24277 + Interview Questions in Biology in Class 12 Page 352 InterviewSolution

17551.	Question : DNA is the better genetic material than RNA. Justify थे statement with three comparative reasons.
Answer» Solution :(a) Structurally and chemically DNA is more stable than RNA. (b) DNA MUTATE slow, but RNA mutate fast. (C) 2-OH GROUP present in RNA is a reactive group and MAKES RNA labile and easily degradable. (d) DNA is less reactive than RNA. (e) Presence of thymine at the place of uracil give additional stability to DNA.

Discussion

17552.	Question : DNA is not present in
Answer» Ribosomes Nucleus Mitochondria CHLOROPLAST ANSWER :A

Discussion

17553.	Question : DNA is generally methylated at
Answer» A-base G-base T-base C-base Answer :D

Discussion

17554.	Question : DNA is better genetic material than RNA, because:-
Answer» DNA is chemically less reactive and structurally more STABLE as compared to RNA Presence of thymine at the PLACE of URACIL provides additional stability to DNA DNA being stable, so mutate at a SLOW rate All the above Answer :D

Discussion

17555.	Question : DNA is a polymer of nucleotides which are linked to each other by 3' - 5' phosphodiester bond . To prevent polymerisation of nucleotides , which of the following modifications would you choose ?
Answer» Replace PURINE with pyrimidines Remove / Replace 3' OH group in deoxyribose Remove / Replace 2' OH group with some other in deoxyribose Both ( B ) and ( C ) ANSWER :D

Discussion

17556.	Question : DNA is a polymer of nucleotides which are linked to each other by 3'-5' phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose ?
Answer» Replace purine with pyrimidines Remove/Replace 3' OH group in deoxy ribose Remove/Replace 2' OH group with some other group in deoxy ribose Both (B) and (C) Solution :Remove/Replace 3. OH group in deoxy ribose DNA is a polymer of NUCLEOTIDES which are LINKED to each other by 3.-5. phosphodiester bond. Remove/replace 3.OH group in deoxyribose, to PREVENT polymerisation of nucleotides.

Discussion

17557.	Question : DNA is a polymer of nucleotides which are linked to each other by 3' - 5' phosphodiester bond. To prevent polymerisation of nucle- otides, which of the following modifications would you choose
Answer» Replace PURINES with pyrimidines Remove/Replace 3' OH group in deoxyribose Remove / Replace 2' OH group with some other group in deoxyribose Both (B) and © Answer :b

Discussion

17558.	Question : DNA is a negatively charged molecule, hence it moves towards the
Answer» CATHODE ANODE EQUATOR all of these ANSWER :B

Discussion

17559.	Question : DNA is a hydrophilic molecule, so it cannot pass through cell membranes. Then how does a recombinant DNA inserted into a plasmid vector, enter into a bacterial cell ?
Answer» Solution :This is done by treating them with a specific concentration of a divalent cation such as calium, which increases the EFFICIENCY with efficiency with which DNA enters the bacterium through pores in its cell WALL. Recombinant DNA canbe then forced into such cells by incubating the cells with recombinant DNA on ice, FOLLOWED by placing them briefly at `42^(@) C` and then putting them back on ice. This enables the BACTERIA to take up the recombinantDNA .

Discussion

17560.	Question : DNA is a hydrophilic molecule, it cannot pass through cell membrane. In order to force bacteria to take up the plasmid, the bacterial cells must be made competent to take up DNA. Write the procedure for making the cell competent?
Answer» Solution :Treating host with a specific CONCENTRATION of a divalent cation such as calcium. Which increases the EFFICIENCY with which DNA enters the bacterium through pores in its CELL wall. Recombinant DNA can then be forced into such cells by incubating the cells with recombinant DNA on ice followed by placing them briefly at `42^@`C (heat shock). Then PUTTING them back on ice. this ENABLES the bacteria to take up the recombinant DNA.

Discussion

17561.	Question : DNA is
Answer» Cestrum Cucumber Potato Radish. Answer :B

Discussion

17562.	Question : DNA in eukaryotes is a double helix and:
Answer» COMPLEMENTARY and parallel complementary and ANTIPARALLEL WITHOUT SUPERCOILS always circular Answer :B

Discussion

17563.	Question : DNA fungerprinting rfers to :-
Answer» Techniques used for indentification of FINGERPRINTS of individuals MOLECULAR analysis of profiles of DNA SAMPLES Anylsis of DNA samles using imprinting DEVICES Techinques used for molecular analysis of different specimens of DNA Answer :B

Discussion

17564.	Question : DNA-Gyrase enzyme, that participates in the process of DNA-replication is a type of :-
Answer» DNA ligase DNA topoisomerase Reverse transcriptase DNA polymerase Answer :B

Discussion

17565.	Question : DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by
Answer» CENTRIFUGATION POLYMERASE CHAIN reaction electrophoresis restriction mapping Solution :electrophoresis

Discussion

17566.	Question : DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by :
Answer» POLYMERASE CHAIN reaction Electrophoresis Restriction mapping Centrifugation Answer :A

Discussion

17567.	Question : DNA fragments can be separated and detected using_____.
Answer» ANSWER :ELECTROPHORESIS

Discussion

17568.	Question : DNA fragments are joined in a correct sequence by
Answer» DNA POLYMERASE I DNA ligase RNA polymerase Helicase Answer :A

Discussion

17569.	Question : DNA fragments are :
Answer» NEGATIVELY charged Nertral Positively charged Positively or negatively charged Answer :A

Discussion

17570.	Question : DNA fingerprinting technique was discovered by
Answer» Wilmut Jefferys Eithoven Kary Mullis Answer :B

Discussion

17571.	Question : DNA fragment containing gene of interset to be cloned _______
Answer» SOLUTION :N/A

Discussion

17572.	Question : DNA fingerprinting technique was first developed by :
Answer» Jeffreys, WILSON and Thein Schleiden andSchwann Edward and Steptoe Boysen and Jensen Answer :A

Discussion

17573.	Question : DNA fingerprinting is used for patenity testing.
Answer» Solution :REASON:DNA patermity TESTING is the USE of DNA biplogically PARENT of the child in the case opf a disputes.

Discussion

17574.	Question :DNA fingerprinting refers to(A) Molecular analysis of profiles of DNA samples(B) Analysis of DNA samples using imprinting device(C) Technique used for molecular analysis of different specimens of DNA(D) Techniques used for identification of fingerprints of individuals
Answer» MOLECULAR analysis of profiles of DNA samples Analysis of DNA samples USING IMPRINTING device Technique used for molecular analysis of different specimens of DNA Techniques used for identification of fingerprints of individuals Solution :Molecular analysis of profiles of DNA samples

Discussion

17575.	Question : DNA fingerprinting method is very useful for
Answer» DNA tests for IDENTITY and relationships FORENSIC studies Polymorphism All of the above Answer :D

Discussion

17576.	Question : DNA fingerprinting is related to :
Answer» MOLECULAR ANALYSIS of profiles of DNA SAMPLES Analysis of DNA samples using imprinting devices Techniques used for molecular analysis of different specimens of DNA Techniques used in indentification of FINGERPRINTS of different persons Answer :A

Discussion

17577.	Question : DNA fingerprint is associated with …………………
Answer» to molecular ANALYSIS of DNA prints or IMAGES. to analysis tech. for DNA printing. for different DNA model by molecular analysis tech. for individual fingerprint. SOLUTION :to molecular analysis of DNA prints or images.

Discussion

17578.	Question : DNA finger printing was invented by :-
Answer» KARY Mullis Alec Jeffery Dr. PAUL Berg Francis Collins' Answer :B

Discussion

17579.	Question :DNA finger printing technique is based on
Answer» RESTRICTION endonuclease polymorphism in REPETITIVE DNA Gel electrophoresis Southern BLOTTING technique Answer :B

Discussion

17580.	Question : DNA finger printing is useful in
Answer» Taxonomical APPLICATIONS PEDIGREE analysis Anthropological studies All the THREE ANSWER :D

Discussion

17581.	Question : DNA finger printing refers to :
Answer» Molecular ANALYSIS of profiles of DNA samples Analysis of DNA samples using imprinting device Techniques USED for molecular analysis of DIFFERENT specimens of DNA' Techniques used for identification of finger PRINTS of individuals Answer :A

Discussion

17582.	Question : DNA finger printing involves
Answer» IDENTIFICATION of differences in all REGIONS of DNA sequence Identification of differences in some SPECIFIC regions in DNA sequence Identification of similarities in any region of DNA sequence NONE of these Answer :B

Discussion

17583.	Question : DNA finger printing is the basis of peternity testing in case of disputes. Why ?
Answer» SOLUTION :GENETIC POLYMORPHISMS are INHERITABLE from peresents to CHILDREN.

Discussion

17584.	Question : DNA finger printing has application in the field of
Answer» FORENSIC science Genetic Biodiversity Evolutionary biology Answer :D

Discussion

17585.	Question : DNA finger printing involves the use of
Answer» CDNA MRNA r-RNA t-RNA ANSWER :A

Discussion

17586.	Question : DNA finger print profile will be exactly same of :
Answer» Siblings Offsprings IDENTICAL twins Fraternal twins Answer :C

Discussion

17587.	Question : DNA element with ability to change positions is called
Answer» Cistron TRANSPOSON Intron Recon ANSWER :B

Discussion

17588.	Question : DNA element with ability to change its position is called :
Answer» CISTRON TRANSPOSON INTRON Recon Solution :Transposon

Discussion

17589.	Question : DNA duplication takes place during :
Answer» only in S phase entire interphase only in `G_1` phase Only in `G_2` phase Answer :A

Discussion

17590.	Question : DNA-dependent RNA polymerase catalyses transcription on one strand of the DNA which is called the
Answer» TEMPLATE STRAND CODING strand alpha strand anti strand SOLUTION :template strand

Discussion

17591.	Question : DNA dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the
Answer» ALPHA strand ANTI strand Template strand CODING strand ANSWER :C

Discussion

17592.	Question : DNA content in a meiocyte at G_2 phase is 40 pg. What would be the DNA content after meiosis-II in the daughter cells?
Answer» 20 pg 5 pg 10 pg 15 pg Answer :C

Discussion

17593.	Question : DNA dependent DNA polymerases catalyse polymerization of DNA in
Answer» Only 3. `to`5. direction Only 5. `to`3.direction Both direction Irregular directions Answer :B

Discussion

17594.	Question : DNA contains nucleobasės , sugars and phosphate . Removal of which among these from a DNA sample will not significantly affect the length of DNA ?
Answer» NUCLEOBASES SUGAR PHOSPHATE NONE of these Answer :A

Discussion

17595.	Question : DNA contains nucleobases, sugar and phosphate. Removal of which among these from a DNA sample will not significantly affect the length of DNA?
Answer» Nucleobases Sugar Phosphate None of these ANSWER :A

Discussion

17596.	Question : DNA caused the Discuss the significance of heavy isotope of nitrogen in the Meselson and Stahl's experiment.
Answer» Solution :Matthew Meselson and Franklin Stahl performed the following experiment in 1958. They grew E. coli in a medium CONTAINING `""^(15)NH4Cl (""^(15)N)` is the heavy isotope of nitrogen) as the only nitrogen source for many generations. The result was that `""^(15)N` was incorporated into NEWLY synthesised DNA (as WELL as other nitrogen containing compounds). This heavy DNA molecule could be distinguished from the normal DNA by CENTRIFUGATION in a cesium chloride (CSCI) density gradient `""^(15)N` is not a radioactive isotope, and it can be separated from `""^(14)N` only based on densities).

Discussion

17597.	Question : DNA can be cut with the help of
Answer» DNAase RNAase KNIFE Restriction ENZYME SOLUTION :Restriction enzyme

Discussion

17598.	Question : DNA as an acidic substance present in nucleus was first identified by ______ in 1869, he namedit as _________
Answer» Meischer , nuclein Watson and CRICK , DNA Chargaff, nuclein Wilkins and FRANKLIN, DOUBLE helix Solution :(a)

Discussion

17599.	Question : DNA and RNA differ in:
Answer» SUGAR only sugar and phosphate sugar and purine sugar and pyrimidine Answer :D

Discussion

17600.	Question :DNA and RNA differ by
Answer» N - BASES and PHOSPHATE groups Number of C - ATOMS in sugars N - bases and sugars Sugar and phosphate groups Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : DNA is the better genetic material than RNA. Justify थे statement with three comparative reasons.

Question : DNA is not present in

Question : DNA is generally methylated at

Question : DNA is better genetic material than RNA, because:-

Question : DNA is a polymer of nucleotides which are linked to each other by 3' - 5' phosphodiester bond . To prevent polymerisation of nucleotides , which of the following modifications would you choose ?

Question : DNA is a polymer of nucleotides which are linked to each other by 3'-5' phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose ?

Question : DNA is a polymer of nucleotides which are linked to each other by 3' - 5' phosphodiester bond. To prevent polymerisation of nucle- otides, which of the following modifications would you choose

Question : DNA is a negatively charged molecule, hence it moves towards the

Question : DNA is a hydrophilic molecule, so it cannot pass through cell membranes. Then how does a recombinant DNA inserted into a plasmid vector, enter into a bacterial cell ?

Question : DNA is a hydrophilic molecule, it cannot pass through cell membrane. In order to force bacteria to take up the plasmid, the bacterial cells must be made competent to take up DNA. Write the procedure for making the cell competent?

Question : DNA is

Question : DNA in eukaryotes is a double helix and:

Question : DNA fungerprinting rfers to :-

Question : DNA-Gyrase enzyme, that participates in the process of DNA-replication is a type of :-

Question : DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by

Question : DNA fragments generated by the restriction endonucleases in a chemical reaction can be separated by :

Question : DNA fragments can be separated and detected using_____.

Question : DNA fragments are joined in a correct sequence by

Question : DNA fragments are :

Question : DNA fingerprinting technique was discovered by

Question : DNA fragment containing gene of interset to be cloned _______

Question : DNA fingerprinting technique was first developed by :

Question : DNA fingerprinting is used for patenity testing.

Question :DNA fingerprinting refers to(A) Molecular analysis of profiles of DNA samples(B) Analysis of DNA samples using imprinting device(C) Technique used for molecular analysis of different specimens of DNA(D) Techniques used for identification of fingerprints of individuals

Question : DNA fingerprinting method is very useful for

Question : DNA fingerprinting is related to :

Question : DNA fingerprint is associated with …………………

Question : DNA finger printing was invented by :-

Question :DNA finger printing technique is based on

Question : DNA finger printing is useful in

Question : DNA finger printing refers to :

Question : DNA finger printing involves

Question : DNA finger printing is the basis of peternity testing in case of disputes. Why ?

Question : DNA finger printing has application in the field of

Question : DNA finger printing involves the use of

Question : DNA finger print profile will be exactly same of :

Question : DNA element with ability to change positions is called

Question : DNA element with ability to change its position is called :

Question : DNA duplication takes place during :

Question : DNA-dependent RNA polymerase catalyses transcription on one strand of the DNA which is called the

Question : DNA dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the

Question : DNA content in a meiocyte at G_2 phase is 40 pg. What would be the DNA content after meiosis-II in the daughter cells?

Question : DNA dependent DNA polymerases catalyse polymerization of DNA in

Question : DNA contains nucleobasės , sugars and phosphate . Removal of which among these from a DNA sample will not significantly affect the length of DNA ?

Question : DNA contains nucleobases, sugar and phosphate. Removal of which among these from a DNA sample will not significantly affect the length of DNA?

Question : DNA caused the Discuss the significance of heavy isotope of nitrogen in the Meselson and Stahl's experiment.

Question : DNA can be cut with the help of

Question : DNA as an acidic substance present in nucleus was first identified by ______ in 1869, he namedit as _________

Question : DNA and RNA differ in:

Question :DNA and RNA differ by

Question : DNA as an acidic substance present in nucleus was first identified by in 1869, he namedit as ___