24277 + Interview Questions in Biology in Class 12 Page 16 InterviewSolution

751.	Question :Where do the lymphocytes produced by the lymphoid organ mentioned above migrate and how do they affect immunity?
Answer» Solution :Lymphocytes PRODUCED in bone marrow migrate to second lymphoid ORGANS (spleen, LYMPH nodes). They differentiate into T and B lymphocytes and provide IMMUNITY against infection.

Discussion

752.	Question : Where do the following events in the life cycle of Plasmodium takes place ?
Answer» Ferilization-…… DEVELOPMENT of gametocytes-……… Release of sporozoites-…….. Schizogony-…….. SOLUTION :(a) Ferilization-Gut of mosquito (b)Development of gametocytes-HUMAN RBC.s (C )Release of sporozoites-From Mosquito to the human BLOOD (d)Schizogony-Human liver cells

Discussion

753.	Question : Where do pollen grains germinate ?
Answer» ANTHER Style STIGMA Pollen tube ANSWER :C

Discussion

754.	Question : Where do sperms get matured?
Answer» In SEMINAL vesicle Seminiferous tubules In EPIDIDYMIS VASA efferentia Answer :A

Discussion

755.	Question : Where do endomycorrhizae grow?
Answer» SOLUTION :ENDOMYCORRHIZAE GROW in between and within the CORTICAL cells of the root.

Discussion

756.	Question : Where do certain symbiotic micro-organism normally occur in human body ?
Answer» Caecum ORAL lining and TONGUE SURFACE Vermiform appendix and caecum Duodenum Answer :A

Discussion

757.	Question : Where do bacteria grow in biogas plant?(A) in excreta(B) decaying material(C) excreta or decaying material(D) cellulosic material
Answer» in EXCRETA DECAYING MATERIAL excreta or decaying material cellulosic material Solution :excreta or decaying material

Discussion

758.	Question : Where did Montreal Protocol was held? State its objectives.
Answer» Solution :The International treaty CALLED the MONTREAL PROTOCOL (1987) was held in Canada on substance that deplete ozone LAYER and the MAIN goal of it is gradually eliminating the production and consumption of ozone depleting substances and to limit their damage on the Earth.s ozone layer

Discussion

759.	Question : Where did life appear fist ?
Answer» ANSWER :SEA WATER

Discussion

760.	Question : Where cyclosporine A is used ?(A) To remove oily stains in laundry.(B) As an immunosuppressive agent(C) To decrease blood cholesterol(D) To prevent blood clotting in blood vessels.
Answer» To remove OILY stains in laundry. As an immunosuppressive agent To decrease blood cholesterol To PREVENT blood CLOTTING in blood vessels. Solution :As an immunosuppressive agent

Discussion

761.	Question : Where callus is maintained ?
Answer» In NUTRIENT SOLUTION On agar-agar JEL On polyacrelamide jel On AGAROSE jel Solution :On agar-agar jel

Discussion

762.	Question : Where bee wax is not used ?
Answer» In MANUFACTURING of cosmetics In manufacturing of MEDICINES In manufacturing of colours/paints In manufacturing of CARBON paper Solution :In manufacturing of medicines

Discussion

763.	Question : Where are the specialised cells called podocytes found in a anephron?
Answer» SOLUTION :BOWMAN's CAPSULE

Discussion

764.	Question : Whereare the followinglocated ?(a) Yak Research Centre(b) ProjectHangul(c ) Periyar Sanctuary (d) Kaziranga National Park (e) Gir National Park.
Answer» Solution :(a) Arunachal PRADESH(B) Dachigam SANCTUARY ( Jammu and KASHMIR )( c ) Kerala (d) ASSAM (e) Gujarat.

Discussion

765.	Question : Where are the feeding and satiety centres located?
Answer» ANSWER :HYPOTHALAMUS

Discussion

766.	Question : Where are thearchegonia in angiosperms ?
Answer» Solution :Angiosperm are characterizedin having highly reduced female gametophyte ( embryo SAC ) in which the ARCHEGONIA are either higlyh reduced, disoranized or disappeard. There are MANY viewsregarding the archegonia in anigosperm.According to Schurhoff (1919,1928), the 4 nuclei at the mciropylar end of embryo sac REPRESENT two archegonia.One synergid and the egg from one ARCHEGONIUM and the other synergid and upper plar nucleus constitue the second archegonium. According to anotherviw of Porsch , 4 nuclei of micropylar end constitue one archegonium( tow synergids are quivalent to neck cells and the polar nucleus is euquivalent to ventaral canal cell ) and 4 nucleis of chalazal end constitue the second archegonium. However , many workers believe that archegonia have completely disappeard in angiosperm .

Discussion

767.	Question : Where are the Ebner's glands are located?
Answer» ANSWER :TONGUE

Discussion

768.	Question : Where are red and white pulps are located ?
Answer» ANSWER :SPLEEN

Discussion

769.	Question : Where are podocytes located?
Answer» Solution :Podocytes are located in the squamous EPITHELIUM of VISCERAL layer of Bowman's CAPSULE.

Discussion

770.	Question : Where are parathyroid glands located?
Answer» Above the thymus In FRONT of the THYROID gland Above the pancreas On the BACK of thyroid gland Answer :D

Discussion

771.	Question : Where are IgA, IgM and IgE antibodies found ?
Answer» SKIN BLOOD LYMPH GLANDS SOLUTION :blood

Discussion

772.	Question : Where are lateral ventricles situated and what is its roof called?
Answer» Solution :Lateral VENTRICLES are the cavities filled with CEREBROSPINAL FLUID, present inside the cerebrum and its ROOF is called PALLIUM.

Discussion

773.	Question : Where are Leydig cells located? What do they secrete?
Answer» Solution :In the connective TISSUE between seminiferous tubules, SECRETE HORMONE- TESTOSTERONE

Discussion

774.	Question : Where are Hot Spots of biodiversity in India ?
Answer» Western GHATS, Eastern ghats, INDO Burma Indo Burma, Eastern ghats and SRI LANKA Himalayas Western ghats & Sri Lanka, Indo Burma and Himalaya Eastern ghats & Sri Lanka, Indo Burma Answer :C

Discussion

775.	Question : Where are fimbriae present in a human female reproductive system? Give their function.
Answer» SOLUTION :At MARGIN of infundibulum of fallopian TUBE. These bear cilia that beat towards ostium to direct the released EGG into the infundibulum.

Discussion

776.	Question : Where are electron carriers of ETS and enzymes required for ATP synthesis located?
Answer» Solution :Electron CARRIERS of ETS and enzymes REQUIRED for ATP synthesis are LOCATED in the body of oxysomes.

Discussion

777.	Question : Where are B-cells and T-cells formed? How do they differ from each other?
Answer» SOLUTION :B-cells and T-cells are formed in bone marrow. B-cells produce ANTIBODIES but t=T-cells do not produce antibodies but HELP B-cells produce them.

Discussion

778.	Question : Where are B-cells and T-cells formed ? How do they differ from each other ?
Answer» Solution :Both B-cells and T-cells are formed in bone marrow. B-cells MATURES in bone marrow while T-cells matures in THYMUS. B-cells provides humoral immunity and T-cells provides cell mediated immunity (CMI).

Discussion

779.	Question :Where and when does replication occur?
Answer» Solution :Replication occurs in the nucleus during the Sphase of the cell CYCLE in eukaryotes, in the CYTOPLASM and ALMOST continuously in prokaryotes. The BASE sequence in one of the strands of DNA is TAGCATGAT Give the base sequence of its complementary strand.

Discussion

780.	Question : Where and how does it take place?
Answer» Solution :Triple FUSION takes place in the central cell of embryo SAC in the OVULE.

Discussion

781.	Question : Where among the followingwill you find pitcher plants ?
Answer» RAIN forestof Norht - East INDIA Sunderbans THAR Desert WESTERN GHATS Answer :B

Discussion

782.	Question : Where among the following will you find pitcher plant ?
Answer» Rain FOREST of NORTH-East India Sunderbans Thar DESERT WESTERN Ghats Solution :Rain forest of North-East India Pitcher plants are FOUND at rain forest of North- East India.

Discussion

783.	Question :When you look around, you see both living and non-living things. You must have wondered and asked yourself – ‘what is it that makes an organism living, or what is it that an inanimate thing does not have which a living thing has’ ? The answer to this is the presence of -
Answer» Cell Nucleus Mitochondria Chloroplast Answer :C

Discussion

784.	Question : When you hold your breath, which of the following gas changes in blood would firstlead to the urge to breathe?
Answer» FALLING `CO_2` concentration Rising `CO_2` and falling `O_2` concentration Falling `O_2` concentration Rising `CO_2` concentration Answer :D

Discussion

785.	Question : When you hold your breath, which of the following first leads to the urge to breathe?
Answer» FALLING CARBON dioxide RISING OXYGEN Rising carbon dioxide Falling oxygen Answer :C

Discussion

786.	Question : When yellow round heterozygous pea plants are self fertilised, the frequency of occurrence of RrYY genotype among the offspring is
Answer» `9//16` `3//16` `2//16` `1//16` ANSWER :C

Discussion

787.	Question : When we talk of functional macromolecules (e.g. proteins as enzymes, hormones, receptors, antibodies etc), towards what are they evolving?
Answer» SOLUTION :SIMILARITIES in proteins and genes performing a given function among diverse organisms give CLUES to common ancestry. These biochemical similarities point to the same shared ancestry as structural similarities among diverse organisms. Trypsin (ancient enzyme) is present from protozoa to mammals.

Discussion

788.	Question : When we say "survival of the fittest", does it mean that (a) those which are fit only survive, or (b) those that survive are called fit ? Comment.
Answer» SOLUTION :Those individuals which survive and REPRODUCE intheir RESPECTIVE environment are CALLED FIT.

Discussion

789.	Question : When we rotate our neck :-
Answer» Occipetal condyles ROTATE on ATLAS Axis`(C_(2))` bone rotates on Atlas Axis and atlas both bones other Atlas ROTATED on axis Answer :D

Discussion

790.	Question : When we move from species to kingdom in taxonomic hierarchy. The common characters from one taxon to another taxon :
Answer» Can increase Can DECREASE Always decrease Can decrease or increase Answer :C

Discussion

791.	Question : "When we look at stars we apparently are peeping into the past." Why it is said so? Because:
Answer» STARS are very large in size Stars are very small in size Light COMING from a star TAKES a long time to REACH our eyes There is no life on stars just as in past of earth Answer :C

Discussion

792.	Question : When we ligate a foreign DNA at the sa/l site of pBR322, the …....a…....plasmid will lose tetracycline resistance due to the insertion of foreign DNA but can still be selected out from …..b….. ones by plating the …...c…..... on ampicillin containing medium.
Answer» A = NON - RECOMBINANT , B = Recombinant, C = Transgormant A =Recombinant , B = Non - recombinant, C = Transgormant A =Transgormant, B = Non - recombinant, C =Recombinant , A =Recombinant , B =TransgormantC = Non - recombinant, ANSWER :B

Discussion

793.	Question : "When we conserve and protect the whole ecosystem, its biodiversity at all levels is protected" This approach includes all of the following, except
Answer» SEED bank National parks Sanctuaries Answer :B

Discussion

794.	Question : When water is added to a living cell, the following is not observed.
Answer» INCREASE in free ENERGY for WATER Decrease in the AMOUNT of solute Increase in pressure potential Increase in water potential Answer :B

Discussion

795.	Question : When was the analysis of the working draft of the genome published ?
Answer» 36557 36923 37288 37653 Solution :36923

Discussion

796.	Question : When was the Ganga Action Plan started?
Answer» SOLUTION :In 1985 13.

Discussion

797.	Question : When was National AIDS Control Programme was started in India?
Answer» SOLUTION :In 1987.

Discussion

798.	Question : When virus is used as vectors which word is used ?
Answer» transformation synthesis TRANSDUCTION Analysis Solution :transduction

Discussion

799.	Question : When was MTP legalised in India ?
Answer» ANSWER :1971

Discussion

800.	Question : When two unrelated individuals or lines are crossed, the performance of F_(1) hybrid is often superior to both its parents. This phenomenon is called
Answer» HETEROSIS TRANSFORMATION Splicing Metamorphosis ANSWER :A

Discussion

Explore topic-wise InterviewSolutions in .

Question :Where do the lymphocytes produced by the lymphoid organ mentioned above migrate and how do they affect immunity?

Question : Where do the following events in the life cycle of Plasmodium takes place ?

Question : Where do pollen grains germinate ?

Question : Where do sperms get matured?

Question : Where do endomycorrhizae grow?

Question : Where do certain symbiotic micro-organism normally occur in human body ?

Question : Where do bacteria grow in biogas plant?(A) in excreta(B) decaying material(C) excreta or decaying material(D) cellulosic material

Question : Where did Montreal Protocol was held? State its objectives.

Question : Where did life appear fist ?

Question : Where cyclosporine A is used ?(A) To remove oily stains in laundry.(B) As an immunosuppressive agent(C) To decrease blood cholesterol(D) To prevent blood clotting in blood vessels.

Question : Where callus is maintained ?

Question : Where bee wax is not used ?

Question : Where are the specialised cells called podocytes found in a anephron?

Question : Whereare the followinglocated ?(a) Yak Research Centre(b) ProjectHangul(c ) Periyar Sanctuary (d) Kaziranga National Park (e) Gir National Park.

Question : Where are the feeding and satiety centres located?

Question : Where are thearchegonia in angiosperms ?

Question : Where are the Ebner's glands are located?

Question : Where are red and white pulps are located ?

Question : Where are podocytes located?

Question : Where are parathyroid glands located?

Question : Where are IgA, IgM and IgE antibodies found ?

Question : Where are lateral ventricles situated and what is its roof called?

Question : Where are Leydig cells located? What do they secrete?

Question : Where are Hot Spots of biodiversity in India ?

Question : Where are fimbriae present in a human female reproductive system? Give their function.

Question : Where are electron carriers of ETS and enzymes required for ATP synthesis located?

Question : Where are B-cells and T-cells formed? How do they differ from each other?

Question : Where are B-cells and T-cells formed ? How do they differ from each other ?

Question :Where and when does replication occur?

Question : Where and how does it take place?

Question : Where among the followingwill you find pitcher plants ?

Question : Where among the following will you find pitcher plant ?

Question :When you look around, you see both living and non-living things. You must have wondered and asked yourself – ‘what is it that makes an organism living, or what is it that an inanimate thing does not have which a living thing has’ ? The answer to this is the presence of -

Question : When you hold your breath, which of the following gas changes in blood would firstlead to the urge to breathe?

Question : When you hold your breath, which of the following first leads to the urge to breathe?

Question : When yellow round heterozygous pea plants are self fertilised, the frequency of occurrence of RrYY genotype among the offspring is

Question : When we talk of functional macromolecules (e.g. proteins as enzymes, hormones, receptors, antibodies etc), towards what are they evolving?

Question : When we say "survival of the fittest", does it mean that (a) those which are fit only survive, or (b) those that survive are called fit ? Comment.

Question : When we rotate our neck :-

Question : When we move from species to kingdom in taxonomic hierarchy. The common characters from one taxon to another taxon :

Question : "When we look at stars we apparently are peeping into the past." Why it is said so? Because:

Question : When we ligate a foreign DNA at the sa/l site of pBR322, the …....a…....plasmid will lose tetracycline resistance due to the insertion of foreign DNA but can still be selected out from …..b….. ones by plating the …...c…..... on ampicillin containing medium.

Question : "When we conserve and protect the whole ecosystem, its biodiversity at all levels is protected" This approach includes all of the following, except

Question : When water is added to a living cell, the following is not observed.

Question : When was the analysis of the working draft of the genome published ?

Question : When was the Ganga Action Plan started?

Question : When was National AIDS Control Programme was started in India?

Question : When virus is used as vectors which word is used ?

Question : When was MTP legalised in India ?

Question : When two unrelated individuals or lines are crossed, the performance of F_(1) hybrid is often superior to both its parents. This phenomenon is called