Vitamins - Test

Matching, true and false and Completion Select and encircle the completion: most appropriate answer or PLP 1. Pyridoxal phosphate is cofector for which of the following enzymatic reaction? A. Fixation of carbon dioxide. B. Oxidation-reduction C. Transaminases. B7 Cox commer D. One carbon group transfer THE E. Decarboxylation of a-ketoacids. "FB1 KG dehydrogenase 2. INCORRECT? the following statements concerning vitamin E is A. Diet rich in vitamin E decreases the risk of heart diseases. Anti-oxidimb It oxygen superoxide radical. C. It removes peroxide formation in polyunsa tresteddietty acids D. Its deficiency usually occurs in premature infants. . Long term deficiency leads to night blindness. 3. Which one of the following statements concerning water soluble vitamins is INCORRECT? Reto aciunctions as coenzyme for oxidative decarboxylation of B. Pantothenic acid is a part of acyl carrier protein (ACP). C. Pyridoxal phosphate (PLP) is essential for heme metabolism. D. People who depend on corn in their diety de no Tryptophar E. Folate deficiency may accompany vitamin B12 deficiency due to complexity between the two vitamins. 4. Vitamin K. A. Is a water soluble vitamin. B. Vitamin K, is synthetic. C. Essential for clot formation. 7151→ plants Knormal Flora +3 synthetic D. Present normally in the intestine of newborn infants. X E. Long use of dicumarol promotes its action.K C 5. Which one of the following statements concerning L-ascorbic acid is INCORRECT? A. Dehydro-L-ascorbic acid is inactive form of vitamin C. B. It is cofactor in hydroxylation of proline and lysine, collayen C. It is an antioxidant. D. Long term deficiency leads to scurvy. E. It acts as reducing agent and important for iron absorption. Fet 6. Which one of the following statements concerning niacin is CORRECT? A. It is a coenzyme for carboxylation reactions, B. Is the precursor of FAD coenzyme, Biotin C. Its deficiency leads to Beri beri. x X NAD B1/B3 Pellagra D. It is essential for formation of the coenzymes NAD' and NADP E. It is rich in maize. Gno Tryptophane/no niacin Oraby's instrated reviews of biochemistry (Q&A) 7. a deficiency of pyridoxal phosphate (PLP) may be accompanied by aff the following EXCEPT A. Disturbance in amino acids metabolism. B. Convulsions in young infants. C. Pellagra 9. Scurvy.rid C E. Microtytic, hypochromic anemia. B. Which one of the following statements concerning vitamin B12 is INCORRECT? A. It red in color. methionine is a cofactor for conversion of moorpsteine into . It requires intrinsic factor C its D. Restrict vegetarians develops 812deficiency. E. It contains heme ring. x 9. Vitamin K plays a role in biosynthesis of: A. collagen and elastin B. prothrombin and osteocalcin C. heparin and heparin sulfate D. prostaglandins and Leukotrienes E. Electron transport 10. Thiamine gives: A. T3 and T4 B. COA +135 C. TPP D. PLP -136 11.Carboxylation of pyruvate requires: A. Thaimin pyrophosphate. B. 8 C. Pyrodixal phosphate. D. Biotin. E. Folic acid 12.THFA is coenzyme for: A. Trasport of amino group B. CO2 fixation C. Transport of methylene group D. Transport of oxygen 13. Vitamin E acts as: A. Anti-rickets B. Anti-scurvy C. Antibody D. Antioxidant 14. Vitamin K is essential for: A. Synthesis of prothrombin B. Synthesis of calcitonin C. Synthesis of serotonin D. Synthesis of catecholamines E. Iron absorption Viramm 15. Vitamin B12 contains: A. Iron B. Copper C. Zinc p. Selenium . Cobalt 16. in the regeneration of methionine from homocysteine, which of vitamin(s) or vitamin derivative(s) are involved: the following A. Lipoic acid B. Retinoic acid C. Biotin and thiamine pyrophosphate D. Tetrahydrofolate and vitamin B12 E. Vitamins E and K 17.WORRECT of the following statements concerning vitamin D is A. Hypophosphatemes direct activation of vitamin D.X CPTH B. causes indirect activatlamin DXPO-D C. Vitamin D deficiency causes osteomalacia in childreny Rickets D. Calcitriold causes normalization of serum calcium by acting on bones, kidney and intestine. E. Vitamin D opposes the effect of parathyroid hormone 18. Biotin is coenzyme for: A. Carboxylation reactions B. Transamination reactions C. Transmethylation reaction D. Decarboxylation reactions 19. The disease pellagra is due to a deficiency of: A. Vitamin B, B. Biotin C. Pantothenic acid D. Folic acid E. Niacin 20. Anti beriberi vitamin is: A. Ribovlavin B. Thiamin C. Ascorbic acid D. Nicotonic acid 21.Cobamides are coenzymes derived from: A. Folic acid B. Vitamin C C. Vitamin B12 D. Cobalt E. Nicotonic acid 22.8-Carotene is converted to vitamin A in the: A. Liver B. Intestine C. Spleen D. Adrenal cortex E. Adipose tissue Oraby's illustrated reviews of 23. Activation of vitamin D3 occurs in: A. Liver and intestine B. Liver and kidney C. Bone and intestine D. Bone and kidney E. Liver and bone 24. Which one of the following statements concerning vitamin D is CORRECT: A. Chronic renal failure requires administration of 1,25 B. Vitydroxyhis required in the diet of individuals exposed to dihydroxycholecalciferol. C. sunlightoxycholecalciferol is the active ford hormonetamin. x 1.25 D. Vitamin D opposes the effect of parathyroid hormone. K E. A deficiency of vitamin D results in an increased secretion in calcitonin.x 25. Skin disorders can occur in case of deficiency of: A. Niacin Dernpatitis B. Retinol keroderma C. Vitamin K D. Both niacin and retinol E. Both Retinol and vitamin K 26. The absorption of light by cells in the retina of the eye results in the conversion of: A. B-caroene to retinal. B. Cis-retinal to all trans-retinal. C. All trans-retinal to cis-retinal. D. Retinal to retinol. E. Retinol to retinal. 27.Which of the following characterstics would be seen in a patient with a severe deficiency of thiamin: A. A decreased level of blood pyruvate and lactate. B. An increased clotting time of blood. frit K C. A low hepatic cell transaminase activity. B6 D. A decreased level of transketolase activity in red blood cells. E. A decreased level of blood calcium. trit.D 28. Oxidative decarboxylation of pyruvate requires: A. Thiamine pyrophosphate B. B12 C. Pyrodixal phosphate. D. Biotin. E. Folic acid 29. The vitamin which acts as co-carboxylase is: A. B₁ B. B C. Niacin D. Biotin E. B12 Decarboxylation of glutamate requires: 30. A. Thiamine pyrophosphate. B. B12 Pyrodixal phosphate. 95 oxidation D. Biotin. E. Folic acid 31. Vitamin E is a substance that A. Produces rancidity B. Prevents rancidity C. Produces Hardening of oils D. Produces emulsification of oils 32. Which of the following stimulates protein in intestinal mucosa? the synthesis of calcium binding A. Calcium B. Calcitriol uit D C. Calcitonin D. a Tocopherol E. Parathyroid hormone Pellugra 33. Theociated with of adementia, diarrhea, dermatitis and death are a deficiency of: A. Vitamin A B. Vitamin B12 C. L-ascorbic acid D. Biotin E. Niacin 34. The function of vitamin E is: A. Antioxidant B. Anticoagulant C. Precursor of vitamin A D. Antidote for heparin 35. All the following vitamins are fat soluble EXCEPT: A. Vitamin A B. Vitamin C C. Vitamin D D. Vitamin E E. Vitamin K 36. Vitamin B12: A. is a fat soluble vitamin K H₂O soluble B. a vitamin not needed in diet because it is synthesized by intestinal bacteria. K C. is a zinc containing B vitamin.x+cobalt D. Needs intrinsic factor for absorption E. present in animal and plant sources Animal onky 37. A vitamin that is acting as a reducing agent is: A. Thiamin B. Vitamin B12 C. Vitamin C D. Folic acid EYCYA E. Biotin Oraby's illustrated reviews of biochemistry (Q&A) 38. Whole grain cereals is an excellent source of: A. Vitamin D B. Ascorbic acid . Thiamine D. Vitamin A E. All of these 39. Riboflavin is a constituent of: A. Carboxylase B. Pantothenic acid C. NAD D. FAD 40. Vitamin D is required for the prevention of: A. Beriberi BI B. ScurvyC C. Rickets D. Pellagra E. Night blindness Bs A 41. Pellagra may result from the deficiency of the following EXCEPT A. Niacin B. Biotin D. Pyridoxal phosphate D. Tryptophan Typtophan vid B6