24277 + Interview Questions in Biology in Class 12 Page 136 InterviewSolution

6751.	Question :The contribution of cytoplasmic DNA in cell.s total DNA is
Answer» `65%` `1-5% ` `10-12%` `0-0.5%` ANSWER :B

Discussion

6752.	Question : The contraction of gall bladder is due to:
Answer» Enterogastrone Gastrin Cholecystokinin Secretin Answer :C

Discussion

6753.	Question : The contractie element present in the myofibril of a striated muscle between two successive Z-lines is called
Answer» 1. Sarcosome 2, Sarcoplasm 3. SARCOMERE 4. Sarcoplasmic reticulum Answer :C

Discussion

6754.	Question : The construction of the first recombinant DNA was done by using the native plasmid of
Answer» E. coli SALMONELLA TYPHIMURIUM BACILLUS thuringiensis Yeast SOLUTION :Salmonella typhimurium

Discussion

6755.	Question : The contraceptive .SAHELI.
Answer» is a post - coital CONTRACEPTIVE . blocks estrogen RECEPTORS in the UTERUS , preventing eggs from GETTING implanted . is an IUD . increases the concentration of estrogen and prevents ovulation in females. Answer :D

Discussion

6756.	Question : The construction of the first recombinant DNA was done by using the native plasmid of :
Answer» E.coli Salmonella typhimurium B.thuringiensis Yeast Answer :B

Discussion

6757.	Question : The ________ consists of a pair of olfactory lobes, cerebral hemispheres and diancephalon.
Answer» SOLUTION :FOREBRAIN

Discussion

6758.	Question : The connective tissue having the presence of abundant fibroblasts , macrophages and mast cells is :
Answer» `{:("Type of connective TISSUE ","Location"),("Adipose tissue","Beneath the skin"):}` `{:("Type of connective tissue ","Location"),("Areolar tissue","Beneath the skin"):}` `{:("Type of connective tissue ","Location"),("DENSE connective tissue","Tendons"):}` `{:("Type of connective tissue ","Location"),("Specialised connective tissue","Cartilage"):}` Answer :B

Discussion

6759.	Question : Common link between apes and man was
Answer» Dryopothecus Australopithecus Homo erectus Homo neanderthalensis Answer :B

Discussion

6760.	Question : The connection between 1st and 2nd ventricles with 3rd ventricle
Answer» FORAMEN ovale Foramen MAGNUM Foramen of monro Foramen of panizza Answer :C

Discussion

6761.	Question : "The conformer had not evolved to become regulators". Justify the statement.
Answer» Solution :(a) THERMOREGULATION is ENERGETICALLY expensive for many animals. (b) Small animal like shrews and humming birds cannot AFFORD so much energy for thermoregulation. (c) Heat loss or heat gain is a function of surface area. (d) Small animals have larger surface area RELATIVE to their volume. (E) They tend to lose body heat very fast when it is cold outside. (f) Then they have to expend much energy to generate body heat through metabolism.

Discussion

6762.	Question : The conditoin of fusion of filaments as well as anthers is
Answer» Gynandrous Synandrous SYNGENESIOUS PROTANDROUS ANSWER :B

Discussion

6763.	Question : The confirmatory test used to diagnose AIDS is
Answer» ELISA Western BLOT ESR PCR Answer :B

Discussion

6764.	Question : The conditions required for the origin of life
Answer» FREE GENES formation lipid membrane formation proteins acquired the PROPERTY of enzymes All the above Answer :D

Discussion

6765.	Question : The condition of free patals is called
Answer» POLYPETALOUS GAMOPETALOUS Polyphyllous Gamophyllous ANSWER :A

Discussion

6766.	Question : The condition of fusion of anthers to form a tube with filaments remaining free is
Answer» Gynandrous Monadelphous SYNGENESIOUS SYNCARPOUS ANSWER :C

Discussion

6767.	Question : The concept of "trophic structure of a community emphasizes the
Answer» Prevalent form of VEGETATION Keystone predator FEEDING relationship WITHIN community Effects of coevolution Solution :Feeding relationship within community

Discussion

6768.	Question : The concept of Red list was noted in.
Answer» 1953 1963 1973 2003 Answer :A

Discussion

6769.	Question : The concept of one gene one enzyme was proposed by :
Answer» BEADLE and Tatum Watson and crick Corners Leeuwenhoek Answer :A

Discussion

6770.	Question : The concept of " Omnis cellula-e cellula" regarding cell division was first proposed by:
Answer» Rudolf VIRCHOW THEODORE Schwann SCHLEIDEN Aristotle Answer :B

Discussion

6771.	Question : The concept of inheritance of acquired characters in support of evolution was proposed by:
Answer» DARWIN Cuvier LAMARCK DE VRIES SOLUTION :Lamarck

Discussion

6772.	Question : Write a short note on Joint Forest Management.
Answer» conservation of forest and agricultural land by the government conservation of FORESTS and wildife by the local communitites WORK in close association with the local communities for protecting and managing forests exploitation of beneficial forest PRODUCTS only. Solution :Realising the significance of participation by local communities, the Government of India in 1980s has introduced the concept of Joint Forest Management (JFM) so as to work closely with the local communities for protecting and managing forests. In return for their services to the forest, the communities get benefit of various forest products (minor forest products), and thus the forest can be conserved in a sustainable MANNER. Presently, there are 84632 JFM committees with 17.33 million hectare forest area under them. Some 85.28 lakh families are involved in them all over the country.

Discussion

6773.	Question : The concept of genetic/chromosomal basis of sex-determination was observed in
Answer» EVENING PRIMROSE BIRDS HUMANS Insects Answer :D

Discussion

6774.	Question : The concept of ' hot - spots ' was developed by :
Answer» NORMAN MYERS PAUL EHRLICH DAVID Tilman E.P. Odum Answer :A

Discussion

6775.	Question : The concept of ecological pyramids was developed by :
Answer» Elton Darwin Odum Reiter Answer :A

Discussion

6776.	Question : The concept of "centre of origin of cultivated plants was proposed by
Answer» NORMAN E. Borlaug M. S. Swaminathan Edward Jenner Nikolai Vavilov Answer :D

Discussion

6777.	Question : The concept of chemical evolution is based on:
Answer» INTERACTION of water, air and clay under intense heat Effect of SOLAR radiation of CHEMICALS Possible origin of LIFE by combination of chemicals under suitable ENVIRONMENTAL conditions Crystallization of chemicals Answer :C

Discussion

6778.	Question : The concept of chemical evolution is based on
Answer» INTERACTION of water, air and clay under intense heat effect of SOLAR radiation on chemicals possible ORIGIN of life by combination of chemicals under suitable ENVIRONMENTAL conditions crystallization of chemicals. SOLUTION :possible origin of life by combination of chemicals under suitable environmental conditions

Discussion

6779.	Question : The concentration of DDT like toxins are higher in man and eagle .a) Name the process b) Give the reason
Answer» Solution :a)BIOMAGNIFICATION b) Non biodegradablechemical whichaccumulatein the bodyof arganismbelongingto the nexttrophic level .Human BEINGS &Eaglebelong tothe lasttrophiclevel of THEFOOD chain .Hence the biomagnification THREATEN human LIFE .

Discussion

6780.	Question : The concentration of polychlorinated biphenyls (PCB, an organochloride contaminant) in many fish population has been declining, since a ban on their production was instituted in the late 1970s. PCBs remain a potential problem, however, because they are lipophilic and are know to biomagnify. Based on this knowledge, what type of fish is expected to be safest for human consumption ?
Answer» Piscivorous fish species (i.e., which eat other fish) Benthivorous fish species (i.e., which eat invertebrates on the lake bottom ) Small (YOUNG ) fish Fish species with high fat content Solution :Heavy metals and persistent pesticides (e.g., organochlorine or chlorinated hydrocarbons like DDT) pass into food CHAIN and increase in amount per unit weight of organisms with the rise in trophic level DUE to theiraccumulation in fat. This phenomenon is called biomagnification. Therefore, lower the trophic level of fish (such as small fish), lesser will be the biomagnification and HENCE SAFER it will be for consumption.

Discussion

6781.	Question :The concentration of filtrate will _____ as it moves down in the descending limb of loop of Henle
Answer» INCREASE decrease REMAIN UNCHANGED FIRST increase and then decrease Answer :A

Discussion

6782.	Question : The concentration of a macroelement per gram of dry matter in plants is at least
Answer» 1000 `mug//g` of DRY matter 100 `mugg/g` of dry matter 1500 `mug//g` of dry matter 995 `mug//g` of dry matter Answer :A

Discussion

6783.	Question : The compound, which is soluble in water but does not impede the oxygen transportation is
Answer» NO `SO_2` `CO` `SO_3` ANSWER :A

Discussion

6784.	Question : The components of nitrogenase and nitrate reductase is:
Answer» Mo Mg Mn Fe Answer :A

Discussion

6785.	Question : The composition of blood plasma and dialysing fluid is same w.r.t. all components except
Answer» Glucose Nitrogenous wastes Amino acids Na^+ ions Answer :B

Discussion

6786.	Question : The complex of several enzymes and other protein factors which act in a co-ordinate way for DNA replication.
Answer» ANSWER :replisome

Discussion

6787.	Question : The complete sequencing of human genome was proposed in this year
Answer» 1985 1995 1986 2003 Answer :C

Discussion

6788.	Question : The complex CAP-c-AMP, which increases the affinity of RNA polymerase for lac operon promoter so that the lac-genes are transcribed , is formed in
Answer» cytoplasm low GLUCOSE CONCENTRATION HIGH LACTOSE concentration high glucose concentration Answer :B

Discussion

6789.	Question : The incomplete breakdown of sugars in anaerobic respiration results in the formation of
Answer» Water and CARBON dioxide Alcohol and carbon dioxide FRUCTOSE and water GLUCOSE and carbon dioxide Answer :A

Discussion

6790.	Question : The complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms in mitochondria,leaving :-
Answer» 3 MOLECULES of `CO_2` and 2 molecules of`NADH_2` 2 molecules of `CO_2` and 3 molecules of `NADH_2 ` 3 molecules of `CO_(2)` and 4 molecules of `NADH_2` . 2 molecules of `CO_(2)` and 2 molecules of `NADH_2` ANSWER :C

Discussion

6791.	Question : The comparitive genomics enhances the understanding of
Answer» FUNCTIONS of each GENOME and their EVOLUTIONARY relationships functions of only ONE genome non-functional genes of both the genomes functions of some genes of each genome and their structural relationships. Answer :A

Discussion

6792.	Question : The common tapewarm infecting human being is
Answer» tainia solium taenia saginate diphyllobothrium latum t. echinococcus Answer :A

Discussion

6793.	Question : The commonly used animal in genetics is
Answer» echerichia COLI DROSOPHILA neurospora CHLORELLA SOLUTION :drosophila

Discussion

6794.	Question : The communities as a whole interact with the physical environment to from an apex level of organisation called_____.
Answer» ANSWER :ECOSYSTEM

Discussion

6795.	Question : The common weed Catharanthus roseus (=Vinca rosea ) is source of
Answer» HAY fever Two carcinogens-vincristin and vinblastin Two ANTICANCER drugs-vincristin and vinblastin Skin rashes Answer :C

Discussion

6796.	Question : The common symptom of nitrogen deficiency is_____in plants.
Answer» ANSWER :ANTHOCYANIN

Discussion

6797.	Question :The common nitrogen-fixer in the paddy fields is :
Answer» RHIZOBIUM AZOSPIRILLUM Oscillatoria Frankia Solution :Acetobacter ACET

Discussion

6798.	Question : The common feature of occulomotor and pathetic nerve is ………… .
Answer» both are sensory nerves both supply to eye muscles both arise from MEDULLA oblongata both INNERVATE face Answer :B

Discussion

6799.	Question : The common feature between non-cyclic and cyclic photophosphorylation is :-
Answer» PROTON gradient formation RELEASE of `O_(2) ` Formation of NADPH `+ H^(+)` PHOTOLYSIS of water Answer :A

Discussion

6800.	Question : The common form of transposons in humans is known as ……… .
Answer» BLUE sequence ss sequence ds RNA Alu sequence Answer :D

Discussion

Explore topic-wise InterviewSolutions in .

Question :The contribution of cytoplasmic DNA in cell.s total DNA is

Question : The contraction of gall bladder is due to:

Question : The contractie element present in the myofibril of a striated muscle between two successive Z-lines is called

Question : The construction of the first recombinant DNA was done by using the native plasmid of

Question : The contraceptive .SAHELI.

Question : The construction of the first recombinant DNA was done by using the native plasmid of :

Question : The ________ consists of a pair of olfactory lobes, cerebral hemispheres and diancephalon.

Question : The connective tissue having the presence of abundant fibroblasts , macrophages and mast cells is :

Question : Common link between apes and man was

Question : The connection between 1st and 2nd ventricles with 3rd ventricle

Question : "The conformer had not evolved to become regulators". Justify the statement.

Question : The conditoin of fusion of filaments as well as anthers is

Question : The confirmatory test used to diagnose AIDS is

Question : The conditions required for the origin of life

Question : The condition of free patals is called

Question : The condition of fusion of anthers to form a tube with filaments remaining free is

Question : The concept of "trophic structure of a community emphasizes the

Question : The concept of Red list was noted in.

Question : The concept of one gene one enzyme was proposed by :

Question : The concept of " Omnis cellula-e cellula" regarding cell division was first proposed by:

Question : The concept of inheritance of acquired characters in support of evolution was proposed by:

Question : Write a short note on Joint Forest Management.

Question : The concept of genetic/chromosomal basis of sex-determination was observed in

Question : The concept of ' hot - spots ' was developed by :

Question : The concept of ecological pyramids was developed by :

Question : The concept of "centre of origin of cultivated plants was proposed by

Question : The concept of chemical evolution is based on:

Question : The concept of chemical evolution is based on

Question : The concentration of DDT like toxins are higher in man and eagle .a) Name the process b) Give the reason

Question :The concentration of filtrate will _____ as it moves down in the descending limb of loop of Henle

Question : The concentration of a macroelement per gram of dry matter in plants is at least

Question : The compound, which is soluble in water but does not impede the oxygen transportation is

Question : The components of nitrogenase and nitrate reductase is:

Question : The composition of blood plasma and dialysing fluid is same w.r.t. all components except

Question : The complex of several enzymes and other protein factors which act in a co-ordinate way for DNA replication.

Question : The complete sequencing of human genome was proposed in this year

Question : The complex CAP-c-AMP, which increases the affinity of RNA polymerase for lac operon promoter so that the lac-genes are transcribed , is formed in

Question : The incomplete breakdown of sugars in anaerobic respiration results in the formation of

Question : The complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms in mitochondria,leaving :-

Question : The comparitive genomics enhances the understanding of

Question : The common tapewarm infecting human being is

Question : The commonly used animal in genetics is

Question : The communities as a whole interact with the physical environment to from an apex level of organisation called_____.

Question : The common weed Catharanthus roseus (=Vinca rosea ) is source of

Question : The common symptom of nitrogen deficiency is_____in plants.

Question :The common nitrogen-fixer in the paddy fields is :

Question : The common feature of occulomotor and pathetic nerve is ………… .

Question : The common feature between non-cyclic and cyclic photophosphorylation is :-

Question : The common form of transposons in humans is known as ……… .