Vitamins and Coenzyme Functions-II

Vitamin synthesized by bacterial in the intestine is:

• A

• D

• E

• K

• B1

The vitamin required for the formation of hydroxyproline (in collagen) is ____

• retinol

• ascorbic acid

• thiamine

• tocopherol

• folate

Scurvy is caused due to the deficiency of ____

• vitamin C

• vitamin E

• vitamin D

• vitamin A

• vitamin B9

Thiamine pyrophosphate is involved in:

• hydroxylation

• oxidative decarboxylation

• transamination

• carboxylation

• hydrolysis

Riboflavin is a coenzyme in the reaction catalysed by the enzyme: (may have multiple answers)

• Acyl CoA synthetase

• Acyl CoA dehydrogenase

• Beta-hydroxy acyl CoA

• Enoyl CoA dehydrogenase

• pyruvate dehydrogenase

The pellegra preventive factor is:

• riboflavin

• thiamine

• niacin

• ascorbate

• retinal

The precursor of Coenzyme A is:

• pantothenate

• vitamin B5

• vitamin B3

• nicotinamide

• folate

Pyridoxal phosphate (PLP) is central to:

• enolization

• transamination

• amidation

• deamination

• carboxylation

Biotin is a coenzyme of the enzyme _____

• decarboxylase

• carboxylase

• hydroxylase

• deaminase

• transaminase

A molecule of CO2 is captured by biotin when it acts as coenzyme for carboxylation reaction. The carboxyl group is covalently attached to _____

• A nitrogen (N₁) of the biotin molecule

• sulphur of thiophene ring

• alpha-amino group of lysine

• amino group of protein

• carbonyl group of the biotin molecule