A. Methyl B12
B. Hydroxy B12
C. Cyano cobalamine
D. None of the above
Related Mcqs:
- 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 - Vitamin B12 is_______________?
A. Extrinsic factor of castle
B. Intrinsic factor of castle
C. Cyano cobalamine
D. A fat soluble vitamin - Mineral present in Vit B12 is_____________?
A. Selenium
B. Cobalt
C. Iron
D. Calcium - Vit B12 is absorbed in the_____________?
A. Stomach
B. Terminal ileum
C. Lower jejunum
D. Proximal ileum - 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 - The intrinsic factor for vitamins B12 absorption is produced in the______________?
A. Liver
B. Stomach
C. Pancreas
D. Duodenum - Intrinsic factor for absorption of Vit B12 secreted in ______________?
A. Duodenum
B. Stomach
C. Intestine
D. Ileum - Vitamin C is present in largest amount in the body in____________?
A. Eye
B. Kidneys
C. Testes
D. Adrenal cortex - Partial or complete obstruction of some part of the C.V.S by a foreign body transported by the blood stream is termed as_____________?
A. Thrombosis
B. Coagulation
C. Ischaemia
D. Embolism - Biological activity of tocopherols has been attributed, in part to their actions as_____________?
A. Antioxidant
B. Anticoagulants
C. Provitamin
D. Antidotes for selenium poisoning
