Vignette #1 John Is 35 and Interested in Gaining Muscle

question 6

Multiple Choice

Vignette #1 John is 35 and interested in gaining muscle mass. He wants to do it as quickly as possible and goes to the local health food store. The clerk approaches him wearing a white lab coat-this immediately impresses John, who now thinks that the clerk is well informed. John explains that his goal is to gain the maximum muscle mass in the shortest time. The clerk gets a twinkle in his eye and says "Let me show you what we have that will certainly help you." Let's see if the clerk really knows what ergogenic aids are all about by answering these questions. The clerk recommends John purchase coenzyme Q₁₀. Which statement is incorrect about this substance?

• A) Coenzyme Q₁₀ is a lipid used by cells in energy metabolism.
• B) Coenzyme Q₁₀ is an essential nutrient.
• C) Coenzyme Q₁₀ may play an antioxidant role.
• D) Coenzyme Q₁₀ has not been shown to improve athletic performance.

---

Definitions:

Reverse Transcriptase

An enzyme used by some viruses to synthesize DNA from an RNA template, a critical component of the replication process of retroviruses.

Retroviruses

A class of viruses that reverse-transcribe their RNA genome into DNA for integration into the host's genome.

Nucleic Acid

Macromolecules essential for all known forms of life, which store and transfer genetic information in cells (e.g., DNA and RNA).

Reverse Transcriptase

An enzyme used by retroviruses to transcribe their RNA into DNA, allowing them to integrate into the host genome.