The proteins and lipids, essential for building the cell membrane, are manufactured by
(a) rough endoplasmic reticulum
(b) golgi apparatus
(c) plasma membrane
(d) mitochondria
Answer : (a)
The smooth endoplasmic reticulum helps in the manufacture of fat molecules, or lipids, important for cell function.
The rough endoplasmic reticulum helps in the manufacture of proteins.
Therefore, option (a) is correct.