Discussion
Home ‣ Biochemistry ‣ Vitamins and Coenzymes Comments
- Question
Lipoic acid exists in
Options- A. oxidized form
- B. reduced form
- C. oxidized and reduced form both
- D. none of these
- Correct Answer
- oxidized and reduced form both
- 1. Vitamin B12 (Cobalamin) is only synthesized by
Options- A. fishes
- B. micro-organisms
- C. plants
- D. animals Discuss
- 2. What compound of raw egg white causes a syndrome similar to vitamin B deficiency?
Options- A. Avidin
- B. Betabindin
- C. Ovalbumin
- D. Albumin Discuss
- 3. In one iron-metalloflavoprotein, the iron is present as a
Options- A. heme-protein
- B. nonheme type
- C. both (a) and (b)
- D. flavin moiety Discuss
- 4. Ascorbic acid acts as an
Options- A. reducing agent
- B. oxidizing agent
- C. oxidizing and reducing agent both
- D. none of the above Discuss
- 5. The vitamin riboflavin, which occurs as a yellow pigment in egg yolk and milk become
Options- 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 Discuss
- 6. The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin
Options- A. B12(Co2+)to B12(Co)
- B. B12(Co) to B12(Co2+)
- C. B12(Co2+)to B12(Co+)
- D. B12(Co+)to B12(Co2+) Discuss
- 7. What metal ion is specifically bound by vitamin B12?
Options- A. Cobalt
- B. Copper
- C. Zinc
- D. Iron Discuss
- 8. Vitamin-C is considered as a
Options- A. water soluble
- B. fat soluble
- C. fat and water soluble
- D. none of these Discuss
- 9. Main function of insulin hormone is to
Options- A. increase glycogen in liver
- B. decrease glycogen in liver
- C. increase blood sugar
- D. decrease blood sugar Discuss
- 10. In the equation, A = ? bc, what quantity is represented by "?"?
Options- A. Absorbtivity
- B. Molar absorbtivity
- C. Path length
- D. None of these Discuss
Vitamins and Coenzymes problems
Search Results
Correct Answer: micro-organisms
Correct Answer: Avidin
Correct Answer: heme-protein
Correct Answer: reducing agent
Correct Answer: colorless on reduction with Zn in acid and regained its color on re-oxidation
Correct Answer: B12(Co2+)to B12(Co+)
Correct Answer: Cobalt
Correct Answer: water soluble
Correct Answer: decrease blood sugar
Correct Answer: Molar absorbtivity
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