Biochemistry Quiz – I

Biochemistry Quiz – I

Which Vitamin is required to make the building blocks for collagen ?

Correct! Wrong!

Vitamin C is required to make the building blocks for collagen

'corkscrew' hair growth seen in which vitamin deficiency?

Correct! Wrong!

Vitamin C Deficiency - spongy gums, 'corkscrew' hair growth, and poor wound healing

Which sugar in Breast milk help to prevent infectious diseases?

Correct! Wrong!

Breast milk contains a unique type of sugars, human milk oligosaccharides (HMOs), which are not present in infant formula. HMOs are not digested by the infant but help to make up the intestinal flora.


They act as decoy receptors that block the attachment of disease causing pathogens, which may help to prevent infectious diseases.

Ascorbic acid is required as a cofactor for which of the following enzyme?

Correct! Wrong!

Ascorbic acid is required as a cofactor for prolyl hydroxylase and lysyl hydroxylase. These two enzymes are responsible for the hydroxylation of the proline and lysine amino acids in collagen.


Hydroxyproline and hydroxylysine are important for stabilizing collagen by cross-linking the propeptides in collagen.

The metabolically active form of Vitamin B6 is -

Correct! Wrong!

Pyridoxal 5′-phosphate - metabolically active form of vitamin B6.


involved in many aspects of macronutrient metabolism, neurotransmitter synthesis, histamine synthesis, hemoglobin synthesis and function, and gene expression.

Which Vitamin is required for the conversion of tryptophan to niacin?

Correct! Wrong!

Vitamin B6 is required for the conversion of tryptophan to niacin

Which vitamin plays a cofactor role in releasing selenium from selenohomocysteine to produce hydrogen selenide?

Correct! Wrong!

Vitamin B6 plays a cofactor role in releasing selenium from selenohomocysteine to produce hydrogen selenide, which can then be used to incorporate selenium into selenoproteins.

Major products of vitamin B6 metabolism which is excreted in the urine -

Correct! Wrong!

Major products of vitamin B6 metabolism that is excreted in the urine is 4-pyridoxic acid.

All of the following are the biochemical tests most widely used for Vitamin B6 Deficiency EXCEPT?

Correct! Wrong!

Biochemical tests most widely used -


Activation coefficient for the erythrocyte enzyme aspartate aminotransferase,
Plasma PLP concentrations,
Urinary excretion of vitamin B6 degradation products, specifically urinary PA.

Which of the following is FALSE for Megavitamin-B6 syndrome is -

Correct! Wrong!

Also known as hypervitaminosis B6

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