24277 + Interview Questions in Biology in Class 12 Page 101 InterviewSolution

5001.	Question : The proces of transformation is not affected by which of the following enzymes? A. Dnase,B. Rnase c. Peptidase , D. Lipase
Answer» A,B A, B, C, D B, C, D A, B, C Solution :(c) :Transformation is a phenomenon by which DNA ISOLATED from one type of cell when introduced inot nother type is ABLE to give some of its properties ot the LATTER. In 1944, Avery, MCCARTY and MacLeod dicovered that protein-digesting enzymes (proteases)and RNA -digesting enzymes (RNASES) did not affect transformation, so the transforming substance was not a portein or RNA. Digestion with DNase did inhibit transformation. They concluded that DNA is the hereditary material.

Discussion

5002.	Question : The procedure of GIFT involves the transfer of female gamete to the fallopian tube. Can gametes be transferred to the uterus to achieve the same result ? Explain.
Answer» SOLUTION :In GIFT method, female ovum is transferred to FALLOPIAN tube reproductive cells cannot be transferred to uterus. Because the atmosphere of uterus is not favorable therefore cannot protect reproductive cells. If they are directly transferred into uterus then they are destroyed or GET destroyed by phagocytes and live zygote cannot be PRODUCED.

Discussion

5003.	Question : The procedure of GIFT involves the transfer of female gametes into the fallopian tube, can gametes be transferred to the uterus to achieve the same result? Explain.
Answer» Solution : TRANSFER of an ovum collected from a DONOR into the fallopian tube. In this the eggs are collected from the ovaries and placed with the sperms in one of the fallopian TUBES. The ZYGOTE travels toward the UTERUS and gets implanted in the inner lining of the uterus.

Discussion

5004.	Question : The probability of the male child of a haemophiliac father and normal mother becoming haemophiliac.
Answer» 0 0.25 0.5 1 Solution :0.5

Discussion

5005.	Question : The probable ancestors of modern day frogs and salamanders are
Answer» Pelycosaurs Dipnoi fishes Cartilaginous fishes Coelacanth fishes Answer :D

Discussion

5006.	Question : The probability of fruit set in a self - pollinated bisexual flower of a plant is far greater than a dioecious plant. Explain.
Answer» Solution :There is assured fruit set in self POLLINATED bisexual flower even in the absence of POLLINATORS. As both male and female GAMETES are in a same flower in dioecious plants, there is male and female flowers present on different plants, so external POLLINATING agent is REQUIRED for pollination.

Discussion

5007.	Question : Theprinciple patendingpiratesare
Answer» US Japan GERMAN All of these ANSWER :D

Discussion

5008.	Question : The principle of competitive exclusion was
Answer» C Darwin GF Gause MacArthur Verhulst and PEARL ANSWER :B

Discussion

5009.	Question : The principle of Vaccination and Immunization is based on which property ?
Answer» Solution :The principle of Vaccination and Immunization is based on the property of .memory. of the immune system. In Vaccination, a preparation of antigenic proteins of pathogens or inactivated/weakened pathogen (vaccine) is introduced in the body. The antibodies produced in the body against these antigens would neutralize the pathogenic agents during actual infection. The Vaccine also generate memory B and T cells that recognize the pathogen quickly on subsequent exposure and overwhelm the invaders with massive PRODUCTION of antibodies. If a person is infected with some deadly microbes to which QUICK immune response is required as in TETANUS, we NEED to inject the performed antibodies or antitoxins (a preparation containing antibodies and toxin). In case of SNAKE bite the injection which is given to the patients, contain preformed antibodies against the snake venom. This time of immunization is called passive Immunisation.

Discussion

5010.	Question : The principal tail piece of human sperm shows the microtubular arrangement of (a) 7+2(b) 9+2(c) 11+2 (d) 13+2
Answer» `7+2` `9+2` `11+2` `13+2` Solution :The AXIAL filament in thetail of human sperm has `9+2` microtubular ARRANGEMENT LIKE that of FLAGELLA and cilia.

Discussion

5011.	Question : The principal nitrogenous excretory compound in humans is synthesised in
Answer» kidneys as WELL as ELIMINATED by kidneys liver and ALSO wliminated by the same THORUGH bile the liver, but eliminated mostly through kidneys the liver, but eliminated Answer :D

Discussion

5012.	Question : The principal genetic material of living being is……………..
Answer» RNA DNA Both (A) and (B) NONE of above Solution :DNA

Discussion

5013.	Question : The principal coloring agent present in the leaf paste of Lawsonia inermis which give orange to dark red when applied on skin is __________ .
Answer» ANSWER :Lacosone

Discussion

5014.	Question : The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
Answer» (a) THERMOACIDOPHILES (B) METHANOGENS (C) EUBACTERIA (d) Halophiles Answer :B

Discussion

5015.	Question : The primitive earth earth conditions were experimentally shown by
Answer» UREY and Miller Miller OPARIN Both (a) and (B) ANSWER :D

Discussion

5016.	Question : the primitive earth contains
Answer» OXYGEN, METHANE, CARBONDIOXIDE and ammonia Water vapou, methane, oxygen and ammonia methane, carbondioxide an ammonia Water VAPOUR, methane, carbondioxide and ammonia Answer :D

Discussion

5017.	Question : The primay reason for a passive flow of water from soil into the atmosphere through the plant body is
Answer» COHESIVE forces Adhesive forces Tension Water POTENTIAL gradient Answer :D

Discussion

5018.	Question : The primate which existed 15 mya was
Answer» Homo habilis Austrlopithecus RAMAPITHECUS Homo eractus. Solution :Ramapithecus APPEARED about 15 million YEARS ago in pliocene epoch. Fossil of Ramapithecus was discovered by Edward Lewis (1932) from rocks of SHIVALIK Hills of india.

Discussion

5019.	Question : The primate which existed 15 mya among these was
Answer» HOMO habilis Australopithecines Ramapithecus Homo ERECTUS ANSWER :C

Discussion

5020.	Question : The primate, which existed 15 million years ago, among these was
Answer» HOMO habilis Australopithecus RAMAPITHECUS Homo erectus Solution :Ramapithecus

Discussion

5021.	Question :The primary treatment of waste water involves the removal of
Answer» DISSOLVED impurities Stable particles Toxic substances Harmful bacteria Solution :Primary treatments basically involves physical REMOVAL of particles from sewage through: (i) filtration and (ii) sedimentation These are removed in stages : (i) Initially floating DEBRIS is removed by SEQUENTIAL filtration. (ii) Then the GRIT (soil and pebbles) are removed by sedimentation

Discussion

5022.	Question : The primary treatment of waste water involves the removal of :
Answer» DISSOLVED IMPURITIES stable particles toxic substances HARMFUL bacteria Answer :B

Discussion

5023.	Question : The primary producers of the deep-sea hydrothermal vent ecosystem are
Answer» GREEN algae chemosynthetic BACTERIA blue-green algae CORAL reefs SOLUTION :chemosynthetic bacteria

Discussion

5024.	Question : The primary productivity is least in
Answer» CORAL reef grassland coniferous forest desert Answer :D

Discussion

5025.	Question :The primary source of energy·for all living organisms is_____
Answer» ANSWER :SUN

Discussion

5026.	Question : The primary lymphoid organ is
Answer» Spleen Tonsils Bone marrow Appendix Answer :C

Discussion

5027.	Question : The primary mycelia multiply by conidia - like spores called
Answer» pycniospores BASIDIOSPORES ASCOSPORES Both (a) and (B) ANSWER :A

Discussion

5028.	Question : The primary food plant ofsilk worm is _________________.
Answer» ANSWER :CASTOR PLANT

Discussion

5029.	Question : The primary electron acceptor in PSII is
Answer» FERREDOXIN PQ PLASTOCYANIN PHEOPHYTIN ANSWER :D

Discussion

5030.	Question : The primary dentition in human differs from permanent dentition in not having one of the following types of teeth?
Answer» Incisors Carines Premolars Molars ANSWER :C

Discussion

5031.	Question : The primary cell wall may contain:
Answer» Cellulose Pectic compounds Certain polysaccharides All of these Answer :D

Discussion

5032.	Question : The primary electron acceptor in cyclic photo phosphorylation is
Answer» A PROTEIN that contains IRON and sulphur Carbon DIOXIDE FAD NADP Answer :A

Discussion

5033.	Question : The primary and secondary immune responses are elicitied by ..........
Answer» B-lymphocytes T-lymphocytes H-lymphocytes Both (A) and (B) SOLUTION :Both (A) and (B)

Discussion

5034.	Question : The Prickly pear cactus introduced into Australia in the early 1920's caused havoc by spreading rapidly in to millions of hectares of rangeland qbecause -
Answer» There is no competitor Due to less INTRA specific competition Absence of NATURAL predator Availability of HIGH nutrient Answer :C

Discussion

5035.	Question : The prickly pear cactus caused havoc by spreading rapidly into millions of hectares of rangeland of Australia in early 20th century because
Answer» PRICKLY pear cactus is a native of AUSTRALIA An exotic species of moth was INTRODUCED into Australia There were no NATURAL predators of the cactus in Australia. It had a mutualistic relationship with moths Answer :C

Discussion

5036.	Question : The prevention of large scale loss of biological integrity is …………… .
Answer» a) Biopatent b) BIOETHICS c) BIOSAFETY d) BIOFUEL SOLUTION :Biosafety

Discussion

5037.	Question : The prevention of large scale loss of biological integrity
Answer» Biopatent Bioethics Biosafety Biofuel Answer :A::B::C

Discussion

5038.	Question : The pressure of a. Physical berries between stigma and stamen prevents autogamy. This phenomenon is called as
Answer» HERKOGAMY HETEROSTYLY Dichogamy Cleistogamy Answer :A

Discussion

5039.	Question : The pressure flow of mass flow hypothesis of pholem translocation explains that
Answer» Sugars are loaded actively in sieve tubes INCOMING sugars are actively transported out of the phloem and removed as COMPLEX carbohydrates Loss of solute produce as low `Psi_(W)`in the pholem More than ONE option is CORRECT Answer :D

Discussion

5040.	Question : The_______ pressure of guard cells is responsible for the opening of stomata.
Answer» ANSWER :TURGOR

Discussion

5041.	Question : The pressure exerted by cell wall to balance turgor pressure is called______.
Answer» ANSWER :WALL PRESSURE

Discussion

5042.	Question : The pressure develops in xylem vessels during active transpiration is
Answer» NEGATIVE and push Positive and pull Negative and pull Positive and push Answer :C

Discussion

5043.	Question : The pressure developed in tracheary elements of xylem due to metabolic activity of roots 1s called:
Answer» OP TP Root PRESSURE ATMOSPHERIC pressure Answer :C

Discussion

5044.	Question : The pressure develop in xylem in herbs and in tall trees respectively during ascent of sap
Answer» POSITIVE, positive Negative, negative Positive, negative Negative, positive Answer :C

Discussion

5045.	Question : The preserved fossil remains of Archaeopteryx show that
Answer» it was flying reptile from the Permain period reptiles gave rise to birds during JURASSIC period it was a flying reptile in the Triassic period reptiles gave rise to birds during Permian period. Solution :The EARLIEST BIRD Archaeopteryx is considered to be a MISSING link between reptiles and birds, as it POSSESSES both reptilian as well as avaian characters.

Discussion

5046.	Question :The present population growth rate in India is alarming. Suggest ways to check it.
Answer» Solution :Currently the rate of population rise in India is like a warning that warning like GROWTH rate leads to scarcity to our basic necessities like food, shelter and cloth in place of more progress in respective fields. To eradicate this problem we should do FOLLOWING remedies. (i) The marriageable age of female should be made 18 years and males age should be made 21 by making increase in them. (ii) The couples should be motivated to family planning by adopting with birth control measures. (iii) Couples with SMALL families should be given incentives. (iv) People must be educated about disadvantages of uncontrolled population rise.

Discussion

5047.	Question : The presence of temporary gills in the embryos of snakes,birds and man indicates that
Answer» the lungs evolved from gills these embryos need gills for breething ancestors of these animals had gills at ONE STAGE of evolution medium, in which these embryos DEVELOP resembles oxygen RICH water Answer :C

Discussion

5048.	Question : The presence of salts (NaCl and other) in the animal body fluids gives an inference that life originated in
Answer» RAIN WATER PRIMITIVE ocean salt solution None of these Answer :B

Discussion

5049.	Question : The presence of light and dark band is a feature of
Answer» CARDIAC muscle SKELETAL muscle Smooth muscle Both (1) & (2) Answer :D

Discussion

5050.	Question : The presence of gill slits, in the embryos of all vertebrates, supports the theory of
Answer» metaorphosis biogenesis organic evolution recapitulation. SOLUTION :N//A

Discussion

Explore topic-wise InterviewSolutions in .

Question : The proces of transformation is not affected by which of the following enzymes? A. Dnase,B. Rnase c. Peptidase , D. Lipase

Question : The procedure of GIFT involves the transfer of female gamete to the fallopian tube. Can gametes be transferred to the uterus to achieve the same result ? Explain.

Question : The procedure of GIFT involves the transfer of female gametes into the fallopian tube, can gametes be transferred to the uterus to achieve the same result? Explain.

Question : The probability of the male child of a haemophiliac father and normal mother becoming haemophiliac.

Question : The probable ancestors of modern day frogs and salamanders are

Question : The probability of fruit set in a self - pollinated bisexual flower of a plant is far greater than a dioecious plant. Explain.

Question : Theprinciple patendingpiratesare

Question : The principle of competitive exclusion was

Question : The principle of Vaccination and Immunization is based on which property ?

Question : The principal tail piece of human sperm shows the microtubular arrangement of (a) 7+2(b) 9+2(c) 11+2 (d) 13+2

Question : The principal nitrogenous excretory compound in humans is synthesised in

Question : The principal genetic material of living being is……………..

Question : The principal coloring agent present in the leaf paste of Lawsonia inermis which give orange to dark red when applied on skin is __________ .

Question : The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:

Question : The primitive earth earth conditions were experimentally shown by

Question : the primitive earth contains

Question : The primay reason for a passive flow of water from soil into the atmosphere through the plant body is

Question : The primate which existed 15 mya was

Question : The primate which existed 15 mya among these was

Question : The primate, which existed 15 million years ago, among these was

Question :The primary treatment of waste water involves the removal of

Question : The primary treatment of waste water involves the removal of :

Question : The primary producers of the deep-sea hydrothermal vent ecosystem are

Question : The primary productivity is least in

Question :The primary source of energy·for all living organisms is_____

Question : The primary lymphoid organ is

Question : The primary mycelia multiply by conidia - like spores called

Question : The primary food plant ofsilk worm is _________________.

Question : The primary electron acceptor in PSII is

Question : The primary dentition in human differs from permanent dentition in not having one of the following types of teeth?

Question : The primary cell wall may contain:

Question : The primary electron acceptor in cyclic photo phosphorylation is

Question : The primary and secondary immune responses are elicitied by ..........

Question : The Prickly pear cactus introduced into Australia in the early 1920's caused havoc by spreading rapidly in to millions of hectares of rangeland qbecause -

Question : The prickly pear cactus caused havoc by spreading rapidly into millions of hectares of rangeland of Australia in early 20th century because

Question : The prevention of large scale loss of biological integrity is …………… .

Question : The prevention of large scale loss of biological integrity

Question : The pressure of a. Physical berries between stigma and stamen prevents autogamy. This phenomenon is called as

Question : The pressure flow of mass flow hypothesis of pholem translocation explains that

Question : The_______ pressure of guard cells is responsible for the opening of stomata.

Question : The pressure exerted by cell wall to balance turgor pressure is called______.

Question : The pressure develops in xylem vessels during active transpiration is

Question : The pressure developed in tracheary elements of xylem due to metabolic activity of roots 1s called:

Question : The pressure develop in xylem in herbs and in tall trees respectively during ascent of sap

Question : The preserved fossil remains of Archaeopteryx show that

Question :The present population growth rate in India is alarming. Suggest ways to check it.

Question : The presence of temporary gills in the embryos of snakes,birds and man indicates that

Question : The presence of salts (NaCl and other) in the animal body fluids gives an inference that life originated in

Question : The presence of light and dark band is a feature of

Question : The presence of gill slits, in the embryos of all vertebrates, supports the theory of