Which molecule is primarily produced during cellular respiration?

• A. ATP
• B. Glucose
• C. Oxygen
• D. NADH

Answer: (A)

Verified step by step guidance

1. Begin by understanding the process of cellular respiration, which is a series of metabolic reactions that convert biochemical energy from nutrients into adenosine triphosphate (ATP), and release waste products.
2. Identify the main stages of cellular respiration: glycolysis, the citric acid cycle (Krebs cycle), and oxidative phosphorylation. Each stage contributes to the production of ATP.
3. Recognize that ATP is the primary energy carrier in cells, and its production is the main goal of cellular respiration. ATP stores energy in its high-energy phosphate bonds, which can be used by the cell for various functions.
4. Consider the role of glucose in cellular respiration. Glucose is the initial substrate that is broken down during glycolysis to eventually produce ATP. It is not the final product but rather the starting material.
5. Understand the roles of oxygen and NADH. Oxygen is the final electron acceptor in the electron transport chain, allowing for the production of ATP during oxidative phosphorylation. NADH is an electron carrier that transfers electrons to the electron transport chain, facilitating ATP production.