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

Related Mcqs:

1. Enzyme + coenzyme constitutes_____________?

   A. Apoenzyme
   B. Proenzyme
   C. Protoenzyme
   D. Holoenzyme

2. 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

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

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

4. Vitamin B12 is_______________?

   A. Extrinsic factor of castle
   B. Intrinsic factor of castle
   C. Cyano cobalamine
   D. A fat soluble vitamin

5. Coenzyme A contains which of the following vitamins_______________?

   A. Biotin
   B. Pyridoxine
   C. Pantothenic acid
   D. Niacin

6. Which of the following enzymes use NADP as coenzyme ________________?

   A. Glyceraldehyde 3 phosphate dehydrogenase
   B. Lactate dehydrogenase
   C. Glucose 6-Phosphate dehydrogenase
   D. Beta hydroxy acyl CoA dehydrogenase

7. Coenzyme forms are correctly matched except_____________?

   A. Biotin – carboxylated biotin
   B. Vitamin B – ATP
   C. Niacin – NAD+NADP
   D. Vitamin B2 – FMN+FAC

8. Adrenaline acts on which enzyme in glycogenolysis ?

   A. Glucokinase
   B. Hexokinase
   C. Phosphorylase
   D. Glucose diphosphatase

9. Insulin acts on which enzyme in glycolysis ?

   A. Glucokinase
   B. Hexokinase
   C. Glucose 6 phosphatase
   D. Adenylate kinase

10. Vit B12 is absorbed in the_____________?

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