Which organelle is primarily responsible for producing the enzymes secreted by intestinal cells?

• A. Mitochondria
• B. Rough endoplasmic reticulum
• C. Nucleus
• D. Chloroplasts

Answer: (B)

Verified step by step guidance

1. Understand the function of each organelle listed in the question: Mitochondria are responsible for energy production (ATP synthesis), the nucleus contains genetic material and regulates cellular activities, chloroplasts are involved in photosynthesis, and the rough endoplasmic reticulum (RER) is involved in protein synthesis and modification.
2. Recall that enzymes are proteins, and their synthesis requires ribosomes. The rough endoplasmic reticulum is studded with ribosomes, making it the primary site for the synthesis of proteins, including enzymes.
3. Consider the context of intestinal cells, which secrete enzymes to aid in digestion. These enzymes are synthesized as proteins in the rough endoplasmic reticulum before being transported to their destination.
4. Understand the role of the rough endoplasmic reticulum in modifying and folding proteins into their functional forms. This ensures that the enzymes are properly structured for their biological activity.
5. Conclude that the rough endoplasmic reticulum is the organelle primarily responsible for producing the enzymes secreted by intestinal cells, as it is directly involved in protein synthesis and processing.