Vitamins

Question 1

Required in oxidative decarboxylation

Answer 1

Thiamine

Question 2

Contains a glumate residue

Answer 2

Folic acid

Question 3

Participates in the conversion of homocysteine o methionine

Answer 3

Vitamin b12

Question 4

A water souble vitamin

Answer 4

Ascorbic acid

Question 5

High doses are contraindicated in pregnancy

Answer 5

Vitamin A

Question 6

B12

Answer 6

Contains a heme group
Absent in vegetarian diet
It can be converted to cofactor required for the conversion of methlmalonyl CoA to succinyl CoA
It requires a glycoprotein for absorption.

Question 7

Dehydroascorbate is a toxic intermediate of as orbit metabolism that could potentially accumulate in some individuals which routinely very high doses of the vitamin .

Answer 7

True

Question 8

Ascorbic acid is a cofactor required for the hydroxyl action of

Answer 8

Praline and lysine

Question 9

Biotin is the coenzyme for

Answer 9

Carboxylation

Question 10

Riboflavin is the precursor for

Answer 10

Fad and fmn

Question 11

Niacin deficiency leads to ?

Answer 11

Pellagra

Question 12

Biotin is required for the carboxylate of acetyl Co to malonyl CoA, an intermediate in fatty acid synthesis.

Answer 12

True

Question 13

Retinol is transported from the intestines to the liver in ?

Answer 13

Chylomicrons

Question 14

Retinal is photoisomerised during the visual cycle

Answer 14

True

Question 15

Renal failure requires the administration of

Answer 15

1,25 dihydroxycholecalciferol

Question 16

The active form of vitamin D is

Answer 16

1,25- dihydroxycholecalciferol

Question 17

A deficiency in vitamin D increases or decreases the secretion of calcitonin

Answer 17

Decreases