Nutritionally incomplete proteins are low in __________.

• A. one or more of the essential fatty acids
• B. one or more of the major vitamins
• C. one or more of the coenzymes
• D. one or more of the essential amino acids

Answer: (D)

Verified step by step guidance

1. Understand the concept of nutritionally incomplete proteins: These are proteins that lack one or more of the essential amino acids required by the body.
2. Recall that essential amino acids are those that cannot be synthesized by the body and must be obtained through diet.
3. Review the options provided: essential fatty acids, major vitamins, coenzymes, and essential amino acids.
4. Identify that the question is asking about proteins, which are made up of amino acids, not fatty acids, vitamins, or coenzymes.
5. Conclude that nutritionally incomplete proteins are low in one or more of the essential amino acids, as these are the building blocks of proteins.