The ATP molecule shown is the universal energy source for cellular activities.Which of these processes is used to break down glucose into ATP that is usable by the cell? A chemosynthesis B photosynthesis C respiration D transpiration

## Step 1<br />The question is asking about the process that breaks down glucose into ATP (adenosine triphosphate), which is a form of energy that cells can use. <br /><br />## Step 2<br />Let's analyze each option:<br /><br />### A. Chemosynthesis<br />This is a process used by certain organisms to produce food without the need for sunlight. Instead, they use chemicals as a source of energy. This process does not involve the breakdown of glucose into ATP.<br /><br />### B. Photosynthesis<br />This is the process by which plants, algae, and some bacteria convert sunlight, water, and carbon dioxide into glucose and oxygen. While glucose is produced in this process, it is not directly converted into ATP.<br /><br />### C. Respiration<br />This is the process by which cells break down glucose and other molecules to produce ATP. This is the correct answer because it is the process that directly converts glucose into ATP.<br /><br />### D. Transpiration<br />This is the process by which water is moved through plants and its evaporation from aerial parts, such as leaves, stems, and flowers. This process does not involve the breakdown of glucose into ATP.