What types of proteins are synthesized by the rough ER?
A) ribosomal proteins
B) soluble cytosolic proteins
C) mitochondrial proteins
D) lysosomal proteins

Question

Quizplus · Accepted Answer

The rough endoplasmic reticulum (ER) is responsible for synthesizing proteins that are destined to be secreted or localized to the membranes or lumen of organelles. Lysosomal proteins are one such class of proteins that are synthesized by the rough ER and then transported to lysosomes for their function. Ribosomal proteins are synthesized by ribosomes in the cytosol and not by the rough ER. Similarly, soluble cytosolic proteins are synthesized in the cytosol and do not require the rough ER for their synthesis. Mitochondrial proteins are synthesized in the cytosol and are then transported to mitochondria for their function.

What Types of Proteins Are Synthesized by the Rough ER