5. Collagen is an essential component of the extracellular matrix. A deficiency in which of the following nutrient will disable collagen biogenesis:(A)Vitamin A;(B)Vitamin B;(C)Vitamin C;(D)Vitamin D.

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.

5. Collagen is an essential component of the extracellular matrix. A deficiency in which of the following nutrient will disable collagen biogenesis:
(A)Vitamin A;
(B)Vitamin B;
(C)Vitamin C;
(D)Vitamin D.

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