What is the primary energy transfer molecule in cells?

• A. FADH2
• B. NADH
• C. ATP
• D. GTP

Answer: (C)

Verified step by step guidance

1. Identify the role of each molecule listed in the options: FADH2, NADH, ATP, and GTP.
2. Understand that FADH2 and NADH are electron carriers involved in cellular respiration, specifically in the electron transport chain.
3. Recognize that GTP is similar to ATP but is primarily used in protein synthesis and some specific cellular processes.
4. Learn that ATP (adenosine triphosphate) is the primary energy transfer molecule in cells, used to power various cellular activities.
5. Conclude that ATP is the correct answer as it is the main molecule that transfers energy within cells for metabolic processes.