Question

1. which of the following cellular components is not part of the endomembrane system?

a. vacuoles
b. golgi apparatus
c. endoplasmic reticulum
d. mitochondria

Explanation:

The endomembrane system includes the nuclear envelope, endoplasmic reticulum, Golgi apparatus, lysosomes, vacuoles, and the plasma membrane. Mitochondria are not part of this system as they have their own distinct functions (like energy production through cellular respiration) and are not directly involved in the membrane - related processes (such as protein and lipid synthesis, modification, and transport) that the endomembrane system is responsible for.

Answer:

D. Mitochondria