Question

The RER in the cell synthesises a protein which would be later used in building the plasma membrane. But it is observed that the protein in the membrane is slightly different from the protein made in the RER. The protein was probably modified in another cell organelle. Identify that organelle in the given diagram

• A. D
• B. A
• C. B
• D. C

Answer 1

The correct option is D C

The secretory proteins are synthesized on ribosomes attached to Endoplasmic Reticulum. These proteins enter the lumen of RER and then through vesicles are passed on to Golgi apparatus. In Golgi apparatus, proteins undergo post translational modification like glycosylation, addition of signal peptide etc.