The amino acid from which niacin synthesized is_______________?
Correct answer: B. Tryptophan
- A. Tyrosine
- B. Tryptophan
- C. Threonine
- D. Histidine
Explanation
Tryptophan can be converted into niacin through the kynurenine pathway, although the conversion is inefficient and requires vitamin B6. Tyrosine, threonine and histidine are not niacin precursors.
Last updated
Practise Vitamins and Minerals
77 free Vitamins and Minerals MCQs from Biochemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biochemistry questions like this
Biochemistry is on 3 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A patient with chronic renal failure and bone pains will have deficiency of which vitamin_____________?
Absorption of vitamin K requires normal absorption of_________________?
Active form of vitamin D in kidney is_____________?
All of the following are true about manifestations of vitamin E deficiency except_____________?
Angular cheilosis is frequently associated with deficiency of______________?