (iv) T.H. Morgan
Answer» a) i and iv b) i, ii and iv c) i,ii and III d) ii, iii and iv ANSWER :C

Discussion

11731.	Question : Name the scientists who generated first recombinant DNA molecules
Answer» Solution :PAUL Berg, Herbert Boyer, ANNIE CHANG, STANLEY Cohen

Discussion

11732.	Question : Name the scientists who experimentally proved the theory of chemical evolution.
Answer» SOLUTION :UREY and Miller were the scientists who experimentally PROVED the THEORY of chemical evolution.

Discussion

11733.	Question : Name the scientists who experimentally rejected the theory of abiogenesis.
Answer» SOLUTION :FRANCISCO REDI, SPALLANZANI, PASTEUR

Discussion

11734.	Question : Name the scientists who disproved the theory of spontaneous generation ?
Answer» SOLUTION :Francisco REDI, Lazzaro SPALLANZANI and Louise PASTEUR

Discussion

11735.	Question : Name the scientists who discovered AB blood group.
Answer» SOLUTION :Decastallo and Sturli.

Discussion

11736.	Question : Name the scientists who discovered Interferons?
Answer» SOLUTION :ALICK ISSAC and JEAN Lindemann

Discussion

11737.	Question : Name the scientists associated with the Malarial parasite .
Answer» SOLUTION :ROBERT KOCH

Discussion

11738.	Question : Name the scientists associated with the Germ theory of disease
Answer» SOLUTION :ROBERT KOCH

Discussion

11739.	Question : Name the scientist who reported haemophilia.
Answer» SOLUTION : An ARAB PHYSICIAN Albucasis (in 12TH CENTURY)

Discussion

11740.	Question : Name the scientist who had also come to similar conclusion as that of Darwin about natural selection as mechanism of evolution. Which place did he visit to come to conclusions ?
Answer» SOLUTION :ALFRED WALLACE, MALAY ARCHIPELAGO

Discussion

11741.	Question : Name the scientist, who has worked on pneumococcus bacteria ?
Answer» NEUTON MENDEL GRIFFITH WATSON SOLUTION :Griffith

Discussion

11742.	Question : Name the scientist who found out D.N.A and what was the name given by him?
Answer» Solution :Friedrick Meischer and he named it as .NUCLEIN.. Detailed ANSWER: Watson and Crick DISCOVERED DNA in 1950. Name GIVEN was double HELIX structure of DNA.

Discussion

11743.	Question : Name the scientist who disproved spontaneous generation theory.
Answer» SOLUTION :LOUIS PASTEUR

Discussion

11744.	Question : Name the scientist who discovered vaccination
Answer» SOLUTION :EDWARD JENNER

Discussion

11745.	Question : Name the scientist who discovered the fossil of Cro-Magnon man.
Answer» SOLUTION :MAC GREGAR (1868)

Discussion

11746.	Question : Name the scientist who discovered ozone layer
Answer» SOLUTION :CHARLES FABRY and HENRI BUISSON

Discussion

11747.	Question : Name the sac-like structure in the nucellus.
Answer» EMBRYO sac Endothelium Tapetum Chalaza Answer :A::B::C

Discussion

11748.	Question : Name the respective pattern of inheritance where F_1 phenotype: does not resemble either of the two parents and is in between the two resembles only one of the two parents.
Answer» SOLUTION :(a) INCOMPLETE DOMINANCE. (B) LAW of dominance.

Discussion

11749.	Question : Name the respective pathern of inheritance where F_1 phenotype a) Resembles any one of the two parents b) is an intermediate between two parental traits .
Answer» SOLUTION :a) DOMINANCE B) INCOMPLETE dominance

Discussion

11750.	Question : Name the resource agent of statins . How does this bioactive molecule functions in our boday ?
Answer» Solution :MONASCUS purpureus (Yeast). Statins acts effectively to REDUCE the blood CHOLESTROL LEVEL.

Discussion

Explore topic-wise InterviewSolutions in .

Question : Name the structure of embryo sac that guides the entry of pollen tube into it.

Question : Name the structural and functional unit of the liver.

Question : Name the strand of DNA which is not transcribed

Question : Name the states involved in Ganga action plan.

Question : Name the stain used to visualize DNA fragments in gel electrophoresis.

Question :Name the stage'of plasmodium that gains entry into the human body. (b) Trace the stages ofin the body of female its entry. (c) Explain the cause of periodic recurrence of chill and high fever during malarial ittack in humans.

Question : Name the stage of human embryo at which it gets implanted. Explain the process of implantation.

Question : Name the specific areas in membranes of thylakoids where photosynthetic pigments are located.

Question : Name the sperm lysins. Which organelle secretes it? What is its function?

Question : Name the space in which human heart is located.

Question : Name the source organism that possesses Taq polymerase. What is so special about the function of this enzyme?

Question : Name the sources of biofertilisers.

Question : Name the source of cyclosporin-A. How does this bioactive molecule function in our body?

Question : Ti plasmid used in genetic engineering is obtained from.

Question : Name the six breeds of buffalo in India.

Question : Name the six stages of buman evolution in correct sequence.

Question : Name the simplest of nutrient cycles operating in an ecosystem.

Question : Name the ship in which Darwin had a voyage around the world?

Question : Name the sex chromosomes in man.

Question : Name the sexually transmitted disease caused by Treponema pallidum.

Question : Name the seven contrasting traits of Mendel.

Question : Name the sense organ that lies on the schneiderian membrane:

Question : Name the seed coats.

Question : Name the sense organ in the nasopalatine duct to smell food ?

Question : Name the secondary pollutant in photochemical smog. Mention the adverse effect.

Question : Name the scientists who were credited for showing the role of Penicillin as an antibiotic.

Question : Name the scientists who were awarded Nobel Prize in 1945 for discovering the penicillin drug & its role as a antibiotic.

Question : Name the scientists who were awarded Nobel Prize for discovery of Restriction enzymes

Question : Name the scientists who supported modern synthetic theory

Question : Name the scientist(s) who rediscovered the Menelian work ? (i) Hugo de Vries (ii) Carl Correns (iii) Tschermak (iv) T.H. Morgan

Question : Name the scientists who generated first recombinant DNA molecules

Question : Name the scientists who experimentally proved the theory of chemical evolution.

Question : Name the scientists who experimentally rejected the theory of abiogenesis.

Question : Name the scientists who disproved the theory of spontaneous generation ?

Question : Name the scientists who discovered AB blood group.

Question : Name the scientists who discovered Interferons?

Question : Name the scientists associated with the Malarial parasite .

Question : Name the scientists associated with the Germ theory of disease

Question : Name the scientist who reported haemophilia.

Question : Name the scientist who had also come to similar conclusion as that of Darwin about natural selection as mechanism of evolution. Which place did he visit to come to conclusions ?

Question : Name the scientist, who has worked on pneumococcus bacteria ?

Question : Name the scientist who found out D.N.A and what was the name given by him?

Question : Name the scientist who disproved spontaneous generation theory.

Question : Name the scientist who discovered vaccination

Question : Name the scientist who discovered the fossil of Cro-Magnon man.

Question : Name the scientist who discovered ozone layer

Question : Name the sac-like structure in the nucellus.

Question : Name the respective pattern of inheritance where F_1 phenotype: does not resemble either of the two parents and is in between the two resembles only one of the two parents.

Question : Name the respective pathern of inheritance where F_1 phenotype a) Resembles any one of the two parents b) is an intermediate between two parental traits .

Question : Name the resource agent of statins . How does this bioactive molecule functions in our boday ?