Practice question · Sort into groups
Sort each function by the organelle that performs it.
Groups: Rough ER · Smooth ER · Lysosome
- Detoxification of drugs and toxins
- Lipid and steroid synthesis
- Folding of newly made proteins with chaperones
- Synthesis of secreted and membrane proteins
- Digestion of worn-out organelles
Hints
- The presence or absence of ribosomes divides the two ER types.
- Anything involving digestion belongs to the lysosome.
Show the answer
Rough ER: Synthesis of secreted and membrane proteins, Folding of newly made proteins with chaperones
Smooth ER: Lipid and steroid synthesis, Detoxification of drugs and toxins
Lysosome: Digestion of worn-out organelles
Why
The two ER types share a membrane system but do quite different work, distinguished by their ribosomes. Lysosomal digestion of the cell’s own organelles is autophagy, recycling that also removes damaged components.
Practise The Endomembrane System
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