Question

Rough endoplasmic reticulum is associated with

• A. Fat synthesis
• B. Steroid synthesis
• C. Protein synthesis
• D. All of the above

Answer 1

The correct option is C Protein synthesis

Rough endoplasmic reticulum (RER) carry ribosomes on their surface and are involved in the process of protein synthesis. The secretory proteins are synthesized on ribosomes which are present on the surface of endoplasmic reticulum. The cytoplasmic proteins are synthesized by cytoplasmic ribosomes. After synthesis on RER, the secretory proteins are pinched off in minute vesicles which carry secretory proteins to the Golgi apparatus. The secretory proteins are processed in the Golgi apparatus and finally secreted on the plasma membrane surface. Conjugate proteins, like glycoproteins are also synthesized in Golgi apparatus.