Which of the following best describes amino acids that cannot be naturally produced by the body and, therefore, are obtained through the organism's diet?

Question

Quizplus · Accepted Answer

Essential amino acids cannot be made by the body. As a result, they must come from food. 
Nonessential amino acids are amino acids that can be made by the human body, so they are not essential to the human diet. 
Steroids are a type of lipid. Steroids have two main functions: they are important parts of cell membranes; and they act as signaling molecules.
Enzymes are a type of protein that act as a catalyst to bring about a specific biochemical reaction.

Which of the Following Best Describes Amino Acids That Cannot