24277 + Interview Questions in Biology in Class 12 Page 437 InterviewSolution

21801.	Question : Anu posed a question in the class.Why doesn't life originate in the sea water as it happened in the beginning? What answer would you give him?
Answer» Solution :Today the EARTH.s condition is not favourable for such an abiotic ORIGIN of new life.The presence of free `O_2` on earth prevents any abiotic origin as the GAS would OXIDISE many products that would be formed during the step-wise process LEADING to such an origin.

Discussion

21802.	Question : Antrum is a cavity of :
Answer» Ovary Graafian follicle Blastula Gastrula Answer :B

Discussion

21803.	Question : Antrum is :–
Answer» Fluid FILLED follicle cavity An INNER THECA interna The mature follicle Fluid LESS follicle cavity Answer :A

Discussion

21804.	Question : Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain
Answer» HARVESTED ANTIBODIES GAMMA globulin ATTENUATED PATHOGENS activated pathogens Solution :attenuated pathogens

Discussion

21805.	Question : Antitetanus serum (ATS) provides
Answer» NATURALLY ACQUIRED PASSIVE immunity Artificially acquired ACTIVE immunity Artificially acquired passive immunity Naturally acquired active immunity Answer :C

Discussion

21806.	Question : Antisense technology is use of
Answer» Complementary RNA for STOPPING expression of a gene RNA polymerase for synthesis of DNA Cell displaying foreign synthesis of DNA Tissue CULTURE for obtaining somaclonal variations Answer :A

Discussion

21807.	Question : Antiserum is rich in
Answer» Antibiotics Antigens Antibodie Phagocytes Answer :C

Discussion

21808.	Question : Antipodals are located at ...........of embryo sac.
Answer» ANSWER :CHALAZAL END

Discussion

21809.	Question : Antigen is .
Answer» SUBSTANCES which STIMULATES the production of venom Vaccine Antibody production STIMULATING agent Part of the body DEFENCE system Answer :C

Discussion

21810.	Question : Antigen - antibody reaction is a specific reaction. Justify your answer.
Answer» Solution :The antibodies are specific to antigens i.e., a particular antibody binds only with a particular antigen. This is ALSO KNOWN as lock and key mechanism scen as in the enzyme reaction. The antigen binding site in the antibody is MADE such that the same type of antigen can attach to it. The antigen - antibody reaction makes the antigen INACTIVE.

Discussion

21811.	Question : Antigen and Antibody.
Answer» SOLUTION :

Discussion

21812.	Question : Anticodon occur in :
Answer» t-RNA m-RNA r-RNA DNA Answer :A

Discussion

21813.	Question : Anticodon is base triplet on
Answer» MRNA COMPLEMENTARY to BASE SEQUENCE on rRNA mRNA complementary to base sequence on tRNA tRNA complementary to base sequence on RNA tRNA complementary to base sequence on mRNA Answer :D

Discussion

21814.	Question : Anticodon is an unpaired triplet of bases in an exposed position of
Answer» MRNA rRNA tRNA sRNA Solution :tRNA possess anticodon stem which includes five PAIRED BASES . The anticodon LOOP CONSISTS of 7 unpaired bases . The third , fourth and fifth of which form anticodon. This anticodon permitstemporary complementary pairing with three bases on mRNA.

Discussion

21815.	Question : Anticoagulant hirudin is found in(A) snake(B) Lizard(C) Leech(D) Scorpion
Answer» Snake Lizard LEECH Scorpion Solution :Leech

Discussion

21816.	Question : Anticoagulant hirudin is found in
Answer» Snake Lizard Leech Scorpion Answer :C

Discussion

21817.	Question : _____antibody is present in theplasma of a man with antigen-B.
Answer» ANSWER :b-antibody

Discussion

21818.	Question : Antibody is represented as ……………..
Answer» `H_4 L_4` `H_2 L_2` `H_2 L_2` `H_3 L_2` SOLUTION :`H_2 L_2`

Discussion

21819.	Question : _____antibody is present in the plasma of a man with antigen-A.
Answer» ANSWER :a-antibody

Discussion

21820.	Question : Antibodies that function in innate immunity
Answer» MASS replication Clonal selection Mass selection Pure LINE selection Answer :B

Discussion

21821.	Question : Antibodies produced in a bоdу iѕ a mаdе uр оf
Answer» Steroid Prostaglandins GLYCOPROTEIN Lipoprotein SOLUTION :Glycoprotein

Discussion

21822.	Question : Antibodies present in colostrum which protect the new born from certain diseases is of
Answer» IGG type IgA type IgD type IgE type Solution :ANTIBODIES present in colostrum which protect the new born from certain diseases is of IgA type. IgG acts as opsonin. IgD is to signal B cells to be ACTIVATED. IgE triggers inflammatory response, also mediates in allergic reactions.

Discussion

21823.	Question :Antibodies produced by B-cells are
Answer» BETA globulins Alpha globulins Serum albumins Gamma globulins Answer :D

Discussion

21824.	Question : Antibodiesare found in_____.
Answer» plasma RBC WBC Thrombocyte Answer :A

Discussion

21825.	Question : Antibodies are formed by
Answer» PLASMA cells Histiocytes Mast cells None of above Answer :A

Discussion

21826.	Question : The antibiotic Streptomycin is obtained from
Answer» S. griseus S. aureofacienns S. noursil saccharomyces cerevisiae Answer :A

Discussion

21827.	Question : Antibodies are
Answer» Albumins Gammaglobulin Sucrose. Vitamins Answer :B

Discussion

21828.	Question : Antibodies are_____.
Answer» Lipids Carbohydrates Vitamins Glycoprotein Answer :D

Discussion

21829.	Question : Antibiotics cure disease by
Answer» COMPETITIVE Inhibition FIGHTING with the DISEASE CAUSING ORGANISM Turning the pathogen out of the body Removing the pain Answer :A

Discussion

21830.	Question : Antibiotics inhibit the growth or destroy(A) Bacteria and fungi(B) Viruses(C) Bacteria and viruses(D) All of the above
Answer» BACTERIA and FUNGI Viruses Bacteria and viruses All of the above Solution :Bacteria and fungi

Discussion

21831.	Question : "Antibiotics are chemical substance produced from microbes". a. What is the meaning of the term antibiotics? b. Name the first antibiotic. c. Who discovered antibiotics?
Answer» SOLUTION :a. Anti-against, bio-life (Against the life of PATHOGENS) B. Penicillin c. ALEXANDER Fleming .

Discussion

21832.	Question : Antibiotics are
Answer» MEDICINES TOXINS Plants Syrups ANSWER :A

Discussion

21833.	Question : Antibiotic penicilin is produced from a:
Answer» Bacteria Fungus LICHEN Algae SOLUTION :CHEESE

Discussion

21834.	Question : Antiauxin used in picking cotton balls is:
Answer» 2,4-D TIBA NAA Both (A) and (B) ANSWER :B

Discussion

21835.	Question : Anti-coagulent nature of endospore is due to the presence of
Answer» Teichoic acid Ca-dipicolinic acid Diaminopimelic acid Calcium pectate Answer :B

Discussion

21836.	Question : Anti-venom against snake poison contains
Answer» ANTIGENS Antigen-antibody complexes Antibodies Enzymes Solution :Anti-venom against snake poison contains antibodies. Antigens are diseases causing AGENTS. Antigen-antibody complexes are formed to PROVIDE IMMUNITY. Enzymes catalyses the biochemical REACTIONS.

Discussion

21837.	Question : anti-b -
Answer» SOLUTION :ANTIBODY'B'

Discussion

21838.	Question : Anthropogenic Source of Air Pollution : Fuel consumption :: Natural Source of Air Pollution :
Answer» Fossil fuel Industrial source Power station Spread during volcanic ERUPTION Answer :D

Discussion

21839.	Question : anti -a-
Answer» SOLUTION :ANTIBODY'a'

Discussion

21840.	Question : anthropogenic ecosystem is characterized by all of the followings, except
Answer» LITTLE cycling of NUTRIENTS have little diversity LOW PRODUCTIVITY simple food chain Answer :C

Discussion

21841.	Question : Anthropogenic extinction is causing the ' sixth extinction ' . It is ______________ times more faster than the extinction which occurred in pre - human times .
Answer» 44471 50 - 60 100 - 1000 80-100 Answer :C

Discussion

21842.	Question : Anthophore is an internode between
Answer» Two opposite LEAVES in spiral phylloaxy Calyx and corolla Corolla and androecium Androecium and gynaecium Answer :B

Discussion

21843.	Question : Anthophore is an internodal axis occurring
Answer» SEPALS and PETALS perianthe and STAMENS petals and stamesn stamens and CARPELS ANSWER :A

Discussion

21844.	Question : Anthocyanin pigment synthesis in leaves is encouraged by deficiency of :
Answer» `N_(2)` C Mg Cl Answer :A

Discussion

21845.	Question : Anthesis is a phenomenon which refers to :
Answer» RECEPTION of POLLEN by stigma Formation of pollen Development of anther Opening of FLOWER bud Answer :D

Discussion

21846.	Question : Anther of angiosperm generally composed of
Answer» ONE sporangium Two sporangia Three sporangia Four sporangia Answer :D

Discussion

21847.	Question : Anther generally consists of……(A) one microsporangia(B) two microsporangia(C) Three microsporangia(D) Four microsporangia
Answer» ONE microsporangia two microsporangia Three microsporangia Four microsporangia Answer :D

Discussion

21848.	Question : Identify each part in a flowering plant and write whether it is haploid (n) or diploid (2n).(a) Ovary ……….. (b) Anther …………. (c ) Egg ……….. (d) Pollen …………. (e ) Male gamete ………….. (f) Zygote …………..
Answer» SOLUTION :

Discussion

21849.	Question : Anterior irregular wavy part of retina is
Answer» Ora serrata PARS OPTICS OCULAR CONJUCTIVA Fovea centralis. ANSWER :A

Discussion

21850.	Question : Anterior choroid plexus is a network of
Answer» NERVE fibres Blood capillaries Axons LYMPH capillaries Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : Anu posed a question in the class.Why doesn't life originate in the sea water as it happened in the beginning? What answer would you give him?

Question : Antrum is a cavity of :

Question : Antrum is :–

Question : Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain

Question : Antitetanus serum (ATS) provides

Question : Antisense technology is use of

Question : Antiserum is rich in

Question : Antipodals are located at ...........of embryo sac.

Question : Antigen is .

Question : Antigen - antibody reaction is a specific reaction. Justify your answer.

Question : Antigen and Antibody.

Question : Anticodon occur in :

Question : Anticodon is base triplet on

Question : Anticodon is an unpaired triplet of bases in an exposed position of

Question : Anticoagulant hirudin is found in(A) snake(B) Lizard(C) Leech(D) Scorpion

Question : Anticoagulant hirudin is found in

Question : _____antibody is present in theplasma of a man with antigen-B.

Question : Antibody is represented as ……………..

Question : _____antibody is present in the plasma of a man with antigen-A.

Question : Antibodies that function in innate immunity

Question : Antibodies produced in a bоdу iѕ a mаdе uр оf

Question : Antibodies present in colostrum which protect the new born from certain diseases is of

Question :Antibodies produced by B-cells are

Question : Antibodiesare found in_____.

Question : Antibodies are formed by

Question : The antibiotic Streptomycin is obtained from

Question : Antibodies are

Question : Antibodies are_____.

Question : Antibiotics cure disease by

Question : Antibiotics inhibit the growth or destroy(A) Bacteria and fungi(B) Viruses(C) Bacteria and viruses(D) All of the above

Question : "Antibiotics are chemical substance produced from microbes". a. What is the meaning of the term antibiotics? b. Name the first antibiotic. c. Who discovered antibiotics?

Question : Antibiotics are

Question : Antibiotic penicilin is produced from a:

Question : Antiauxin used in picking cotton balls is:

Question : Anti-coagulent nature of endospore is due to the presence of

Question : Anti-venom against snake poison contains

Question : anti-b -

Question : Anthropogenic Source of Air Pollution : Fuel consumption :: Natural Source of Air Pollution :

Question : anti -a-

Question : anthropogenic ecosystem is characterized by all of the followings, except

Question : Anthropogenic extinction is causing the ' sixth extinction ' . It is ______________ times more faster than the extinction which occurred in pre - human times .

Question : Anthophore is an internode between

Question : Anthophore is an internodal axis occurring

Question : Anthocyanin pigment synthesis in leaves is encouraged by deficiency of :

Question : Anthesis is a phenomenon which refers to :

Question : Anther of angiosperm generally composed of

Question : Anther generally consists of……(A) one microsporangia(B) two microsporangia(C) Three microsporangia(D) Four microsporangia

Question : Identify each part in a flowering plant and write whether it is haploid (n) or diploid (2n).(a) Ovary ……….. (b) Anther …………. (c ) Egg ……….. (d) Pollen …………. (e ) Male gamete ………….. (f) Zygote …………..

Question : Anterior irregular wavy part of retina is

Question : Anterior choroid plexus is a network of