Protein and Nucleic Acid Interactions

Q1: The type II restriction endonucleases, bind to DNA sites

A using H-bonds for specificity

B that are usually palindromic

C using non-sequence-dependent backbone interactions

D all of the above

ANS:D - all of the above

No answer description is available. 

Q2: Different DNA polymerases play distinct roles in DNA replication and repair in both prokaryotic and eukaryotic cells. All known DNA polymerases synthesize DNA only in the __________ by the addition of dNTPs to a performed primer strand of DNA.

A positive direction

B 3' to 5' direction

C 5' to 3' direction

D negative direction

ANS:C - 5' to 3' direction

No answer description is available. 

Q3: The enzyme that joins DNA cuts is called

A joinase

B ligase

C DNA phosphorylase

D reverse transcriptase

ANS:B - ligase

No answer description is available. 

Q4: Which of the following amino acids interact with the DNA or RNA backbone (i.e. phosphate)?

A Ile and Val

B Lys and Arg

C Leu and Ala

D Cys and Met

ANS:B - Lys and Arg

No answer description is available. 

Q5: Cleavage of DNA by EcoRI endonuclease results in the formation of

A two 3'-OH ends and two 5'-phosphate ends

B one 3'-OH end and one 5'-phosphate end

C two 3'-phosphate ends and two 3'-OH ends

D one 3'-OH end and two 5'-phosphate end

ANS:A - two 3'-OH ends and two 5'-phosphate ends

No answer description is available. 

Q6: Reverse transcripase from HIV does not

A uses RNA as a template

B has a 5' to 3' polymerase activity

C has a 3'- 5' exonuclease activity

D requires a primer

ANS:C - has a 3'- 5' exonuclease activity

No answer description is available. 

Q7: Which of the following amino acids can interact with the DNA or RNA nucleotide bases via hydrogen bonding?

A Asn and Gln

B Cys and Met

C Lys and Leu

D Ile and Val

ANS:A - Asn and Gln

No answer description is available. 



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.