1. Which of the following is not a structural motif in DNA binding proteins?

A. bZIP
B. helix-turn-helix
C. TFIID
D. zinc finger

2. DNA with a G-C content of 50% will melt at approximately

A. 60°C
B. 70 °C
C. 90 °C
D. 100 °C

3. Who’s X-ray work aided Watson and Crick in their discovery of the double helix?

A. W.H. Bragg
B. R. Franklin
C. L. Pauling
D. Leaderberg

4. DNA replication in eukaryotes occurs only in

A. G1 phase
B. S phase
C. G2 phase
D. M phase

5. Which polymerase is active in DNA repairing

A. Polymerase I
B. Polymerase II
C. Polymerase III
D. none of these