This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Cells involved in active protein synthesis have- 
Select and explain. 
A. Increased mitochondria, B. Increased Rough Endoplasmic reticulum, C. Increased golgi apparatus, D. Increased lysosomes
B: Increased Rough Endoplasmic reticulum
Answer: B: Increased Rough Endoplasmic reticulum 
Explanation: In Rough endoplasmic reticulum, ribosomes are attached. Protein synthesis can occur in ribosomes and mitochondria. So the answer to this question would be rough endoplasmic reticulum.