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Select all that applyWhy are corn-based diets associated with pellagra?Multiple select question.Corn contains enzymes that degrade all niacin.Niacin in corn is unavailable.Corn contains little tryptophan.Corn contains no niacin.

Question

Select all that applyWhy are corn-based diets associated with pellagra?Multiple select question.Corn contains enzymes that degrade all niacin.Niacin in corn is unavailable.Corn contains little tryptophan.Corn contains no niacin.

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Solution

The correct answers are:

  • Niacin in corn is unavailable.
  • Corn contains little tryptophan.

Explanation:

Pellagra is a disease caused by a deficiency in niacin, also known as vitamin B3. Corn, especially in its unprocessed form, contains niacin, but it is in a form that is not easily absorbed by the human body, making it "unavailable" for nutritional purposes.

Tryptophan is an amino acid that the body can convert into niacin. If a diet is low in tryptophan, it can contribute to a niacin deficiency. Corn is known to contain less tryptophan compared to other food sources, which can contribute to the development of pellagra in populations that rely heavily on corn as a dietary staple.

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