Which statement best describes the distribution of dietary proteins in common food sources?

• A. Proteins are found only in plant foods and not in animal foods.
• B. Proteins are found only in fruits and refined sugars.
• C. Proteins are found in both animal and plant foods.
• D. Proteins are found only in animal foods and not in plant foods.

Answer: (C)

Verified step by step guidance

1. Understand that dietary proteins are macromolecules made up of amino acids, essential for various bodily functions including tissue repair and enzyme production.
2. Recognize that proteins are present in a wide variety of food sources, both from animals and plants, though their amino acid profiles may differ.
3. Recall that animal foods such as meat, dairy, and eggs are rich sources of complete proteins, containing all essential amino acids.
4. Note that plant foods like legumes, grains, nuts, and seeds also contain proteins, but some may lack one or more essential amino acids, making them incomplete proteins individually.
5. Conclude that the correct statement is that proteins are found in both animal and plant foods, reflecting the broad distribution of dietary proteins across common food sources.