24277 + Interview Questions in Biology in Class 12 Page 472 InterviewSolution

23551.	Question : A gene that masks another genes expression is called
Answer» DOMINANT characters Recessive characters Epistatic Assorted Answer :C

Discussion

23552.	Question :A gene that masks another gene's expression is called :
Answer» DOMINANT RECESSIVE EPISTATIC assorted Answer :C

Discussion

23553.	Question : A gene showing codominance has
Answer» one allele dominant on the other ALLELES TIGHTLY LINKED on-the same chromosome alleles that are RECESSIVE to each other Both alleles independently expressed in the heterozygote Solution :Both alleles independently expressed in the heterozygote

Discussion

23554.	Question : A gene pool consists of
Answer» the entire genome of a reproducing individual the TOTAL of all ALLELES present in a population the FREQUENCIES of alleles for a gene LOCUS within the population all the GAMETES in a population Answer :B

Discussion

23555.	Question : A Gene locus has two alleles A, a. if the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominants, heterozygous and homozygous recessiveindividual in the population?
Answer» `0.16(AA)`,`0.24(Aa)`,`0.36(aa)` `0.16(AA)`,`0.48(Aa)`,`0.36(aa)` `0.16(AA)`,`0.36(Aa)`, `0.48(aa)` `0.36(AA)`,`0.48(Aa)`,`0.16(aa)` ANSWER :B

Discussion

23556.	Question : A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ?
Answer» 0.36 (AA), 0.48(Aa), 0.16 (aa) 0.16 (AA), 0.24 (Aa), 0.36 (aa) 0.16 (AA), 0.48 (Aa), 0.36 (aa) 0.16 (AA), 0.36 (Aa), 0.48 (aa) SOLUTION :0.16 (AA), 0.48 (Aa), 0.36 (aa)

Discussion

23557.	Question : (a) Gel electrohoresis : separation of DNA fragment (b) PCR : _____
Answer» SOLUTION :In-vitro amlification of GENE of INTEREST.

Discussion

23558.	Question : A gene is a
Answer» COMPLETE DNA MOLECULE SPECIFIC part of DNA molecule heterochromatic part of DNA set of ribonucleotide SOLUTION : specific part of DNA molecule

Discussion

23559.	Question : A gene incluencing many traits is
Answer» ADDITIVE Pleiotropic Epistatic Supplementary Answer :B

Discussion

23560.	Question : A gaseous mixture used in spark chamber of Millers experiment contained all of the following gases,except
Answer» Methane Ammonia Hydrogen Oxygen Answer :B

Discussion

23561.	Question : A gas produced by paddy field and connected with golbal warming is :
Answer» `CO_2` CHLORINE `H_2S` Methane Answer :D

Discussion

23562.	Question : A garden pea plant (A) Produceed inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits.
Answer» SOLUTION :DOMINANT TRAITS are GREEN and INFLATED.

Discussion

23563.	Question : A ganglion of sensory neurons occurs in
Answer» DORSAL HORN of SPINAL cord Ventral ROOT of spinal nerve Dorsal root of spinal nerve Dermis of skin Answer :C

Discussion

23564.	Question : [A] :Gall stones are pebbie sized structures that formed in the gall bladder. [R]: Gall stones develop when excess cho- lesterol in the bile precipitates out of solution, trapping calcium and bile salts.
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

23565.	Question : A gamete contains how many alleles of a gene ?
Answer» One Two All None ANSWER :A

Discussion

23566.	Question : A gamete normally contants
Answer» MANY ALLELES of a gene all alleles of a gene two alleles of a gene one ALLELE of a gene Answer :D

Discussion

23567.	Question : A fungus with coencocytic mycelium develops on moist bread is
Answer» Rhizopus Albugo Puccinia Alternaria Answer :A

Discussion

23568.	Question : A functional unit of gene which speciefic the synthesis of one polypeptide is known as :-
Answer» recon clone codon cistron Answer :D

Discussion

23569.	Question : A functionalADA cDNA can beintroducedinto cellsof thepatientsreceivinggene therapy byusing vectorconstituted by
Answer» E. COLI reovirus retrovirus AGROBACTERIUM Answer :C

Discussion

23570.	Question : A fruitfly has two genes for eye colour, but each of its sperm cell has only one. This illustrates
Answer» Segregation Independent ASSORTMENT LINKED GENES pleiotropy Answer :A

Discussion

23571.	Question : A fruit that develops from aspike or spadix infloresecne is called
Answer» CARYOPSIS ETAERIO of spikesor spadics lycornus SOROSIS ANSWER :D

Discussion

23572.	Question : A fruit developed from hypanthodium inflorescence is called
Answer» Sorosis Syconus Caryopsis Hesperidium Answer :B

Discussion

23573.	Question : A frog eats insects it is a ..........
Answer» PRIMARY CONSUMER SECONDARY consumer Tertiary CONSUMERS DECOMPOSER Solution :Secondary consumer

Discussion

23574.	Question : A freshy fruit with leathery exocarp is called
Answer» Drupe Pome Hesperidium Berry Answer :C

Discussion

23575.	Question : A free-living nitrogen-fixing cyanobacterium, which can also form symbiotic association with the water fern, Azolla is
Answer» ANABAENA Tolypothrix Chlorella Nostoc Solution :Anabaena

Discussion

23576.	Question : A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
Answer» Tolypothrix Chlorella Nostoc ANABAENA Solution :(d) Anabaena is a free living NITROGEN fixing cyanobacterium which can FORM symbiotic ASSOCIATION with WATER fern Azolla.

Discussion

23577.	Question : A free living, nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is
Answer» Tolypothrix Chlorella Nostoc Anabaena Answer :D

Discussion

23578.	Question :A free-living aerobic and nonphotosynthetic nitrogen-fixing bacterium is
Answer» Anabaena CLOSTRIDIUM AZOTOBACTER RHIZOBIUM Answer :C

Discussion

23579.	Question : A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla ………….. .
Answer» NOSTOC ANABAENA CHLORELLA Rhizobium Solution :Anabaena

Discussion

23580.	Question : A four chambereh heartis not foundin
Answer» Snakes Birds Mammals Crocodile. Solution :N//A

Discussion

23581.	Question : [A]: Fossils of Peking man were discovered from caves near Peking in 1920 by Davidson Black.[R]: It was quite intelligent to use and con- struct flint tools and is supposed to perform ceremonies
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 :C

Discussion

23582.	Question : A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using
Answer» Eco RI TAQ POLYMERASE polymerase-III LIGASE SOLUTION :ligase

Discussion

23583.	Question : (a) Forest (b ) Grassland (c ) Desert (d) Tree plantation
Answer» Solution :Tree PLANTATION. It is ARTIFICIAL MAN made ECOSYSTEM all others are natural ecosystem

Discussion

23584.	Question : A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant DNA by :
Answer» EcoRl Taq POLYMERASE DNA polymerase III DNA ligase Answer :D

Discussion

23585.	Question : [A]: For accurate measurement of Doppler echocardiography the frequency of ultra- sound waves should be noticed.[R]: Ultrasound beam can be as close to par- allel.
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 :B

Discussion

23586.	Question : [A]: For a recipient to receive blood from a donor, the recipient's plasma must not have an antibody that causes the donor's cell to agglutinate. [R]: The possibility of blood clumping does not depend on anti-A or anti-B antibody and blood type
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 :C

Discussion

23587.	Question : (a) Following are the responses of different animals to various abiotic factors .Describe each one with the help of an example: (i) Regulate ,(ii) Conform ,(iii) Migrate ,(iv) Suspend (b) If 8 individuals ina polulation of 80 butterflies die in a week calculate the death rate of polution of butterflies during that period
Answer» Solution :(a) T(i) Regualte : some organisms are ableto maintain homeostatis by regulating their BODY temperature the mechanisms used by most mammals to regualte their body temperature are similar to what we humans use Example body temperature remains constant fat `37^(@)C` In summer when outside temperature is more thant oudbody temperatuewe swerat profusely and when the temperature is much lower than `37^(@)C`we shiverthus body temperature remains constant (ii) conform : May animals maintan a constant internal ENVIRONMENT therir body temperature changes with the eabbient temperature .Since small anilas have alrger surfacer ara relative to THERI volume they tend to lose body heatvery fast when stress ful p[eriod is over . (iv) Suspend : In a animals if migration is not possible they might avoid the stress by escappin in time Example (1) Bears go into hibernation during winter (2) Fishes go into aestvation to avoid summer related problems heat and DESSICATION (b) Death rate : number of deaths per 1000 individuals of a polution death rate =8//80=0.1

Discussion

23588.	Question : A folder is a storage space that contains _______.
Answer» SOLUTION :MULTIPLE FILES

Discussion

23589.	Question : A flower with five unequal patals has largest posterior petal, two lateral slightly small petals and two anterior patals partially fused to form a boat-shaped structure. Which is not correct for such a flower ?
Answer» DESCENDING IMBRICATE aestivation ODD sapal anterior Piston MECHANISM of pollination Many carpels. Answer :D

Discussion

23590.	Question : A flower which can be divided into two exactly equal halves by any vertical division passing through centre is
Answer» ZYGOMORPHIC HYPOGYNOUS ACTINOMORPHIC Epigynous. Answer :C

Discussion

23591.	Question : A flower which can be divided into two equal halves by only one plane is
Answer» ZYGOMORPHIC Actinomorphic perfect REGULAR ANSWER :A

Discussion

23592.	Question : A flower of brinzal has 520 ovules in its ovary . However, it produces a fruit with only 480 viable seeds. (a) What could have prevented the rest of the 40 ovules from maturing into viable seeds? Explain giving a reason. (b) Describe the development of a dicot embryo in a viable seed . (c ) Why certain angiospermic seeds are albuminous while othersexalbuminous ? Explain.
Answer» SOLUTION :(a) 40 ovules are ABORTIVE . They do not produce functional VIABLE EMBRYOS.

Discussion

23593.	Question : (a) Flower is a modified stem (b) Arrangement of flower on floral axis is known as inflorescence (c) In cymose type of inflorescence flowers are arrange in basipetal or acropetal order. Which of the following statements are not correct?
Answer» a, B, C a, b b, c a, c ANSWER :D

Discussion

23594.	Question : Name the flower that can be cut into two equal halves by any- vertical plane passing through center.
Answer» ANSWER :ACTINOMORPHIC

Discussion

23595.	Question : A flaying bird lands by
Answer» FOLDING the wingd back and dropping on the ground or other substratum folding the WINGS above and back of the BODY and coming down lowering and fanning out the RETRICES pronation and forward MOVEMENTS of wings Answer :D

Discussion

23596.	Question : A flagellum is composed of
Answer» INCLUSION bodies, filament and HOOK Filament, hook and BASAL body Filament, cell wall and cell membrane Filament, mesosomes and basal body Answer :B

Discussion

23597.	Question : A five week old embryo has Wolffian and Mullerian duct and after completing seven weeks one of two ducts is disappeared due to secretion of hormone 'A'. Identify the hormone 'A' and what will be the sex of embryo in future?
Answer» TESTOSTERONE, male AMH, male Estrogen, female Inhibin, female Answer :B

Discussion

23598.	Question : A fine powder of recycled modified plastic is known as
Answer» polyblend polythene polyester polymer Answer :A

Discussion

23599.	Question : A filamentous nitrogen fixing bacterium is present in root nodules of flowering plants.
Answer» CICER arietinum Casuarina equisetifolia Cycas revoluta Crotalaria juncea. Answer :B

Discussion

23600.	Question : A file like rasping organ for feeding called Radula, present in the phylum
Answer» hemichordata mollusca echinodermata arthropoda Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : A gene that masks another genes expression is called

Question :A gene that masks another gene's expression is called :

Question : A gene showing codominance has

Question : A gene pool consists of

Question : A Gene locus has two alleles A, a. if the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominants, heterozygous and homozygous recessiveindividual in the population?

Question : A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4 then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population ?

Question : (a) Gel electrohoresis : separation of DNA fragment (b) PCR : _____

Question : A gene is a

Question : A gene incluencing many traits is

Question : A gaseous mixture used in spark chamber of Millers experiment contained all of the following gases,except

Question : A gas produced by paddy field and connected with golbal warming is :

Question : A garden pea plant (A) Produceed inflated yellow pod, and another plant (B) of the same species produced constricted green pods. Identify the dominant traits.

Question : A ganglion of sensory neurons occurs in

Question : [A] :Gall stones are pebbie sized structures that formed in the gall bladder. [R]: Gall stones develop when excess cho- lesterol in the bile precipitates out of solution, trapping calcium and bile salts.

Question : A gamete contains how many alleles of a gene ?

Question : A gamete normally contants

Question : A fungus with coencocytic mycelium develops on moist bread is

Question : A functional unit of gene which speciefic the synthesis of one polypeptide is known as :-

Question : A functionalADA cDNA can beintroducedinto cellsof thepatientsreceivinggene therapy byusing vectorconstituted by

Question : A fruitfly has two genes for eye colour, but each of its sperm cell has only one. This illustrates

Question : A fruit that develops from aspike or spadix infloresecne is called

Question : A fruit developed from hypanthodium inflorescence is called

Question : A frog eats insects it is a ..........

Question : A freshy fruit with leathery exocarp is called

Question : A free-living nitrogen-fixing cyanobacterium, which can also form symbiotic association with the water fern, Azolla is

Question : A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is

Question : A free living, nitrogen-fixing cyanobacterium which can also form symbiotic association with the water fern Azolla is

Question :A free-living aerobic and nonphotosynthetic nitrogen-fixing bacterium is

Question : A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fern Azolla ………….. .

Question : A four chambereh heartis not foundin

Question : [A]: Fossils of Peking man were discovered from caves near Peking in 1920 by Davidson Black.[R]: It was quite intelligent to use and con- struct flint tools and is supposed to perform ceremonies

Question : A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant plasmid using

Question : (a) Forest (b ) Grassland (c ) Desert (d) Tree plantation

Question : A foreign DNA and plasmid cut by the same restriction endonuclease can be joined to form a recombinant DNA by :

Question : [A]: For accurate measurement of Doppler echocardiography the frequency of ultra- sound waves should be noticed.[R]: Ultrasound beam can be as close to par- allel.

Question : [A]: For a recipient to receive blood from a donor, the recipient's plasma must not have an antibody that causes the donor's cell to agglutinate. [R]: The possibility of blood clumping does not depend on anti-A or anti-B antibody and blood type

Question : A folder is a storage space that contains _______.

Question : A flower with five unequal patals has largest posterior petal, two lateral slightly small petals and two anterior patals partially fused to form a boat-shaped structure. Which is not correct for such a flower ?

Question : A flower which can be divided into two exactly equal halves by any vertical division passing through centre is

Question : A flower which can be divided into two equal halves by only one plane is

Question : (a) Flower is a modified stem (b) Arrangement of flower on floral axis is known as inflorescence (c) In cymose type of inflorescence flowers are arrange in basipetal or acropetal order. Which of the following statements are not correct?

Question : Name the flower that can be cut into two equal halves by any- vertical plane passing through center.

Question : A flaying bird lands by

Question : A flagellum is composed of

Question : A five week old embryo has Wolffian and Mullerian duct and after completing seven weeks one of two ducts is disappeared due to secretion of hormone 'A'. Identify the hormone 'A' and what will be the sex of embryo in future?

Question : A fine powder of recycled modified plastic is known as

Question : A filamentous nitrogen fixing bacterium is present in root nodules of flowering plants.

Question : A file like rasping organ for feeding called Radula, present in the phylum