Vitamins and Minerals Overview
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Questions and Answers

Which type of vitamins are required in very small amounts and involved in fundamental functions in the body?

  • Provitamin-A carotenoids
  • Vitamin A
  • Fat soluble vitamins
  • Water soluble vitamins (correct)
  • What is the storage form of Vitamin A?

  • Retinyl palmitate (correct)
  • Vitamin A molecules
  • Aldehyde form
  • Retinoic acid
  • How is Vitamin A transported in the circulation for storage in the liver?

  • Converted to retinyl palmitate
  • Bound to retinoic acid
  • Released as retinol bound to RBP (correct)
  • Incorporated into chylomicrons
  • Which gene level mediator binds to target genes when activated by all-trans-retinoic acid (RA)?

    <p>Retinoid receptors</p> Signup and view all the answers

    What enzyme is responsible for bio-converting provitamin-A carotenoids to Vitamin A molecules in the small intestine?

    <p>Carotene cleavage enzyme</p> Signup and view all the answers

    What is the most specific and characteristic early symptom of Vitamin A deficiency?

    <p>Night blindness</p> Signup and view all the answers

    Which protein is involved in delivering retinol (Vitamin A) as well as thyroid hormone to tissues?

    <p>RBP (Retinol binding protein)</p> Signup and view all the answers

    Which physiological activity is regulated by vitamin A's active form, retinoic acid, among the following?

    <p>Cell division</p> Signup and view all the answers

    What is a common symptom associated with Vitamin A deficiency that affects vision?

    <p>Delayed adaptation to the dark</p> Signup and view all the answers

    Which eye structure is specifically affected in Vitamin A deficiency, leading to blindness?

    <p>Cornea</p> Signup and view all the answers

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