Vitamin B12 is_______________?

Related Mcqs:

1. Vitamin B12 acts as a coenzyme to which one of the following enzyme ?

   A. Isocitrate dehydrogenase
   B. Homocyteine methyl transferase
   C. Glycogen synthase
   D. G-6-P dehydrogenase

2. Most of vitamin B12 in the body is stored as_____________?

   A. Methyl B12
   B. Hydroxy B12
   C. Cyano cobalamine
   D. None of the above

3. Mineral present in Vit B12 is_____________?

   A. Selenium
   B. Cobalt
   C. Iron
   D. Calcium

4. Vit B12 is absorbed in the_____________?

   A. Stomach
   B. Terminal ileum
   C. Lower jejunum
   D. Proximal ileum

5. 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_____________?

   A. Pantothenic acid
   B. Nicotinic acid
   C. Ascorbic acid
   D. Folic acid

6. The intrinsic factor for vitamins B12 absorption is produced in the______________?

   A. Liver
   B. Stomach
   C. Pancreas
   D. Duodenum

7. Intrinsic factor for absorption of Vit B12 secreted in ______________?

   A. Duodenum
   B. Stomach
   C. Intestine
   D. Ileum

8. Untrue about vitamin D is_______________?

   A. UV light helps in formation
   B. Increased parathyroid hormone secretion is seen in renal failure
   C. Hydroxylation of 25-hydroxycholecalcitenol occurs in kidney
   D. 25-hydroxycholecalciferol is used in treatment of renal failure

9. Vitamin K____________?

   A. Helps in formation of prothrombin
   B. Inhibition of antithrombin
   C. Prevention of capillary fragility
   D. Stimulation of hematopoiesis in red bone marrow

10. The action of vitamin K in formation of clotting factor is through__________________?

    A. Post transcription
    B. Post translation
    C. Golgi complex
    D. Endoplasmic reticulum