1. The disulfide bond is a covalent linkage formed between two cysteine residues in proximity under an oxidative environment. In eukaryotic cells, disulfide bonds can be formed only in:(A)The cytosol;(B)Endoplasmic reticulum;(C)Endosomes;(D)Mitochondria.

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.

1. The disulfide bond is a covalent linkage formed between two cysteine residues in proximity under an oxidative environment. In eukaryotic cells, disulfide bonds can be formed only in:
(A)The cytosol;
(B)Endoplasmic reticulum;
(C)Endosomes;
(D)Mitochondria.

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