Questions: Which of the following is not a reaction that cells use to get energy from nutrients? Multiple Choice glycolysis fermentation photosynthesis cellular respiration Krebs cycle

The answer is: photosynthesis.

Explanation for each option:

1. Glycolysis: This is a metabolic pathway that breaks down glucose to produce energy in the form of ATP. It is a fundamental process used by cells to extract energy from nutrients.

2. Fermentation: This is an anaerobic process that allows cells to generate energy from nutrients when oxygen is not available. It is used by many organisms to produce ATP.

3. Photosynthesis: This is a process used by plants, algae, and some bacteria to convert light energy into chemical energy stored in glucose. It is not a process used by cells to get energy from nutrients, but rather to produce nutrients.

4. Cellular Respiration: This is a process that cells use to convert biochemical energy from nutrients into ATP, and it involves glycolysis, the Krebs cycle, and the electron transport chain.

5. Krebs Cycle: Also known as the citric acid cycle, this is a key component of cellular respiration, where energy stored in nutrients is released to produce ATP.

Summary: Photosynthesis is not a reaction that cells use to get energy from nutrients; instead, it is a process to produce nutrients using light energy.