Question

The cell organelle primarily responsible for the source of reactive oxygen species is:

• A. Nucleus
• B. Endoplasmic reticulum
• C. Golgi apparatus
• D. Mitochondria

Hint:

Mitochondria are the primary source of reactive oxygen species due to oxidative phosphorylation.

Answer 1

The Correct Option is D

Step 1: Understanding Reactive Oxygen Species (ROS) 
Mitochondria are the primary site of cellular respiration, and during ATP production, they generate reactive oxygen species (ROS) as byproducts. Step 2: Evaluating the Options 
- Nucleus: Involved in genetic processes, but not the primary source of ROS. 
- Endoplasmic reticulum: Some ROS are generated, but mitochondria are the main source. 
- Golgi apparatus: Not directly involved in ROS production. 
- Mitochondria: Correct, mitochondria are the major source of ROS due to oxidative phosphorylation. 
Step 3: Conclusion 
Mitochondria are the major source of reactive oxygen species in cells.