DNA Structure and Replication – Section 2

11. Reverse transcriptase produces

A. DNA from peptides
B. RNA from DNA
C. RNA from RNA
D. DNA from RNA

Correct Answer: D. DNA from RNA

12. The nicks or gaps between Okazaki fragments are eventually sealed by

A. gyrase
B. DNA ligase
C. RNA ligase
D. polymerase

Correct Answer: B. DNA ligase

13. Nucleosome is

A. an octamer of four histones with H1 protein
B. an hexamer of three histones with H1 protein
C. an hexamer of three histones without H1 protein
D. an octamer of four histones without H1 protein

Correct Answer: D. an octamer of four histones without H1 protein

14. The DNA polymerase in bacteria, responsible for DNA synthesis is

A. Polymerase I
B. Polymerase II
C. Polymerase III
D. all of these

Correct Answer: C. Polymerase III

15. In a typical electrophoresis experiment, larger fragments of DNA move more

A. slowly, so they appear nearer the top of a gel photograph
B. quickly, so they appear nearer the top of a gel photograph
C. slowly, so they appear nearer the bottom of a gel photograph
D. quickly, so they appear nearer the bottom of a gel photograph

Correct Answer: A. slowly, so they appear nearer the top of a gel photograph

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