11. Which of the following vitamins provides the cofactor for transfer of one-carbon units?
12. Which one of these vitamins has a role as an antioxidant?
13. Which one of these vitamins has a role in oxidation and reduction reactions?
14. Which one of these vitamins has a role in oxidation and reduction reactions?
15. Which one of these vitamins is involved in blood clotting?
16. Which one of these vitamins is involved in calcium homeostasis?
17. Which one of these vitamins is involved in controlling cell differentiation and proliferation?
18. Which one of these vitamins is involved in controlling cell differentiation and proliferation?
19. Which one of these vitamins is required for DNA synthesis?
20. Which one of these vitamins may mask the anaemia of vitamin B12 deficiency?
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