24277 + Interview Questions in Biology in Class 12 Page 308 InterviewSolution

15351.	Question : Expand the abbreviation WWW.
Answer»

Discussion

15352.	Question : In Scratch which blocks are orange?
Answer» Variables Control Sensing Motion Answer :A

Discussion

15353.	Question : In Schistosoma female is present in ___of male
Answer» Laurer's canal Gynaecophoric canal Mehlis's gland Both (1) & (2) ANSWER :B

Discussion

15354.	Question : In scapigerous umbel,flowers are arranged in which manner :-
Answer» Corymb Catkin Panicle Monochasial cyme Answer :D

Discussion

15355.	Question : _____in saliva helps in lubrication and adhering the masticated food particles into a_____
Answer» ANSWER :MUCUS, BOLUS

Discussion

15356.	Question : In saltatory conduction of impulse
Answer» time is conserved energy is conserved both (1) and (2) EITHER time nor energy is conserved Answer :C

Discussion

15357.	Question : In roots, the arrangement of xylem and vascular bundies is _ and_ respectively
Answer» ENDARCH, RADIAL Endarch, conjoint Exarch, radial Exarch, conjoint Answer :C

Discussion

15358.	Question : In roots, the primary xylem is called exarch. because -
Answer» The PROTOXYLEM lies towards the CENTRE and the METAXYLEM lies towards the PERIPHERY The protoxylem lies towards the periphery and the metaxylem lies towards the centre Both the protoxylem and the metaxylem lies towards the centre The protoxylem is SURROUNDED by the metaxylem. Answer :B

Discussion

15359.	Question : In rotifers, the type of reproduction responsible for the organisms to multiply isapomixisparthenogenesisasexual reproductionsexual reproduction
Answer» apomixis parthenogenesis asexual reproduction sexual reproduction Answer :C

Discussion

15360.	Question : In rocky Intertidal communities removal of which of the following predator became the cause of extinction of 10 species of invertebrates?
Answer» ABINGDON tortoise Monarch butterfly Pisaster starfish Calotropis Answer :C

Discussion

15361.	Question : In root nodules of legumes, leg-haemoglobin is important because:
Answer» It TRANSPORTS oxygen to the ROOT nodule It acts as an oxygen scavenger It PROVIDES energy'to the nitrogen fixing bacterium It acts as a CATALYST in transamination Answer :B

Discussion

15362.	Question : In RNAi, genes are silenced using:
Answer» ssDNA dsDNA dsRNA ssRNA Answer :C

Discussion

15363.	Question : In RNAi, genes are silenced using
Answer» ssDNA dsDNA dsRNA ssRNA Solution :RNAi takes place in all eukaryotic organisms as a METHOD of CELLULAR defense. This method inolves silencinf of a specific mRNA due to a complementary dsRNA molecule that binds to and prevents translation of mRNA (SILENCING). The source of this complementary RNA COULD be from an infection by viruses having RNA genomes or mobile genetic elements (transposons) that replicate VIA an RNA intermediate.

Discussion

15364.	Question : In RNAi, genes are silenced using(A) ssDNA(B) dsDNA(C) dsRNA(D) ssRNA
Answer» ssDNA ds DNA dsRNA ssRNA Solution :RNAi takes PLACE in all eukaryotic ORGANISMS as a mode of cellular defence. This method involves silencing of a specific MRNA due to the COMPLEMENTARY dsRNA molecule. This binds to and prevents translation of the mRNA (silencing).

Discussion

15365.	Question :In 'Rivet popper hypothesis', wing rivets of an aeroplane are compared with :-
Answer» DOMINANT species Critical LINK species Rare species Keysotne species ANSWER :D

Discussion

15366.	Question : In RNA the source of complementary RNAcould be from an infection by viruses having RNA genomes or Mobile genetic elements (transposons) that form complementary RNA replicate via an_________ .
Answer» ANSWER :RNA INTERMEDIATE

Discussion

15367.	Question : In RNA interference (RNAi) :
Answer» The silencing of a SPECIFIC mRNA due to a COMPLEMENTARY RNA strand that binds and form dsRNA molecule and prevent translation of the mRNA The silencing of a specific mRNA due to dsDNA molecule that binds to and prevent translation of the mRNA The silencing of a specific mRNA due to a non - complementary dsRNA molecule that binds to and prevent translation of the mRNA All of the above Answer :A

Discussion

15368.	Question : In "rivet popper hypothesis" rivet indicates?
Answer» Community Biosphere Ecosystem Species Answer :D

Discussion

15369.	Question : In Rhizopus , sporesare producedinside _____.
Answer» SOLUTION :SPORANGIUM

Discussion

15370.	Question : In respiration, pyruvic acid is
Answer» Broken down into a two-carbon fragment and carbon dioxide A RESULT of protein breakdown Formed only when OXYGEN is available One of the product of KREBS CYCLE Answer :A

Discussion

15371.	Question : In reproductive fitness of a population in a certain habitat is also termed as ......
Answer» Verhulst's FITNESS DARWIN's fitness Lamarkian fitness HUXLEY's fitness ANSWER :B

Discussion

15372.	Question : In replication ______ removes the twists formed during the unwinding process.
Answer» SOLUTION :TOPOISOMERASE

Discussion

15373.	Question : In respiration 180 gm of glucose with 192 gm of oxygen produces:
Answer» 108 gm of WATER, 264 gm of `CO_2` , 686 kcal of energy 100 gm of water, 384gm of `CO_2` , 686 kcal of energy 348 gm of water, 108 gm of `CO_2` , 686 kcal of energy 108 gm of water 348 gm of `CO_2` , 868 Answer :A

Discussion

15374.	Question :In regulation of gene expression in prokaryotesI. Lactose acts as the suppressor for gene expression II. Tryptophan acts as the inducer for gene expressionIII. Regulator gene is the one that produces the repressor molecule
Answer» I ALONE correct b II alone correct III alone correct II and I arc correct ANSWER :C

Discussion

15375.	Question : In reductive amination, the product is
Answer» `ALPHA`-ketoglutaric acid glutamine glutamate alanine Answer :C

Discussion

15376.	Question : In recombinant DNA technology,vectors are used to transfer a gene of interest in he host cells.Mention any three features of vectors that are most suitable for this purpose.
Answer» SOLUTION :(i) Have ORIGIN of replication(Ori) (II) a SELECTABLE marker at least one recognition SITE.

Discussion

15377.	Question : In recombinant DNA technology, a plasmid vector must be cleaved by
Answer» Four SEPARATED enzymes MODIFIED DNA ligase A heated ALKALINE SOLUTION the same ENZYME that cleaves the donor gene Answer :D

Discussion

15378.	Question : In recent years,nucleotidesequence of DNA and Y-chromosome were considered for the study of human evolution, because
Answer» Their STRUCTUREIS KNOWN in greater detail They can be studied from the samples of fossil remains They are small and therfore easy to study They are uniparental in ORIGIN and do not take PART in recombination Answer :D

Discussion

15379.	Question : In recombinant DNA technique, the term vector refers to
Answer» Donor DNA, is identified and picked up through electrophoresis Plasmid, transfers DNA into living cell COLLECTION of ENTIRE GENOME in the form of plasmid Enzyme, cuts the DNA at SPECIFIC sites Answer :B

Discussion

15380.	Question : In recombinant DNA technique the term vector refers to
Answer» Plasmid that can CUT DNA at SPECIFIC base sequence Plasmid that can transfer the foreign DNA into a living cell Enzyme that can join the different DNA fragments All of the above. Answer :B

Discussion

15381.	Question : In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y-chromosomes were considered for the study of human evolution, because
Answer» they can be studied from the samples of FOSSIL remains they are small and therefore, easy to study they are uniparental in ORIGIN and do not take part in recombination their structure is known in GREATER detail. Solution :they are uniparental in origin and do not take part in recombination

Discussion

15382.	Question : In recent years, DNA sequences (nucleotide sequence) of mt-DNA and V-chromosomes were considered for the study of human evolution, because
Answer» they can be studied from the samples of fossil remains they are SMALL and therefore, easy to study they are uniparental in origin and do not take PART in recombination their structure is KNOWN in greater DETAIL. Solution :they are uniparental in origin and do not take part in recombination

Discussion

15383.	Question : In reabsorption process in humans,.. A... and ...B… are reabsorbed through active transport. Glucose and amino acids are reabsorbed through...C... transport. Simple diffusion is used for ...D… Fill in the blanks with appropriate options.
Answer» `A CI^(-), "B-water"`, C-usmosis, D-urea `A-Na^(+), B-K^(+)`, C-passive, `D-Cl^(-)` `A-K^(+), B-CI^(-)`, C-active, `D-Na^(+)` A-urea, `B-CI^(-)`, C-osmosis, `D-K^(+)` ANSWER :B

Discussion

15384.	Question : In recent years , DNA sequence (nucleotide sequence ) of mt-DNA and Y chromosomes were considered for the study of human evolution because :
Answer» They can be studied from the samples of FOSSIL remains They are SMALL and therefore EASY to study They are uniparental in origin and do not take part in recombination Their structure is known in greater detail Answer :D

Discussion

15385.	Question : In Racemose, Flowers are arranged in -
Answer» ACROPETAL SUCCESSION Centrifugal order Centripetal order All Answer :A

Discussion

15386.	Question : In rabbit, two recessive genes produce a solid body colour and long hair in contrast to dominant spotted body colour and short hair. The result of a cross between heterozygous spotted short haired rabbit to solid long haired rabbir gives spotted, short haired 48, spotted long haired 5, solid short haired 7, solid long haired 40, total 100. In terms of cross over units, how far are there two genes on the chromosome?
Answer» 40 MAP UNITS 7 units 12 map units 45 map units Answer :C

Discussion

15387.	Question : In pulses , proteins are stored in
Answer» ENDOSPERM COTYLEDONS PERICARP SEED coat Answer :B

Discussion

15388.	Question : In purple and green suphur bacteria, the 'oxidation' product is
Answer» sulphur suphate `OUNDERSET(2)` MAY be both (1) and (2) ANSWER :D

Discussion

15389.	Question : In pulmonary capillaries, there is definite exchange of ions between RBC and plasma. Removal of CO_2 from the blood involves
Answer» INFLUX of `HCO_3`IONS into RBC Influx of `Cl^-` into RBC Efflux of `H^+` ions from RBC Efflux of `HCO_3^+`ions from RBC Answer :A

Discussion

15390.	Question : In pteridophytes, prothallus produces :
Answer» sporangia antheridia and archaegonia vascular tissues root, STEM and leaf Answer :B

Discussion

15391.	Question : In PS-II the reaction centre chl-a has an absorption peak at (i) wavelength of (ii) causing electrons to become excited
Answer» (i) 400nm, (ii) RED light (i) 680NM, (ii) Red light (i) 700NM, (ii) Red light (i) 700nm, (ii) BLUE light Answer :B

Discussion

15392.	Question : In pRous sacroma virus, the flow of information is form
Answer» DNA `RARR` RNA `rarr` Proteins RNA `rarr` RNA `rarr` Proteins RNA `rarr` DNA `rarr` RNA `rarr` Proteins RNA `rarr` DNA `rarr` Proteins Answer :C

Discussion

15393.	Question :In PS II, first known electron acceptor is
Answer» CYTOCHROME PQ FAS Pheophytin Answer :D

Discussion

15394.	Question : In protozoa, locomotory structures are absent in the class
Answer» Rhizopoda Ciliata Sporozoa Flagellata Answer :C

Discussion

15395.	Question : In prokaryotic a during initiation of translation, GTP is essential in ....................
Answer» the attachment of 505 subunit of RIBOSOME to initiation COMPLEX. PRODUCTION of fomyl methio t-RNA the attachment of 305 subunit of ribosomes to m-RNA the attachment of 305 m-RNA to fomyl methio t-RNA. Solution :the attachment of 305 m-RNA to fomyl methio t-RNA.

Discussion

15396.	Question : In prokaryotes, the function of cholesterol in plasma membrane is taken over by
Answer» glycoproteins hopanoides fatty acids glycerol Answer :B

Discussion

15397.	Question : In prokaryotes, ……….. DNA is present.
Answer» linear single stranded circular large Answer :C

Discussion

15398.	Question : In prokaryotes, DNA is found in ____cytoplasm in which is maintained by_____
Answer» SCATTERED, ACIDIC protein Super COILED STAGE, Polyamines Non-scattered stage, Histone Coiled stage, Acidic protein Answer :B

Discussion

15399.	Question : In prokaryotes (bacteria), transcription and translation are coupled process. Give reason.
Answer» SOLUTION :In BACTERIA, SINCE there is no separation of genetic material (nucleoid) from cytosol, transcription and translation occurs simultaneously and many times translation can being MUCH before the mRNA is FULLY transcribed.

Discussion

15400.	Question : In progeny of dihybrid cross in F_2 generation how many plants are homozygous recessive ?
Answer» ONE TWO THREE FOUR SOLUTION :One

Discussion

Explore topic-wise InterviewSolutions in .

Question : Expand the abbreviation WWW.

Question : In Scratch which blocks are orange?

Question : In Schistosoma female is present in ___of male

Question : In scapigerous umbel,flowers are arranged in which manner :-

Question : _____in saliva helps in lubrication and adhering the masticated food particles into a_____

Question : In saltatory conduction of impulse

Question : In roots, the arrangement of xylem and vascular bundies is _ and_ respectively

Question : In roots, the primary xylem is called exarch. because -

Question : In rotifers, the type of reproduction responsible for the organisms to multiply isapomixisparthenogenesisasexual reproductionsexual reproduction

Question : In rocky Intertidal communities removal of which of the following predator became the cause of extinction of 10 species of invertebrates?

Question : In root nodules of legumes, leg-haemoglobin is important because:

Question : In RNAi, genes are silenced using:

Question : In RNAi, genes are silenced using

Question : In RNAi, genes are silenced using(A) ssDNA(B) dsDNA(C) dsRNA(D) ssRNA

Question :In 'Rivet popper hypothesis', wing rivets of an aeroplane are compared with :-

Question : In RNA the source of complementary RNAcould be from an infection by viruses having RNA genomes or Mobile genetic elements (transposons) that form complementary RNA replicate via an_________ .

Question : In RNA interference (RNAi) :

Question : In "rivet popper hypothesis" rivet indicates?

Question : In Rhizopus , sporesare producedinside _____.

Question : In respiration, pyruvic acid is

Question : In reproductive fitness of a population in a certain habitat is also termed as ......

Question : In replication ______ removes the twists formed during the unwinding process.

Question : In respiration 180 gm of glucose with 192 gm of oxygen produces:

Question :In regulation of gene expression in prokaryotesI. Lactose acts as the suppressor for gene expression II. Tryptophan acts as the inducer for gene expressionIII. Regulator gene is the one that produces the repressor molecule

Question : In reductive amination, the product is

Question : In recombinant DNA technology,vectors are used to transfer a gene of interest in he host cells.Mention any three features of vectors that are most suitable for this purpose.

Question : In recombinant DNA technology, a plasmid vector must be cleaved by

Question : In recent years,nucleotidesequence of DNA and Y-chromosome were considered for the study of human evolution, because

Question : In recombinant DNA technique, the term vector refers to

Question : In recombinant DNA technique the term vector refers to

Question : In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y-chromosomes were considered for the study of human evolution, because

Question : In recent years, DNA sequences (nucleotide sequence) of mt-DNA and V-chromosomes were considered for the study of human evolution, because

Question : In reabsorption process in humans,.. A... and ...B… are reabsorbed through active transport. Glucose and amino acids are reabsorbed through...C... transport. Simple diffusion is used for ...D… Fill in the blanks with appropriate options.

Question : In recent years , DNA sequence (nucleotide sequence ) of mt-DNA and Y chromosomes were considered for the study of human evolution because :

Question : In Racemose, Flowers are arranged in -

Question : In pulses , proteins are stored in

Question : In purple and green suphur bacteria, the 'oxidation' product is

Question : In pulmonary capillaries, there is definite exchange of ions between RBC and plasma. Removal of CO_2 from the blood involves

Question : In pteridophytes, prothallus produces :

Question : In PS-II the reaction centre chl-a has an absorption peak at (i) wavelength of (ii) causing electrons to become excited

Question : In pRous sacroma virus, the flow of information is form

Question :In PS II, first known electron acceptor is

Question : In protozoa, locomotory structures are absent in the class

Question : In prokaryotic a during initiation of translation, GTP is essential in ....................

Question : In prokaryotes, the function of cholesterol in plasma membrane is taken over by

Question : In prokaryotes, ……….. DNA is present.

Question : In prokaryotes, DNA is found in ____cytoplasm in which is maintained by_____

Question : In prokaryotes (bacteria), transcription and translation are coupled process. Give reason.

Question : In progeny of dihybrid cross in F_2 generation how many plants are homozygous recessive ?

Question : _in saliva helps in lubrication and adhering the masticated food particles into a_

Question : In prokaryotes, DNA is found in cytoplasm in which is maintained by_