24277 + Interview Questions in Biology in Class 12 Page 21 InterviewSolution

1001.	Question : When a green pod containing pea plant is crossed with a yellow pod containing pea plant in the progeny yellow pod containing plants are also produced, so green pod containing plant is
Answer» only heterozygous only HOMOZYGOUS may be homozygous or heterozygous may be homozygous Answer :A

Discussion

1002.	Question : When a hybrid tall pea plant is cross fertilized with a dwarf pea plant , the ratio of tall is to dwarf plants grown from the seeds will be :
Answer» 0.12569444444444 Answer :D

Discussion

1003.	Question : When a green full pod producing pea plant ils crossed to an yellow constricted pod producing pea plant in the progen gren fullpod and green constricted pod producing pea plants only are formed in 1:1 ratio. The genotype of tested individual is
Answer» GGFF GfFf GGFf GgFf Answer :C

Discussion

1004.	Question : When a hybrid (AaBbCcDd) is selfed then the genotypes AABbCCDd, AaBBCcDd, AaBbCcDd, aabbccdd would be in a proportion of :-
Answer» `2 : 4 : 8 : 21` `4 : 8 : 16 : 1` `4 : 8 : 16 : 27` `8 : 4 : 16 : 81` ANSWER :B

Discussion

1005.	Question : When a gene pair contains two different genes controlling different traits of a character, it is
Answer» HOMOZYGOUS HETEROZYGOUS Monozygous NONE of the above ANSWER :B

Discussion

1006.	Question : When a gerey color seed producing pea plant is crossed to white color seed producing pea plant, in the progeny 164 grey seed producing and 156 white seed producing plants are obtained. This cross is
Answer» Receprocal cross Test cross Incomplete dominance Codominance Answer :B

Discussion

1007.	Question : When a gamete without any fusion develops into a new organism the phenomenon is called SyngamyExternal FertilizationParthenogenesisParthenocarpy
Answer» Syngamy External Fertilization Parthenogenesis Parthenocarpy Answer :C

Discussion

1008.	Question : When a gamete without any fusion develops into a new organism the phenomenon is called:
Answer» SYNGAMY EXTERNAL fertilization Parthenogenesis PARTHENOCARPY ANSWER :C

Discussion

1009.	Question : When a gamete without any fusion develop into a new organisms the phenomenon is called
Answer» Syngamy External FERTILIZATION Parthenogenesis parthenocarpy Answer :C

Discussion

1010.	Question : When a foreign DNA is introduced into an organism, how is it maintained in the host and how is it transferred to the progeny of the organism ?
Answer» SOLUTION :Foreign gene is USUALLY ligated to a plasmid vector and introduced in the HOST. As plasmid replicates, and makes MULTIPLE copies of itself, so does the foreign gene gets replicated and its copes are made. When the host organism divides, its progeny also receives the plasmid DNA containing the foreign gene.

Discussion

1011.	Question : When a DNA molecule with one radioactive strand undergoes repeated replications in a medium without radioactivity for five times the number of radio labelled strands in the daughter DNA molecules
Answer» 2 1 16 32 Answer :B

Discussion

1012.	Question : When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed
Answer» tetraploidy pentaploidy diploidy triploidy Answer :A

Discussion

1013.	Question : When a dihybrid cross is fit into a Punnet square with 18 boxes, the maximum number of different phenotypes available are
Answer» 8 4 2 16 Answer :B

Discussion

1014.	Question : When a dihybrid cross is fitted into a pannet square with 16 boxes, the maximum number of different phenotypes available are
Answer» 4 4 16 12 Answer :B

Discussion

1015.	Question : When a cross is made between tall plant with yellow seeds [TtYy1 and tall plant with seed [Tt yy], What proportion of phenotype in the offspring could be expected to be
Answer» SOLUTION : = TALL green - 3/8 or 6/16 = DWARF green - 1/8 or 2/16 =PHENOTYPE RATIO = 3:1

Discussion

1016.	Question :When a dihybrid cross is fit into a punnett square with 16 boxes , the maximum number of different phenotypes available are :
Answer» 8 4 2 16 Answer :B

Discussion

1017.	Question : When a dihybrid cross is fit into a Punnet square with 16 boxes, the maximum number of different phenotypes available are
Answer» 8 4 2 16 Answer :B

Discussion

1018.	Question : When a corss is made pinkflowered and red flowered snapdragon plants, what proportionof phenotypein the offspring could beexpected to be
Answer» 0.25 0.75 0.5 0.125 Answer :C

Discussion

1019.	Question : When a cross is conducted between black feathered hen and a white feathered cock , blue feathered fowls are formed . When these fowls are allowed for interbreeding , in F_1 -generation , there are 20 blue fowls . What would be the number of black and white fowls .
Answer» BLACK 20 , WHITE 10 Black 20 , white 20 Black 10 , white 10 Black 10 , white 20 Answer :C

Discussion

1020.	Question : When a connective is prolonged into a feathery appendix beyond the anthers it is called ………….andis found inn………….
Answer» distractile NERIUM appendicualte SALVIA DIVARICATE salvia APPENDICULATE nerium ANSWER :D

Discussion

1021.	Question : When a cell is plasmolysed
Answer» TURGOR PRESSURE BECOMES negative Pressure POTENTIAL is negative Osmotic potential is negative All the above Answer :D

Discussion

1022.	Question : "When a cell is placed in isotonic solution water will come out of it by exosmosis" . Is it true or false .
Answer» ANSWER :HYPERTONIC

Discussion

1023.	Question : When a cell is fully turgid which of the following will be zero
Answer» TURGOR PRESSURE/pressure potential Wall pressure Suction pressure/DPD/water potential Osmotic pressure (SOLUTE pressure) ANSWER :C

Discussion

1024.	Question : When 12 CO_2 molecueles are utilized in C_2 cycle, number of troise phosphates exported out from the chloroplast into the cytosol for the synthesis of hexose will be
Answer» 2 4 6 12 Answer :B

Discussion

1025.	Question : When 54 molecules of CO_2 fixed by RuBisCO in a C_3 plant , number of G_3 -P participate in regeneration phase respectively
Answer» 90,18 54,54 60 , 48 18, 90 Answer :D

Discussion

1026.	Question : wheat variety having high protein content is
Answer» Kalyan SONA Himgiri Sharbati SONORA ATLAS 66 Answer :D

Discussion

1027.	Question : wheat root cells have 42 chromosomes. the number of chromosomes in a cell of pollen grain is
Answer» `14` `21` `28` `42` ANSWER :B

Discussion

1028.	Question : Wheat variety, Atlas-66 is improved for …………. .
Answer» HIGH proteins high carbohydrates high fats high vitamins Answer :A

Discussion

1029.	Question : Wheat is which of the following types of fruit
Answer» Berry Nut Caryopsis Legume(POD) ANSWER :C

Discussion

1030.	Question : Whch one of the following is an important breed of fowl?
Answer» Nageswari Jersey Rhode ISLAND Red Khaki campbell Answer :C

Discussion

1031.	Question : Whatever be the life span, death of every individual organism is a certainty, i.e., no individual is immortal, except
Answer» HUMAN beings Amoeba and Paramoecium Single-celled organisms Both B and C. Answer :D

Discussion

1032.	Question : What you meant by resource partitioning in an ecosystem.
Answer» SOLUTION : If TWO SPECIES foe the same resource, they avoid competition by choosing different times for feeding or different foraging patterens.This is called resource PARTITIONING.

Discussion

1033.	Question : What .X. indicates in the given figure?
Answer» Geitonogamy Homogamy Autogamy Cleistogamy Answer :C

Discussion

1034.	Question : What would happen when one grows a recombinant bacterium in a bioreactor but forget to add antibiotic to the medium in which the recombinant is growing ?
Answer» Solution :In the absence of ANTIBIOTIC, there will be no pressure on RECOMBINANTS to retain the PLASMID (containing the gene of your interest). Since, maintaining a high copy number of plasmids is a METABOLIC burden to the microbial cells, will thus tend to lose the plasmid.

Discussion

1035.	Question : What would happen when one grows a recombinant bacterium in a bioreactor but forget to add antibiotic to the medium in which the recombinant is growing?
Answer» SOLUTION :In the absence of antibiotic, all bacteria will grow successfully. There will be no selection pressure. So there will be no pressure on transformed bacteria to RETAIN the recombinant PLASMID and they MAY TEND to lose these plasmids.

Discussion

1036.	Question : What would happen to immune system, if thymus gland is removed from the body of a person?
Answer» Solution :Thymus is the primary lymphoid organ. In thymus GLAND, immature lymphocytes DIFFERENTIATE into antigen-sensitive lymphocytes. If thymus gland is removed from the BODY of a person, the immune system BECOMES WEAK. As a result the person.s body becomes prone to infectious diseases.

Discussion

1037.	Question :What would happen if oxygen availability to activated sludge flocs is reduced ?(A) It will slow down the rate of degradation of organic matter.(B) The centre of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.(C) Flocs would increase in size as anaerobic bacteria would grow around flocs.(D) Protozoa would grow in large numbers.
Answer» It will slow down the rate of degradation of ORGANIC matter. The centre of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs. Flocs would INCREASE in size as anaerobic bacteria would grow around flocs. PROTOZOA would grow in large numbers. Solution : If oxygen availability to activated sludge FLOES is reduced the centre of flocks will become anoxic, which would cause death of bacteria as they require oxygen and eventually breakage of flocks. As a result foul smelling products are produced in anaerobic DECOMPOSITION.

Discussion

1038.	Question : What would happen if oxygen availability to activated sludges flocs is reduced ?
Answer» It will slow down the rate of degradation of organic matter The CENTER of floes will become anoxic . which would cause death of bacteria and eventually breakage of floes Flocs would increase in SIZE as anaerobic bacteria would GROW AROUND flocs Protozoa would grow in large numbers Answer :B

Discussion

1039.	Question : What would happen if histones were to be mutated and made rich in acidic amino acids such as aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?
Answer» Solution :If HISTONE proteins were rich in acidic amino acids INSTEAD of basic amino acids then they may not have any role in DNA packaging in eukaryotes as DNA is ALSO negatively charged molecule. The packaging of DNA around the nucleosome would not happen. Consequently, the chromatin FIBRE would not be formed.

Discussion

1040.	Question :What would happen if our intestine harbours microbial flora exactly similar to that found in the rumen of cattle ?
Answer» SOLUTION :If our intestine HARBOURS microbial flora EXACTLY similar to that found in the RUMEN of cattle then we would be able to digest the cellulose PRESENT in our food.

Discussion

1041.	Question : Whate would happen if in a gene encoding a polypeptide of 50 amino acids , 25^(th) codon (UAU) is mutated to UAA
Answer» A POLYPEPTIDE of 24 amino acids will be FORMED Two polypeptides of 24 and 25 amino acids will be formed A polypeptide of 49 amino acids will be formed A polypeptide of 25 amino acids will be formed Answer :a

Discussion

1042.	Question :What would happen if a large volume of untreated sewage is discharged into a river ?
Answer» SOLUTION : Due to increasing urbanisation, sewage is being produced in much larger QUANTITIES than ever before. However, the number of sewage treatment PLANTS has not increased enough to treat such large quantities. So, the untreated sewage is often DISCHARGED directly into rivers leading to their POLLUTION and increase in waterborne diseases.

Discussion

1043.	Question : What would Earth be like without the greenhouse effect?
Answer» Solution :GREENHOUSE EFFECT is vital for the sustenance of life. Greenhouse gases like CO2, water vapour etc absorb some of the reflected sun.s radiation and radiate BACK it to the Earth surface, thus maintaining the Earth.s warm condition. Without this effect, life on Earth would be difficult or rather impossible for existence or become hostile to most LIVING organisms.

Discussion

1044.	Question : How many full turns of the Calvin cycle are required to make one molecule of glucose
Answer» 5 4 12 6 Answer :D

Discussion

1045.	Question : What would be the ploidy of the cell of the tetrad ?
Answer» ANSWER :HAPLOID;

Discussion

1046.	Question : What would be the phenotypic ratio in F_(2) generation in a dihybrid cross if both the genes show lethality in homozygous dominant state -
Answer» `2 : 2 : 2 : 2` `4 : 2 : 2 : 1` `6 : 3 : 2 : 1` `9 : 3 : 3 : 1` Answer :B

Discussion

1047.	Question : What would be the per cent growth or birth rate per indiviual per hour for the same population mentional in the previous question?
Answer» 100 200 50 150 Answer :B

Discussion

1048.	Question : What would be the percent growth or birth rate per individual per hour for the same population mentioned in the previous question (Question 10)?
Answer» 100 200 50 150 Answer :A

Discussion

1049.	Question : What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous ques- tion (Question 10 )?
Answer» 100 200 50 150 Solution :Initial number of PARAMECIUM = 50 Number of Paramecium after 1 HOUR = 150 Birth rate = `("Number of NEW Paramecium")/("Initial number of Paramecium")xx100` `=(100)/(50)xx100=200%`

Discussion

1050.	Question : What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous question ?
Answer» 100 200 50 150 SOLUTION :The per cent growth or birth rate per individual per HOUR = `("FINAL population - Initial population ")/("Initial population") XX 100` `= (150 - 50)/(50) xx 100 = 200`

Discussion

Explore topic-wise InterviewSolutions in .

Question : When a green pod containing pea plant is crossed with a yellow pod containing pea plant in the progeny yellow pod containing plants are also produced, so green pod containing plant is

Question : When a hybrid tall pea plant is cross fertilized with a dwarf pea plant , the ratio of tall is to dwarf plants grown from the seeds will be :

Question : When a green full pod producing pea plant ils crossed to an yellow constricted pod producing pea plant in the progen gren fullpod and green constricted pod producing pea plants only are formed in 1:1 ratio. The genotype of tested individual is

Question : When a hybrid (AaBbCcDd) is selfed then the genotypes AABbCCDd, AaBBCcDd, AaBbCcDd, aabbccdd would be in a proportion of :-

Question : When a gene pair contains two different genes controlling different traits of a character, it is

Question : When a gerey color seed producing pea plant is crossed to white color seed producing pea plant, in the progeny 164 grey seed producing and 156 white seed producing plants are obtained. This cross is

Question : When a gamete without any fusion develops into a new organism the phenomenon is called SyngamyExternal FertilizationParthenogenesisParthenocarpy

Question : When a gamete without any fusion develops into a new organism the phenomenon is called:

Question : When a gamete without any fusion develop into a new organisms the phenomenon is called

Question : When a foreign DNA is introduced into an organism, how is it maintained in the host and how is it transferred to the progeny of the organism ?

Question : When a DNA molecule with one radioactive strand undergoes repeated replications in a medium without radioactivity for five times the number of radio labelled strands in the daughter DNA molecules

Question : When a diploid female plant is crossed with a tetraploid male, the ploidy of endosperm cells in the resulting seed

Question : When a dihybrid cross is fit into a Punnet square with 18 boxes, the maximum number of different phenotypes available are

Question : When a dihybrid cross is fitted into a pannet square with 16 boxes, the maximum number of different phenotypes available are

Question : When a cross is made between tall plant with yellow seeds [TtYy1 and tall plant with seed [Tt yy], What proportion of phenotype in the offspring could be expected to be

Question :When a dihybrid cross is fit into a punnett square with 16 boxes , the maximum number of different phenotypes available are :

Question : When a dihybrid cross is fit into a Punnet square with 16 boxes, the maximum number of different phenotypes available are

Question : When a corss is made pinkflowered and red flowered snapdragon plants, what proportionof phenotypein the offspring could beexpected to be

Question : When a cross is conducted between black feathered hen and a white feathered cock , blue feathered fowls are formed . When these fowls are allowed for interbreeding , in F_1 -generation , there are 20 blue fowls . What would be the number of black and white fowls .

Question : When a connective is prolonged into a feathery appendix beyond the anthers it is called ………….andis found inn………….

Question : When a cell is plasmolysed

Question : "When a cell is placed in isotonic solution water will come out of it by exosmosis" . Is it true or false .

Question : When a cell is fully turgid which of the following will be zero

Question : When 12 CO_2 molecueles are utilized in C_2 cycle, number of troise phosphates exported out from the chloroplast into the cytosol for the synthesis of hexose will be

Question : When 54 molecules of CO_2 fixed by RuBisCO in a C_3 plant , number of G_3 -P participate in regeneration phase respectively

Question : wheat variety having high protein content is

Question : wheat root cells have 42 chromosomes. the number of chromosomes in a cell of pollen grain is

Question : Wheat variety, Atlas-66 is improved for …………. .

Question : Wheat is which of the following types of fruit

Question : Whch one of the following is an important breed of fowl?

Question : Whatever be the life span, death of every individual organism is a certainty, i.e., no individual is immortal, except

Question : What you meant by resource partitioning in an ecosystem.

Question : What .X. indicates in the given figure?

Question : What would happen when one grows a recombinant bacterium in a bioreactor but forget to add antibiotic to the medium in which the recombinant is growing ?

Question : What would happen when one grows a recombinant bacterium in a bioreactor but forget to add antibiotic to the medium in which the recombinant is growing?

Question : What would happen to immune system, if thymus gland is removed from the body of a person?

Question : What would happen if oxygen availability to activated sludges flocs is reduced ?

Question : What would happen if histones were to be mutated and made rich in acidic amino acids such as aspartic acid and glutamic acid in place of basic amino acids such as lysine and arginine?

Question :What would happen if our intestine harbours microbial flora exactly similar to that found in the rumen of cattle ?

Question : Whate would happen if in a gene encoding a polypeptide of 50 amino acids , 25^(th) codon (UAU) is mutated to UAA

Question :What would happen if a large volume of untreated sewage is discharged into a river ?

Question : What would Earth be like without the greenhouse effect?

Question : How many full turns of the Calvin cycle are required to make one molecule of glucose

Question : What would be the ploidy of the cell of the tetrad ?

Question : What would be the phenotypic ratio in F_(2) generation in a dihybrid cross if both the genes show lethality in homozygous dominant state -

Question : What would be the per cent growth or birth rate per indiviual per hour for the same population mentional in the previous question?

Question : What would be the percent growth or birth rate per individual per hour for the same population mentioned in the previous question (Question 10)?

Question : What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous ques- tion (Question 10 )?

Question : What would be the per cent growth or birth rate per individual per hour for the same population mentioned in the previous question ?