8. Which of the following conditions can fully turn on the Lac operon in Escherichia coli?(A)Low glucose and lactose levels;(B)Low glucose but high lactose levels;(C)High glucose and lactose levels;(D)Low cAMP and high glucose levels.

9. Your Biology teacher gives you two human cell lines, A and B, which are in G₀ and G₁ phases of the cell cycle, respectively. Which of the following cellular event is true if these two cell lines are stimulated with growth factors to pass the restriction point?(A)Only the G₀ cell will replicate its DNA;(B)Only the G₁ cell will replicate its DNA;(C)Both cells will replicate their DNA;(D)Neither of the cells will replicate their DNA.

8. Which of the following conditions can fully turn on the Lac operon in Escherichia coli?
(A)Low glucose and lactose levels;
(B)Low glucose but high lactose levels;
(C)High glucose and lactose levels;
(D)Low cAMP and high glucose levels.

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