24277 + Interview Questions in Biology in Class 12 Page 19 InterviewSolution

901.	Question : When infected mosquito bites the host human, the larva enter his
Answer» blood saliva SKIN muscles SOLUTION :skin

Discussion

902.	Question : When in a typical dihybrid cross in F_(2) generationone monohybrid genotype is present in 12 individual the total number of F_(2) offspring is
Answer» 48 24 192 96 Answer :D

Discussion

903.	Question : When heat raysrelected from Earth, gases like Carbon dioxide, Nitrous oxide do notallow them to escape back tothe spacecausing our planet to heat up. These gases are known as
Answer» Noble gas Green- house gas HOT gas BLUE gas Solution :A greenhouse gas ( sometimesabbreviated GHG) is a gas in an ATMOSPHERE that absorbsand emitsradiationwithin the thermalinfrared range. This PROCESS is the fundamental cause of thegreenhouse effect. The primary greenhouse gasesin the Earth's atmosphere are WATER vapour, carbon dioxide, methane, nitrous oxide, and ozone.

Discussion

904.	Question : When heterozygous round seeded plant is crossed with a recessive wrinkle seededplant and round and wrinkle phenotypes will appear in F_1 in the ratio :
Answer» 1 : 2 2:1 1:1 3:1 Answer :C

Discussion

905.	Question : When gynoecium matures first it is called ____________ to effect cross pollination .
Answer» Protogyny Protandry Herkogomy Unisexuality Answer :A

Discussion

906.	Question : When gene resemble functional genes, but donot produce functional substance are called
Answer» JUMPING GENE overlapping gene pseudogene non-functional gene Answer :C

Discussion

907.	Question : When genomic DNA is fragmented and cloned, the screening of the desired gene is done by using ………. .
Answer» PLASMID DNA DNA probes Southern blotting PCR technique Answer :B

Discussion

908.	Question : When fruit develops from the ovary it is called a false/true fruit.
Answer» ANSWER :1

Discussion

909.	Question : When fallopian tube of a female is closed or male produces least sperms, then which method is effective?
Answer» MTP GIFT ZIFT IVF Answer :D

Discussion

910.	Question : When fertilization occurs outside of the body of the organisms is called internal fertilization
Answer» ANSWER :EXTERNAL FERTILIZATION

Discussion

911.	Question : When examining the TCA cycle, alpha ketoglutarate dehydrogenase complex requires the set of cofactors as which of the following?
Answer» CITRATE synthase Cis-aconitate Pyruvate dehydrogenase Fumarate Answer :C

Discussion

912.	Question : When FADH_(2)//FMNH_(2) is oxidised through ETS
Answer» Produces 2 ATP CONSUMES `1//2 O_(2)` Both 1 and 2 USES one WATER molecule Answer :C

Discussion

913.	Question : When F_1 program shown intermediate phenotype between dominant and recessive phenotypes such as gene interaction is called
Answer» COMPLETE dominance Over dominance pseudodominance Incomplete dominance Answer :D

Discussion

914.	Question : When entire inflorescence changes into a fruit it is called _____fruit.
Answer» ANSWER :COMPOSITE

Discussion

915.	Question : Whendriedraisinsare put in plain water,they swell up. Ifput again in brine solution, they shrivel up. Thisphenomenonindicatesthe property of
Answer» DIFFUSION perfusion osmosis fusion SOLUTION :Diffusion of wateracross a semi permeable membrane is called osmosis.Due to osmosis raisimswhen put inplainwaterswells upwhereaswhen putagainin brinesolution, theyshrivel up.

Discussion

916.	Question : When earth fragmented from sun, its temperature was …………...°C.
Answer» `5,000^@" to "6,000^@` `4,000^@" to "5,000^@` `3,000^@" to "4,000^@` ` 6,000^@" to "7,000^@` SOLUTION :`5,000^@" to "6,000^@`

Discussion

917.	Question : When does the growth rate of a population following the logistic model equal zero? The logistic model is given as Dn//dt =Rn (1-N//K).
Answer» When N/K EQUALS ZERO. When death rale is GREATER than birth ~re When N/K is exactly one When N nears the CARRYING CAPACITY of the habitat Answer :C

Discussion

918.	Question : When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K)
Answer» When N/K is EXACTLY one When N nears the carrying CAPACITY ofthe habitat When N/K equals zero When DEATH rate is greater than BIRTH rate Answer :A

Discussion

919.	Question : When does the growth rate of a population following the logistic model equal zero ? The logistic model is given as dN/dt = rN(1-N/K)
Answer» when N nears the CARRYING capacity of the habitat when N/K EQUALS zero when death rate is greater than birth rate when N/K is EXACTLY one ANSWER :D

Discussion

920.	Question : When does cyclic photophosphorylation take place?
Answer» SOLUTION :When noncyclic PHOTOPHOSPHORYLATION is STOPPED, cyclic photophosphorylation TAKES place.

Discussion

921.	Question : When does capacitation occurs? Define it.
Answer» Solution :The sperms deposited in the female reproductive TRACT UNDERGO CAPACITATION. It is a BIO chemical EVENT that makes the sperm to penetrate and fertilize the egg.

Discussion

922.	Question : When does a species is categorized as endangered?
Answer» SOLUTION :A SPECIES that has been categrozed as very LIKELY to become EXTINCT is an endangered species.

Discussion

923.	Question : When do we have 'World Wild life Week' ?
Answer» FIRST week of OCTOBER THIRD week of October First week of September LAST week of September Solution :First week of October

Discussion

924.	Question : When do wild animals get extinct in more quantity ?
Answer» DUE to lack of PROPER care COLLECTIVE hunting to sale to foreign countries Due to destruction of their NATURAL habitat Natural calamity Solution :Due to destruction of their natural habitat

Discussion

925.	Question : When do we fill uneasy?
Answer» FUNCTION of different parts of BODY are affected. Function of body systems are affected. SYMPTOMS of different diseases are seen All the above SOLUTION :All the above

Discussion

926.	Question :When do couple use the embryo of donor?
Answer» A MALE is having GENETIC DISEASE. A FEMALE is having genetic disease. Both male and female having genetic disease. All of the above Answer :D

Discussion

927.	Question : When do chromosomes appear short and thick? Why?
Answer» SOLUTION :Chromosomes appear short and thick during METAPHASE as during this phase of CELL division, they SHOW maximum condensation.

Discussion

928.	Question : When DNA polymerase-III is being activated ?
Answer» When short CHAIN of DNA is FORMED When PRIMER is formed At the time of lagging strand formed At the time of NUCLEOTIDES formed Solution :When primer is formed

Discussion

929.	Question : When DNA molecule is cut by the same restriction enzyme, the resultant DNA fragments have the same kind of 'sticky-ends' and these can be joined together (end to end) using
Answer» E.coli DNA ligase DNA POLYMERASES RESTRICTION ENZYMES ANSWER :B

Discussion

930.	Question : When DNA istranscribedinto mRNA, usually the mRNA remainssingle- standardedbutin somecasesanRNAcanbemade thatis complementaryto themRNA. Thisis called………and its mainfuncion is to ……….. .
Answer» ANTISENSE RNA, blockgene EXPRESSION antisense RNA, amplifymRNA antisense RNA, ENHANCE translation REVERSE transcription, enhance translation Answer :A

Discussion

931.	Question : When did the structure labelled B in the following diagram start to form
Answer» At puberty At the START of the MENSTRUAL cycle before birth In infancy Answer :C

Discussion

932.	Question : When did the earth originate?
Answer» Solution :The EARTH is PRESUMED to have originated about 4.6 BILLION years AGO.

Discussion

933.	Question : When did life come into existence?
Answer» Solution :Life came into EXISTENCE about 3 billion years AGO, from the non-living substances of the primordial EARTH.

Discussion

934.	Question :When did Archaebacteria evolve?
Answer» SOLUTION :3.2 BILLION YEARS BACK

Discussion

935.	Question : When damage of kidney causes accumulation of urea in blood, the condition is known as
Answer» Uremia Polyuria Cystinuria Hematuria Answer :C

Discussion

936.	Question : When conditions become favourable the nucleus of encysted amoeba undergoes multiple division and large number of Amoeba are formed. These are called
Answer» pseudocytospores pseudospores PSEUDOPODIOSPORES PSEUDOPODIA ANSWER :C

Discussion

937.	Question : When CO_2 is added to PEP, the first stable product synthesized is
Answer» PYRUVATE glyceraldehdes - 3 - PHOSPHATE PHOSPHOGLYCERATE oxaloacetate Answer :D

Discussion

938.	Question : When certain numbers of a population reproduce and paas on their genes to the next generation and the allele frequency of the next generations Gene pool are markedly different from those of the previous generation,then it is known as
Answer» non-random mating genetic drift selection Gene flow Answer :C

Discussion

939.	Question : When CO_2 concentration in blood increases breathing becomes
Answer» SHALLOWER and SLOW there is no EFFECT on breathing slow and deep faster and deeper Answer :D

Discussion

940.	Question : When climbing roots penetrate into the cracks of the support, they are called_____roots.
Answer» ANSWER :CLINGING

Discussion

941.	Question : When cells of nucellus in ovule make the embryo directly then it is ?
Answer» Amphimictic Parthenogenetic Both 1 & 2 Apomictic Answer :D

Discussion

942.	Question : When cardiac muscles degenerate into fibrous tissues due to inflammation of the myocardium, the disease is called
Answer» pericarditis endocarditis peritonitis cardiomyopathy Answer :D

Discussion

943.	Question : When cell wall of a bacterial cell is partially and completely removed, protoplasm takes a spherical shape, it is called as
Answer» PROTOPLAST spheroplast bacterioplast DNA ANSWER :B

Discussion

944.	Question : When cell division fails after S - phase (DNA replication) in a diploid cell, the ploidy is
Answer» Haploid Diploid TETRAPLOID Triploid Answer :C

Discussion

945.	Question : When caesarean section/process in essential?
Answer» SOLUTION :When foetus FAILS to come out of UTERUS and vagina normally at the time of PARTURITION, the surgical operation or caesarean SECTION is essential.

Discussion

946.	Question : When carbohydrates are completely oxidized during respiration, what is the RQ and why
Answer» Solution :When carbohydrates are oxidized RQ is I as volume of `CO_(2)` EVOLVED is equal to the volume of `O_(2)` CONSUMED in the respiration process.

Discussion

947.	Question : When C_3 plants allowed to grow O_2 enriched atmosphere ,it leads to
Answer» INCREASE in the NAME of photosynthesis Decrease in RATE of photosynthesis Decrease in Photorespiration Increase in rate of respiration Answer :B

Discussion

948.	Question : When C0_2 concentration in blood increase breathing become .
Answer» SHALLOWER and slow There is no EFFECT on·breathing Slow and deep Faster and deeper Answer :D

Discussion

949.	Question : When both parents are of blood type AB, they can have children with
Answer» A, B, AB and O TYPES A, B and AB BLOOD types A and B blood types A, B and O blood types Solution : A, B and AB blood types

Discussion

950.	Question : When both ovary are removed from rat then which hormone is decreased in blood ?
Answer» Oxytocin Prolactin Estrogen Gonadotrophic RELEASING factor Answer :B

Discussion

Explore topic-wise InterviewSolutions in .

Question : When infected mosquito bites the host human, the larva enter his

Question : When in a typical dihybrid cross in F_(2) generationone monohybrid genotype is present in 12 individual the total number of F_(2) offspring is

Question : When heat raysrelected from Earth, gases like Carbon dioxide, Nitrous oxide do notallow them to escape back tothe spacecausing our planet to heat up. These gases are known as

Question : When heterozygous round seeded plant is crossed with a recessive wrinkle seededplant and round and wrinkle phenotypes will appear in F_1 in the ratio :

Question : When gynoecium matures first it is called ____________ to effect cross pollination .

Question : When gene resemble functional genes, but donot produce functional substance are called

Question : When genomic DNA is fragmented and cloned, the screening of the desired gene is done by using ………. .

Question : When fruit develops from the ovary it is called a false/true fruit.

Question : When fallopian tube of a female is closed or male produces least sperms, then which method is effective?

Question : When fertilization occurs outside of the body of the organisms is called internal fertilization

Question : When examining the TCA cycle, alpha ketoglutarate dehydrogenase complex requires the set of cofactors as which of the following?

Question : When FADH_(2)//FMNH_(2) is oxidised through ETS

Question : When F_1 program shown intermediate phenotype between dominant and recessive phenotypes such as gene interaction is called

Question : When entire inflorescence changes into a fruit it is called _____fruit.

Question : Whendriedraisinsare put in plain water,they swell up. Ifput again in brine solution, they shrivel up. Thisphenomenonindicatesthe property of

Question : When earth fragmented from sun, its temperature was …………...°C.

Question : When does the growth rate of a population following the logistic model equal zero? The logistic model is given as Dn//dt =Rn (1-N//K).

Question : When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1-N/K)

Question : When does the growth rate of a population following the logistic model equal zero ? The logistic model is given as dN/dt = rN(1-N/K)

Question : When does cyclic photophosphorylation take place?

Question : When does capacitation occurs? Define it.

Question : When does a species is categorized as endangered?

Question : When do we have 'World Wild life Week' ?

Question : When do wild animals get extinct in more quantity ?

Question : When do we fill uneasy?

Question :When do couple use the embryo of donor?

Question : When do chromosomes appear short and thick? Why?

Question : When DNA polymerase-III is being activated ?

Question : When DNA molecule is cut by the same restriction enzyme, the resultant DNA fragments have the same kind of 'sticky-ends' and these can be joined together (end to end) using

Question : When DNA istranscribedinto mRNA, usually the mRNA remainssingle- standardedbutin somecasesanRNAcanbemade thatis complementaryto themRNA. Thisis called………and its mainfuncion is to ……….. .

Question : When did the structure labelled B in the following diagram start to form

Question : When did the earth originate?

Question : When did life come into existence?

Question :When did Archaebacteria evolve?

Question : When damage of kidney causes accumulation of urea in blood, the condition is known as

Question : When conditions become favourable the nucleus of encysted amoeba undergoes multiple division and large number of Amoeba are formed. These are called

Question : When CO_2 is added to PEP, the first stable product synthesized is

Question : When certain numbers of a population reproduce and paas on their genes to the next generation and the allele frequency of the next generations Gene pool are markedly different from those of the previous generation,then it is known as

Question : When CO_2 concentration in blood increases breathing becomes

Question : When climbing roots penetrate into the cracks of the support, they are called_____roots.

Question : When cells of nucellus in ovule make the embryo directly then it is ?

Question : When cardiac muscles degenerate into fibrous tissues due to inflammation of the myocardium, the disease is called

Question : When cell wall of a bacterial cell is partially and completely removed, protoplasm takes a spherical shape, it is called as

Question : When cell division fails after S - phase (DNA replication) in a diploid cell, the ploidy is

Question : When caesarean section/process in essential?

Question : When carbohydrates are completely oxidized during respiration, what is the RQ and why

Question : When C_3 plants allowed to grow O_2 enriched atmosphere ,it leads to

Question : When C0_2 concentration in blood increase breathing become .

Question : When both parents are of blood type AB, they can have children with

Question : When both ovary are removed from rat then which hormone is decreased in blood ?