14. Which mutant would have a mutation in the "strong" promoter?
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5

10. What percent of labeled cells are in M phase at 4 hours after exposure to labeled thymidine? (A) 100 (B) 33 (C) 20 (D) 6 (E) 0

11. If the length of G2 were increased by one hour, which of the following statements would be true regarding the slope of the line from the point of the first appearance of labeled mitotic cells to the first point at which all the mitotic cells were labeled? (A) It would stay the same. (B) It would decrease. (C) It would increase. (D) It would switch from a positive to a negative slope. (E) No conclusion regarding the slope of the line can be drawn.

12. The expected frequency of the triple CCC in the A: C=1:5 copolymer should be (A) 1/8 (B) 5/6 (C) 7/8 (D) 15/216 (E) 125/216

13. Which of the following amino acid(s) appear to be coded by triplets containing 2 A's and 1 C? (A) Asparagine (B) Glutamine (C) Proline (D) Threonine (E) Lysine 

15. Which mutant(s) would have a mutation in the repressor? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

16. Which mutant(s) would have a mutation in the operator? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

17. Which mutant(s) would have a mutation in the protein coding region? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5 

18. Which element(s) are cis-acting? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

19. Which element(s) are trans-acting? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

20. Which element is the repressor? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5