alleryStart learning →From which membranes are lysosomes formed?
AFrom the nuclear envelope only
BFrom the plasma membrane only
CFrom the rough ER and the Golgi
DFrom the mitochondrial membranes
Answer & Solution
Correct answer: C. From the rough ER and the Golgi
1. Lysosomes are counted as parts of the endomembrane system.
2. Membership of that system means they are supplied by the same membrane traffic as the rest of it.
3. Lysosomes are created by the budding of the membranes of the rough ER and the Golgi.
4. That origin explains why their hydrolytic enzymes, which are proteins, are made and processed along the same route.
5. Mitochondrial membranes are excluded from the endomembrane system, so they cannot supply lysosomes.
6. Lysosomes bud from the rough ER and the Golgi.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 4 "Cell Structure", section 4.4 The Endomembrane System and Proteins_
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