Which of the following statements is true about glucose and ATP?

(1) Glucose is made during photosynthesis.

(2) The energy in sunlight is temporarily stored in glucose before it is transferred to ATP.

(3) ATP is the energy-carrying molecule that cells use for energy.

(4) The processes that make ATP and glucose also recycle oxygen in Earth's atmosphere.

1 answer

All four statements contain elements of truth, but they vary in their accuracy and focus. Here’s an analysis of each:

  1. Glucose is made during photosynthesis. - True. Glucose is indeed produced during the process of photosynthesis in plants, where carbon dioxide and water are converted into glucose and oxygen using sunlight.

  2. The energy in sunlight is temporarily stored in glucose before it is transferred to ATP. - True. During photosynthesis, light energy is converted into chemical energy in the form of glucose. This glucose can then be broken down in cellular respiration to produce ATP, which is the usable form of energy for cells.

  3. ATP is the energy-carrying molecule that cells use for energy. - True. ATP (adenosine triphosphate) is widely recognized as the primary energy carrier in cells, providing the energy necessary for various cellular functions.

  4. The processes that make ATP and glucose also recycle oxygen in Earth's atmosphere. - True, in a broad sense. Photosynthesis releases oxygen into the atmosphere as a byproduct, and the respiration processes that produce ATP use oxygen, thereby contributing to the cycling of oxygen in the environment.

Given this analysis, all four statements are indeed true in their context regarding glucose and ATP.