Question

multiple choice question
how does net protein utilization for animal protein compare to net protein utilization for plant protein?

it is usually higher for plant protein

it is usually higher for animal protein.

humans cannot utilize the proteins found in plants and must include animal proteins in their diet.

it is the same for all animal and plant proteins.

Explanation:

To solve this, we analyze each option:

• Option 1: Plant proteins often have incomplete amino acid profiles, so net protein utilization (NPU) is not usually higher for plant protein. Eliminate.
• Option 2: Animal proteins are generally complete (contain all essential amino acids in proper ratios), leading to higher NPU as the body can utilize them more efficiently. This is correct.
• Option 3: Humans can utilize plant proteins (e.g., from legumes, nuts) and don't need animal protein (though it can be a source). Eliminate.
• Option 4: NPU varies between animal and plant proteins due to amino acid composition, so they aren't the same. Eliminate.

Answer:

B. It is usually higher for animal protein.