Course

Biochemistry

Study Pack

Set 11 Structure Of Nucleic Acids

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Question 1

(Multiple Choice)

Free
Which of the following enzymes introduces negative supercoils into DNA?

A) DNA polymerase
B) DNA gyrase
C) DNA ligase
D) primase
E) DNA photolyase

Answer

Question 2

(Multiple Choice)

Free
The function of DNA topoisomerases is:

A) packaging DNA into nucleosomes.
B) forming cruciform DNA.
C) unwinding G:C rich areas in DNA.
D) breaking one or more strands of DNA, winding them tighter or looser, and rejoining the ends.
E) promoting DNA hybridization.

Answer

Question 3

(Multiple Choice)

Free
How is a fluorescent tag that is unique for each nucleotide incorporated into the newly synthesized DNA using the chain termination protocol for DNA sequencing?

A) Each of the ddNTPs is labeled with a specific fluorophore
B) The primer strand is labeled with a specific fluorophore
C) The template strand is labeled prior to the experiment with complimentary fluorophores
D) The 5'-end is labeled with a fluorophore.
E) All dNTPs are labeled with a fluorophore

Answer