Clinical Nutritionist Practice Test

Eggs are considered a complete protein source because they contain all nine essential amino acids that the body cannot synthesize on its own. This makes them an ideal food for supporting muscle repair, growth, and overall bodily functions. In addition, eggs have a high biological value, meaning they are efficiently utilized by the body for various metabolic processes.

Quinoa is also known for being a complete protein; however, the question may be focusing specifically on more traditional sources of complete protein, such as animal products. Broccoli and brown rice are not complete proteins; they lack one or more essential amino acids. While they can still contribute to overall protein intake and nutritional variety, they would need to be combined with other food sources to provide all essential amino acids in sufficient amounts.