2025 · Q93
Why does the Rough Endoplasmic Reticulum look 'rough' under a microscope?
General KnowledgeBiology
- ADue to the presence of ribosomes on its surface
- BDue to the absence of ribosomes on its surface.
- CDue to the presence of lysosomes on its surface
- DDue to the presence of mitochondria on its surface
Explanation
The rough endoplasmic reticulum appears rough because its cytoplasmic surface is studded with ribosomes, which synthesise proteins that enter the ER lumen. Lysosomes and mitochondria are separate organelles and are not attached to the ER surface. The smooth ER, which lacks ribosomes, instead synthesises lipids and detoxifies harmful substances.