Ribosomes, endoplasmic reticulum, and the Golgi apparatus functionally act in sequence to synthesize and modify proteins for secretory use (export) only, never for use by the cell. This statement is ________.
A) false; proteins thus manufactured are for use inside the cell only
B) false; integral cell membrane proteins are also synthesized this way
C) false; lipids, not proteins, are synthesized this way
D) true
Answer: B