medical MCQs – Page 389

Practise multiple-choice questions from medical for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

medical Mcqs

1. oral anatomy 2. microbiology 3. oral pathology and medicine 4. physiology 5. biochemistry 6. general anatomy 7. dental materials 8. pharmacology 9. pathology 10. oral histology

7761. Vitamin K____________?
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A. Inhibition of antithrombin

B. Prevention of capillary fragility

C. Helps in formation of prothrombin

D. Stimulation of hematopoiesis in red bone marrow

7762. Thiamine deficiency causes decreased energy production because____________?
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A. It is co-enzyme for transketolase in pentose phosphate pathway

B. It is required for the process of transmination

C. It is co-factor in oxidative reduction

D. It is co-enzyme for pyruvate dehydrogenase

7763. Beri-beri is caused due to the deficiency of______________?
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A. Pyridoxine

B. Riboflavin

C. Ascorbic acid

D. Thiamine

7764. Mineral present in Vit B12 is_____________?
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A. Iron

B. Cobalt

C. Calcium

D. Selenium

7765. Which vitamin is synthesized by intestinal bacteria ?
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A. Vit B

B. Vit A

C. Vit D

D. Vit K

7766. The vitamin that facilitates iron absorption____________?
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A. Biotin

B. Para amino benzoic acid

C. Folic acid

D. Ascorbic acid

7767. In humans and other primates as well as in guinea pigs, this vitamin cannot be synthesized because of the absence of the enzyme L-gulonolactone oxidase: the vitamin is_____________?
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A. Nicotinic acid

B. Pantothenic acid

C. Folic acid

D. Ascorbic acid

7768. The reaction inhibited in thiamine deficiency is_______________?
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A. None of the above

B. Succinyl CoA to fumarate

C. Citrate to alpha ketoglutarate

D. Pyruvate to acetyl CoA

7769. Vit-K deficiency is indicated by___________?
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A. None of the above

B. Increased prothrombin time

C. Decreased prothrombin time

D. Low platelet count

7770. 1st clinical sign of vitamin A deficiency is_____________?
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A. bitots spots

B. xerostomia

C. conjunctival xeroses

D. night blindness

7771. Specific disease caused by vitamin B1 deficiency_______________
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A. Pellagra

B. Megaloblastic anemia

C. Peripheral polyneuritis

D. Angular cheilitis

7772. Deficiency of nicotinic acid results in____________?
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A. Beri-beri

B. Pernicious anemia

C. Night blindness

D. Pellagra

7773. Vitamin B12 acts as a coenzyme to which one of the following enzyme ?
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A. Homocyteine methyl transferase

B. G-6-P dehydrogenase

C. Glycogen synthase

D. Isocitrate dehydrogenase

7774. Active form of vitamin D in kidney is_____________?
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A. 25 hydroxy cholecalciferol

B. 1 dihydroxy cholecalciferol

C. 7 dihydroxy calciferol

D. 1,25 dihydroxy cholecalciferol

7775. The mineral having sparing action on Vitamin E_______________?
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A. Selenium

B. Iron

C. Iodine

D. Chromium

7776. Rhodopsin deficiency is chiefly associated with________________?
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A. Vitamin D deficiency

B. Vitamin A deficiency

C. Scurvy

D. Rickets

7777. Fast soluble vitamins are_____________?
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A. A, B, E, K

B. A, B , D, K

C. A, D. E, K

D. A, C, E, K

7778. The function of vitamin A is/are related to which of the following ?
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A. Retinol

B. Retinoic acid

C. All of the above

D. Retinal

7779. Of prime importance in the structure of flavoproteins is____________?
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A. Vit A

B. Vit B1

C. Vit B2

D. Vit B6

7780. A patient with chronic renal failure and bone pains will have deficiency of which vitamin_____________?
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A. Vitamin B

B. Vitamin A

C. Vitamin D

D. Vitamin C

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