4. Which of the following nucleotide sequence is likely a recognition site of a restriction enzyme?(A)GCTACG;(B)ATGCTA;(C)CTCGTG;(D)AGATCT.

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.

4. Which of the following nucleotide sequence is likely a recognition site of a restriction enzyme?
(A)GCTACG;
(B)ATGCTA;
(C)CTCGTG;
(D)AGATCT.

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