24277 + Interview Questions in Biology in Class 12 Page 456 InterviewSolution

22751.	Question : Acceptor of CO_2 in C_4 and C_3 plants respectively
Answer» PEP CASE and RUBISCO OAA and PGA PEP and RUBP PGAL and malic ACID ANSWER :C

Discussion

22752.	Question : A type of granulocyte and agranulocyte (i) are phagocytic cells that destroy foreign organisms entering the body. (ii) secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions. (iii) resist infections and are also associated with allergic reactions. (iv) are responsible for the immune responses of the body.
Answer» `{:(i,ii,III,iv),("MONOCYTES","Neutrophils","BASOPHILS","Eosinophils"):}` `{:(i,ii,iii,iv),("Neutrophils","Basophils","Eosinophils" Monocytes"):}` `{:(i,ii,iii,iv),("Neutrophils","Monocytes","Eosinophils","Basophils"):}` `{:(i,ii,iii,iv),("Monocytes","Neutrophils","Eosinophils","Basophils"):}` Answer :B

Discussion

22753.	Question : Accessory glands associated with the genital organs in female rats are i.Vestibular Bartholins , ii.Cowper's gland , iii.Ampullary glands , iv.Vesicular gland
Answer» i and II III and ii IV only I only ANSWER :D

Discussion

22754.	Question : A tumour inducing plasmid widely used in the production of transgenic plants is that of
Answer» ESCHERICHIA coli Bacillus thuringiensis Staphylococcus AUREUS AGROBACTERIUM tumefaciens Answer :D

Discussion

22755.	Question : A tumour inducing plasmid widely used in the production of transgenic plants in that of :
Answer» ESCHERICHIA coli Bacillus thuringiensis Staphylococus aureus Agrobacterium tumefaciens Answer :D

Discussion

22756.	Question : Accessory sexual character in female is promoted by
Answer» ANDROGENS PROGESTERONE Estrogens Testosterone ANSWER :C

Discussion

22757.	Question : A true breeding tall pea plant crossed with the true breeding drawf plant gave F_(1) selfing resulted in 787 tall and 277 dwarf plants in F_(2) generation. The F_(1) plants are
Answer» Homozygous Heterozygous Azygous Polyzygous Answer :B

Discussion

22758.	Question : Abyssinian oat is a teraploid with 28 chromosomes. The common cultivated oat is a hexaploid in the same series. How many chromosomes does the common oat possess?
Answer» 28 34 38 42 Answer :D

Discussion

22759.	Question : A: true vocal cord are located above the false vocal cords and participate in sound production.B:false vocal cord are located above thetrue vocal cords do not participate in sound production.
Answer» both [A] & [B] are CORRECT only [A] is correct Only [B] is correct both[A] & [B] are incorrect Answer :C

Discussion

22760.	Question : Abundance of phosphate, causing algal overgrowth, resulting in depletion of oxygen and killing other aquatic life is known as ……… .
Answer» ECOLOGICAL succession eutrophication guano deposits greenhouse effect Answer :B

Discussion

22761.	Question : A true breeding plant producing red flowrs is crossed with a pure plant producing white flowers . Allele for red colour of flower is dominant . After selfing the plants of first filial generation , the proportion of plants producing white flowers in the progeny would be :
Answer» `3//4` `1//4` `1//3` `1//2` ANSWER :B

Discussion

22762.	Question : Acceptor molecule for Krebs cycle is______.
Answer» ANSWER :oxaloacetic ACID

Discussion

22763.	Question :A true breeding plant producing red flowers is crossed with a pure plant producing white flowers. Allele for red colour of flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flowers in the progeny would be
Answer» `3//4 ` `1//4` `1//3` `1//2` ANSWER :B

Discussion

22764.	Question : A tRNA is charged with the aminoacids methionine. (i) Give the anti-codon of this tRNA.(ii) Write the codon for methionine.(iii) Name the enzyme responsible for binding of aminoacid to tRNA.
Answer» Solution :(a) UAC(B) AUG ( c ) Amino-acyl-tRNA synthetase.

Discussion

22765.	Question : Acacia nilotica var. Indica is scientific name of ______.
Answer» INDIAN crow Indian Babul cabbage banyan tree Answer :B

Discussion

22766.	Question : A true breeding homozygous pea plant with green pods and axial flowers as dominant characters, 18 crossed with a recessive homozygous pea plant with yellow pods and terminal flowers. Work out the cross upto F_2 generation giving the phenotypic ratios of F_1 and F_2 generation respectively. (b) State the Mendelianprinciple which can be derived from such a cross and not from monohybird cross.
Answer» Solution :(a) The OPERON has POLYCISTRONIC structural genes, i. E., three structural genes adjacent to an operator, a promoter and a regulator. (B) Lactose IS the inducer that inactivates repressor. This ALLOWS RNA polymerase access to the promoter and initiate transcription of the structural genes or switch on the operon. (b) From the above cross law of independent assortment can be derived which states that when two pairs of traits are combined in a hybrid, segregation of one pair of character is independent of the other pair of characters.

Discussion

22767.	Question : abundance of a species population within its habitat is
Answer» ABSOLUTE DENSITY REGIONAL density relative density NICHE density Answer :D

Discussion

22768.	Question : what istruebreedingline?
Answer» one-that is able to breed on its own produced DUE to cross-pollination among unrelated plants near HOMOZYGOUS and produces OFFSPRING of its own KIND always homozygous recessive in its genetic CONSTITUTION Solution :near homozygous and produces offspring of its own kind

Discussion

22769.	Question : Absorptive nutrition is the characteristic features of the kingdom:
Answer» Monera Protista Fungi Animalia Answer :C

Discussion

22770.	Question : a. Trisomy of 21st chromosome b. Palm crease c. Partialy open mouth d. Retarded psychomotor development Above information is related with
Answer» KLINEFELTER's syndrome Turner's syndrome Edward's syndrome Down's syndrome Answer :D

Discussion

22771.	Question : [A]: Triplet code is a degenerate one. [R]: Explanation for degeneracy is provided by Wobble hypothesis
Answer» If both A and R are true and R is the correct EXPLANATION of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false ANSWER :A

Discussion

22772.	Question : Absorption of water by root hairs is an example for
Answer» PASSIVE TRANSPORT of water Energy is not utilised Special TYPE of DIFFUSION of solvents All the above Answer :D

Discussion

22773.	Question : A treeless biome is :
Answer» Tundra Grassland Desert All of the above Answer :D

Discussion

22774.	Question : Absorption of water by velamen roots is due to
Answer» ENDOSMOSIS Deplasmolysis Transpiration Imbibition Answer :D

Discussion

22775.	Question : A trihybride plant was selfed and 2560 seeds were obtained. How many seeds will produce plant with all recessive characters ?
Answer» 100 40 128 256 Answer :B

Discussion

22776.	Question :A tree grows at a rateof 0-5 m/yr . What will be the height of a board fixed at 1-5 m above the base, five years ago
Answer» 4 m 3-5 m 1-5 m 4-5 m Answer :C

Discussion

22777.	Question : Absorption of ions by root hairs is
Answer» ALWAYS active Mostly active Always passive Mostly passive Answer :B

Discussion

22778.	Question : A transverse section of a plant material shown the following anatomical features under a microscope : Thick cuticle , stomata discontinuous sclerenchymatous hypodermis , Armed parenchyma , 'T' shaped sclerenchymatous girdle , Two - conjoint , collateral and open vascular bundle . the plant material must be a
Answer» CYCAS RACHIS Cycas leaflet Pinus needle Nerium leaf Answer :C

Discussion

22779.	Question : Absorption of any liquid without formationof a solution due to hydrophilic colloids.
Answer» ANSWER :Imbition

Discussion

22780.	Question : A transplant between individuals of the same species, but with different MHC/HLA alleles is
Answer» autograft isograft xenograft allograft Answer :D

Discussion

22781.	Question : [A]: Translocation involves transfer of genetic material between homologous chromo- some. [R]: Translocation involves duplication of ge- netic material causing chromosomal aberra- tion during gametes formation.
Answer» If both A and R are TRUE and R is the correct explanation of A If both A and R are true but R is not the correct explanation of A If A is true and R is FALSE If both A and R are false Answer :D

Discussion

22782.	Question : Absence of one sex chromosome casuse:
Answer» Down SYNDROME TURNER syndrome Turner syndrome Tay-Sach syndrome ANSWER :B

Discussion

22783.	Question : A transitional zone between the sea and river.
Answer» ANSWER :ESTUARY

Discussion

22784.	Question : Absence of which chromosome causes Turner's syndrome ?
Answer» ANSWER :Y-chromosome

Discussion

22785.	Question : A transgenic food crop, which may help in solving the problem of night blindness in developing countries is
Answer» (a) Flavr savr TOMATOES (b) starlink MAIZE (c) BT SOYABEAN (d) Golden rice Answer :D

Discussion

22786.	Question : Absolute refractory period of heart is during
Answer» CONTRACTION when the heart is in non-responding PERIOD expansion negative CHARGE positive charge. Answer :A

Discussion

22787.	Question : A transgenic food crop which may help in solving the problem of night blindness in developing countries is
Answer» Bt SOYABEAN Golden RICE FlavrSavr Tomatoes Starlink MAIZE SOLUTION :Golden Rice

Discussion

22788.	Question : A transgenic food crop which may help in solving the problem of night blindness in developing countries is:
Answer» GOLDEN rice Bt Soyabean Starlink maize Flavr SAVR tomatoes Answer :A

Discussion

22789.	Question :Absence of jaw is the feature of
Answer» MYXINE Eptatretus PETROMYZON All of these Answer :D

Discussion

22790.	Question : A transcriptional unit is given below, observe it and answer the questions. How can you identify the coding strand?
Answer» SOLUTION :5. - UCAGUACA -3.

Discussion

22791.	Question : Abcisic acid promotes
Answer» CELL DIVISION Dormacy Shoot ELONGATION Cell elongation and wall FORMATION Answer :B

Discussion

22792.	Question : A transgenic food crop whichmay help in solving the problem of night blindness in developing countries is
Answer» BT cotton golden rice Flavr Bt corn Answer :B

Discussion

22793.	Question : Abscisic acid is known as the stress hormone because it:
Answer» BREAK SEED dormacy Induces flowering Promotes LEAF fall Promotes CLOSURE of stomata Answer :D

Discussion

22794.	Question : A transcription unit is defined by three regions in DNA as
Answer» PROMOTER, terminator and inducer Promoter, STRUCTURAL GENE and terminator Inducer, Structural gene and Operator Promoter, Operator and Structural gene Answer :B

Discussion

22795.	Question : Above given pie chart is showing number of vertebrate species. In above pie chart identify 'R' is representing species of:-
Answer» Mammals Amphibians Birds Fishes Answer :C

Discussion

22796.	Question : A : To control air pollution, remove photochemical smoke. R : Photochemical smoke is product of industriesBoth A and R are true and R is correct explanation of ABoth A and R are true but R is not correct explanation of A A is true but R is false.A is false but R is true.
Answer» Both A and R are true and R is correct EXPLANATION of A Both A and R are true but R is not correct explanation of A A is true but R is false. A is false but R is true. ANSWER :B

Discussion

22797.	Question : Above this minimum vertical distance, the gravity potential is not nagligible
Answer» 1 m 5 m 10 m 20 m Answer :C

Discussion

22798.	Question : A touch on the right hand stimulates neurons in :
Answer» Left SOMATIC sensory area Right somatic sensory area Both (A) and (B) NONE of these Answer :A

Discussion

22799.	Question : A tissue which faces body fluid or the outside environment and provide a covering for some part of the body –
Answer» EPITHELIUM tissue Connective tissue Muscular tissue Neural tissue Answer :A

Discussion

22800.	Question : Abrupt and distinct change in the structure of a gene is called :
Answer» POINT MUTATION forward mutation backward mutation CHROMOSOMAL aberration Answer :A

Discussion

Explore topic-wise InterviewSolutions in .

Question : Acceptor of CO_2 in C_4 and C_3 plants respectively

Question : Accessory glands associated with the genital organs in female rats are i.Vestibular Bartholins , ii.Cowper's gland , iii.Ampullary glands , iv.Vesicular gland

Question : A tumour inducing plasmid widely used in the production of transgenic plants is that of

Question : A tumour inducing plasmid widely used in the production of transgenic plants in that of :

Question : Accessory sexual character in female is promoted by

Question : A true breeding tall pea plant crossed with the true breeding drawf plant gave F_(1) selfing resulted in 787 tall and 277 dwarf plants in F_(2) generation. The F_(1) plants are

Question : Abyssinian oat is a teraploid with 28 chromosomes. The common cultivated oat is a hexaploid in the same series. How many chromosomes does the common oat possess?

Question : A: true vocal cord are located above the false vocal cords and participate in sound production.B:false vocal cord are located above thetrue vocal cords do not participate in sound production.

Question : Abundance of phosphate, causing algal overgrowth, resulting in depletion of oxygen and killing other aquatic life is known as ……… .

Question : A true breeding plant producing red flowrs is crossed with a pure plant producing white flowers . Allele for red colour of flower is dominant . After selfing the plants of first filial generation , the proportion of plants producing white flowers in the progeny would be :

Question : Acceptor molecule for Krebs cycle is______.

Question :A true breeding plant producing red flowers is crossed with a pure plant producing white flowers. Allele for red colour of flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flowers in the progeny would be

Question : A tRNA is charged with the aminoacids methionine. (i) Give the anti-codon of this tRNA.(ii) Write the codon for methionine.(iii) Name the enzyme responsible for binding of aminoacid to tRNA.

Question : Acacia nilotica var. Indica is scientific name of ______.

Question : abundance of a species population within its habitat is

Question : what istruebreedingline?

Question : Absorptive nutrition is the characteristic features of the kingdom:

Question : a. Trisomy of 21st chromosome b. Palm crease c. Partialy open mouth d. Retarded psychomotor development Above information is related with

Question : [A]: Triplet code is a degenerate one. [R]: Explanation for degeneracy is provided by Wobble hypothesis

Question : Absorption of water by root hairs is an example for

Question : A treeless biome is :

Question : Absorption of water by velamen roots is due to

Question : A trihybride plant was selfed and 2560 seeds were obtained. How many seeds will produce plant with all recessive characters ?

Question :A tree grows at a rateof 0-5 m/yr . What will be the height of a board fixed at 1-5 m above the base, five years ago

Question : Absorption of ions by root hairs is

Question : Absorption of any liquid without formationof a solution due to hydrophilic colloids.

Question : A transplant between individuals of the same species, but with different MHC/HLA alleles is

Question : [A]: Translocation involves transfer of genetic material between homologous chromo- some. [R]: Translocation involves duplication of ge- netic material causing chromosomal aberra- tion during gametes formation.

Question : Absence of one sex chromosome casuse:

Question : A transitional zone between the sea and river.

Question : Absence of which chromosome causes Turner's syndrome ?

Question : A transgenic food crop, which may help in solving the problem of night blindness in developing countries is

Question : Absolute refractory period of heart is during

Question : A transgenic food crop which may help in solving the problem of night blindness in developing countries is

Question : A transgenic food crop which may help in solving the problem of night blindness in developing countries is:

Question :Absence of jaw is the feature of

Question : A transcriptional unit is given below, observe it and answer the questions. How can you identify the coding strand?

Question : Abcisic acid promotes

Question : A transgenic food crop whichmay help in solving the problem of night blindness in developing countries is

Question : Abscisic acid is known as the stress hormone because it:

Question : A transcription unit is defined by three regions in DNA as

Question : Above given pie chart is showing number of vertebrate species. In above pie chart identify 'R' is representing species of:-

Question : A : To control air pollution, remove photochemical smoke. R : Photochemical smoke is product of industriesBoth A and R are true and R is correct explanation of ABoth A and R are true but R is not correct explanation of A A is true but R is false.A is false but R is true.

Question : Above this minimum vertical distance, the gravity potential is not nagligible

Question : A touch on the right hand stimulates neurons in :

Question : A tissue which faces body fluid or the outside environment and provide a covering for some part of the body –

Question : Abrupt and distinct change in the structure of a gene is called :