Identify the step which belong to the Kreb's cycle.

Options

A. Pyruvate is converted to Acetyl CoA
B. Release of GTP on conversion of succinyl-CoA to succinate
C. Passing on of the electrons removed as part of the hydrogen atoms to molecular oxygen with simultaneous svnthesis of ATP
D. All of these

Answer

To identify the step that belongs to the Krebs Cycle (also known as the Citric Acid Cycle or TCA Cycle), let's analyze the provided options step by step.

### Step 1: Understand the Krebs Cycle
The Krebs Cycle is a series of chemical reactions used by all aerobic organisms to generate energy. It involves the oxidation of acetyl-CoA to carbon dioxide and water, while capturing energy in the form of ATP, NADH, and FADH2.

### Step 2: Analyze the Options
1. **Pyruvate is converted into Acetyl-CoA**: This reaction occurs before the Krebs Cycle during the process of glycolysis and is not part of the Krebs Cycle itself.

2. **Release of GTP on conversion of Succinyl-CoA to Succinate**: This is a specific step in the Krebs Cycle. During this step, Succinyl-CoA is converted into Succinate, and GTP (or ATP) is released as a product.

3. **Passing on of the electrons removed as a part of Hydrogen atom to Molecular Oxygen with simultaneous synthesis of ATP**: This description refers to the electron transport chain, which occurs after the Krebs Cycle, not within it.

4. **All of these**: This option implies that all the previous statements are part of the Krebs Cycle, which is incorrect.

### Step 3: Conclusion
Based on the analysis:
- The only step that belongs to the Krebs Cycle is the **release of GTP on conversion of Succinyl-CoA to Succinate**.

### Final Answer
The correct answer is the second option: **Release of GTP on conversion of Succinyl-CoA to Succinate**.

---