Why are Lysosomes Considered Part of the Endomembrane System

Question

Why are lysosomes considered part of the endomembrane system?
A) They deposit end- products of digestion in the endoplasmic reticulum.
B) Lysosomes are not part of the endomembrane system.
C) They facilitate movement between stacks of the Golgi.
D) They are formed from products synthesized by the endoplasmic reticulum and processed by the Golgi.

Accepted Answer

Lysosomes are formed from products synthesized by the endoplasmic reticulum and processed by the Golgi, hence they are considered part of the endomembrane system. Option A is incorrect because lysosomes do not deposit end-products of digestion in the endoplasmic reticulum. Option B is incorrect because lysosomes are indeed part of the endomembrane system. Option C is incorrect because lysosomes do not facilitate movement between stacks of the Golgi, rather they contain enzymes that break down and recycle cellular waste.