mdcat logical reasoning MCQ #989

Dr. Khan's patient has an inherited disorder that affects the ability to convert tryptophan into niacin. Which enzyme is deficient in this condition?

mdcat logical reasoning MCQ #989

  1. Question 1

    Q1. Dr. Khan's patient has an inherited disorder that affects the ability to convert tryptophan into niacin. Which enzyme is deficient in this condition?

    • A) Tryptophan transaminase
    • B) Alanine transaminase
    • C) Kynureninase
    • D) Indoleamine 2,3-dioxygenase

    Answer: Kynureninase

    Explanation: Kynureninase deficiency prevents tryptophan conversion to niacin in Pellagra. USAT, HAT and MDCAT analytical sections repeat this pattern.