21. Vitamin-C is considered as a

A. water soluble
B. fat soluble
C. fat and water soluble
D. none of these

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22. The vitamin niacin is part of the __________ molecule.

A. ferredoxin
B. pyridoxal phosphate
C. pyrophosphate
D. NAD⁺

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23. Which of these hormones is a catecholamine?

A. Follitropin
B. Norepinephrine
C. Tetraiodothyronine
D. Tetrahydrofolate

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24. Dihydroorotate dehydrogenase contains

A. 4 flavins and 4 atoms of iron per molecule
B. 2 flavins and 4 atoms of iron per molecule
C. 2 flavins and 2 atoms of iron per molecule
D. 4 flavins and 2 atoms of iron per molecule

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25. E.coli ACP has its molecular weight as around

A. 9000
B. 19000
C. 39000
D. 90,000

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