Which of the following Cell organelles has the electron transport system ?

Options

A. Organelle related to the oxidation of carbohydrates
B. Organelle related to the synthesis of food
C. Organelle related to the degradation of food
D. (a) and (b) both

Answer

To solve the question "Which of the following cell organelles has the electron transport system?" we will analyze the options provided and determine which organelles are involved in the electron transport chain (ETC).

### Step-by-Step Solution:

1. **Understanding Electron Transport System (ETS):**
- The electron transport system (also known as the electron transport chain) is a series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions. This process is crucial for ATP production in cellular respiration.

2. **Analyzing the Options:**
- **Option A:** Organelle related to the oxidation of carbohydrates.
- The mitochondria are known as the powerhouse of the cell and are responsible for the oxidation of carbohydrates through cellular respiration. The electron transport chain occurs in the inner membrane (cristae) of the mitochondria.

- **Option B:** Organelle related to the synthesis of food.
- Chloroplasts are the organelles responsible for photosynthesis in plants. The light reactions of photosynthesis involve an electron transport chain that helps in synthesizing ATP and NADPH.

- **Option C:** Organelle related to the degradation of food.
- Lysosomes are involved in breaking down waste materials and cellular debris but do not have an electron transport chain.

- **Option D:** A and B both.
- Since both mitochondria (option A) and chloroplasts (option B) contain electron transport systems, this option is valid.

3. **Conclusion:**
- The correct answer is **Option D**, as both mitochondria and chloroplasts have electron transport systems.

### Final Answer:
**D) A and B both.**