2019 · Q7
Rough endoplasmic reticulum (RER) looks rough under the microscope because of the attachment of which one of the following cell organelles to its surface?
general-sciencebiology-human-body
- ACentrioles
- BPlastids
- CLysosomes
- DRibosomes
Explanation
The rough endoplasmic reticulum is studded with ribosomes on its cytoplasmic surface, which gives it the 'rough' appearance under the electron microscope. These ribosomes synthesise proteins that enter the ER lumen for folding and transport. Centrioles, plastids and lysosomes are not attached to the ER, so the answer is D.