Anaerobic process after glycolysis is known as

Options

A. TCA cycle
B. Krebs cycle
C. Calvin cycle
D. None of the above

Answer

To solve the question regarding the anaerobic process that occurs after glycolysis, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Glycolysis**: Glycolysis is the first step in cellular respiration where glucose is broken down into pyruvate, producing a small amount of ATP and NADH. This process occurs in the cytoplasm and does not require oxygen.

2. **Identify the Conditions**: After glycolysis, if oxygen is present, the pyruvate will enter the mitochondria and undergo aerobic respiration (TCA cycle/Krebs cycle). However, if oxygen is absent, the cell must rely on anaerobic processes.

3. **Explore Anaerobic Processes**: In the absence of oxygen, cells can undergo anaerobic respiration. In animals, this process is known as lactic acid fermentation, where pyruvate is converted into lactic acid. In yeast and some bacteria, alcoholic fermentation occurs, converting pyruvate into ethanol and carbon dioxide.

4. **Evaluate the Options**: The question provides options:
- TCA cycle
- Krebs cycle
- Kelvin cycle
- None of the above

- The TCA cycle and Krebs cycle are synonymous and occur in the presence of oxygen, so they are not correct.
- The Kelvin cycle is related to photosynthesis and carbon fixation in plants, not respiration, so it is also incorrect.

5. **Conclude the Answer**: Since none of the provided options correctly identify the anaerobic process after glycolysis, the correct answer is "None of the above." The anaerobic process after glycolysis is lactic acid fermentation.

### Final Answer:
The anaerobic process after glycolysis is known as **None of the above**.

---