Question

1. Which is not a lipid vitamin? a Vitamin A Vitamin C c. Vitamin D d. Vitamin E e. Vitamin K 2. Which kind of electron transfers are possible for FMNH2 and FADH2? a. Only one-electron transfers for both. b. Only two-electron transfers for both c. Either one or two-electron transfers for both d. Only one-electron transfers for FMNH, and two-electron transfers for FADH e. Only two-electron transfers for FMNH, and one-electron transfers for FADH2 3. Which coenzyme is most likely involved in the transfer of an acyl group? a. Coenzyme A b. NADH c. Biotin d. Ascorbic acid e. Thiamine diphosphate 4. Which of the following statements is false about carbohydrates? a. All linear forms contain a carbonyl group. b. A primary function is to store chemical energy. c. Monosaccharides are hydrophobic. d. Ring structures predominate for monosaccharides in solution. e. They have both branched and linear polymeric forms. 5. How are D and L assigned for carbohydrates? a. It is based on the optical rotation (D = dextrorotatory: L-levorotatory). b. By matching to the R/S conventions (D-R; L=S) c. The aldoses are all D. The ketoses are all L. d. By examining the position of the hydroxyl group on the next-to-last carbon in the Fischer projection (D has hydroxyl on the right; L has hydroxyl on the left.) e. All naturally occurring carbohydrates are assigned D. All synthetic carbohydrates are assigned L.

Answer 1

1) b) vitamin C

Lipid vitamin are A, D, E & K. Vitamin C is water soluble vitamin

2) c) Either one- or two- electron transfer for both

3) a) Coenzyme A

4) c) Monosaccharides are hydrophobic

Reason: All monosaccharides and disaccharides are hydrophilic

5) d) By examining the position of the hydroxyl group on the next-to-last carbon in the fischer projection (D has hydroxyl on the right; L has hydroxyl on the left)

CHO CHO HOGH H- OH CH2OH CH2OH L-Glyceral dehyde (hydroxy group on left) D-Glyceraldehyde (hydroxy group on right)