861. 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

862. E.coli ACP has its molecular weight as around
A. 9000
B. 19000
C. 39000
D. 90,000

863. The vitamin riboflavin is part of the __________ molecule.
A. ferredoxin
B. FAD
C. pyridoxal phosphat
D. pyrophosphate

864. The most prominent role that tocopherol has in in-vitro systems is as a strong
A. antioxidants
B. reducing agent
C. oxidizing agent
D. all of these

865. Biotin occurs mainly in combined forms bound to protein through
A. ε-N-lysine moiety
B. ε-S-lysine moiety
C. ε-N-biotinyl-L-lysine
D. ε-N-lipoyl – L-lysine

866. Lipoic acid is a co-factor of the
A. pyruvic dehydrogenase
B. α-ketoglutaric dehydrogenase
C. both (a) and (b)
D. di-hydroorotate dehydrogenase

867. β-carotene together with α-carotene, γ-carotene and cryptoxanthine are synthesized by
A. plants
B. animal
C. plants and animals both
D. none of these

868. Vitamin-D deficiency can cause
A. rickets
B. pernicious anemia
C. cataract
D. beri-beri

869. A deficiency of Vitamin K results in a decreased level of
A. prothrombin
B. thrombin
C. fibrin
D. fibrinogen

870. The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become
A. colorless on reduction with Zn in acid and regained its color on re-oxidation
B. colorless on oxidation and regained its color on reduction with Zn in acid
C. more deep in color on reduction with Zn in acid and regained its color on re-oxidation
D. more deep in color on oxidation and regained its color on reduction with Zn in acid

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