National Academy of Sports Medicine (NASM) Certified Personal Trainer (CPT) Practice Exam

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Which of the following is not a function of proteins in the body?

  1. Support cellular structure

  2. Store genetic information

  3. Catalyze biochemical reactions

  4. Transport molecules

The correct answer is: Store genetic information

Proteins serve multiple critical functions in the body, but storing genetic information is primarily the role of nucleic acids, such as DNA and RNA. DNA holds the genetic blueprint for organisms and is responsible for the storage, transmission, and expression of genetic information. While proteins can play a role in gene expression and regulation, they do not directly store genetic material in the way that DNA does. In contrast, proteins fulfill several essential roles: they provide structural support to cells and tissues, catalyze biochemical reactions through enzymes, and assist in the transport of various molecules throughout the body. Each of these functions highlights the versatility and importance of proteins in biological systems, contrasting with the distinct role of nucleic acids in genetic information storage.

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