What occurs in glycolysis

Options

A. Fixation
B. Reduction
C. Dehydrogentaion
D. Oxidation.

Answer

### Step-by-Step Solution:

1. **Definition of Glycolysis**: Glycolysis is the metabolic pathway that converts glucose into pyruvate, which is a crucial step in cellular respiration.

2. **Location**: Glycolysis occurs in the cytoplasm of the cell, making it accessible for cellular processes.

3. **Oxygen Requirement**: This process is anaerobic, meaning it does not require oxygen to occur.

4. **Conversion Process**: During glycolysis, one molecule of glucose (a six-carbon sugar) is broken down into two molecules of pyruvate (a three-carbon compound).

5. **Energy Production**: The breakdown of glucose during glycolysis results in the production of energy, which is stored in the form of ATP (adenosine triphosphate).

6. **Chemical Nature**: The process of glycolysis involves the oxidation of glucose, as electrons are removed from glucose molecules during the conversion to pyruvate.

7. **Final Products**: The end products of glycolysis include pyruvate, ATP, and NADH (another energy carrier), which can be further utilized in subsequent stages of cellular respiration.

8. **Conclusion**: Therefore, the correct answer to the question "What occurs in glycolysis?" is that it is primarily an oxidation process.