Question

A protein is made and inserted into the membrane of the rough endoplasmic reticulum. A binding site that is present in this protein is aligned so that it faces the lumen of the ER. If this protein is then moved to other endomembranes, at which surface of the membranes given below is this binding site unlikely to be found? A. the internal face of the Golgi apparatus membranes B. the internal face of a lysosome membrane C. facing the intermembrane space of the nuclear envelope membranes D.the lumen face of a vesicle just derived from the Golgi apparatus • E. the cytosolic face of the plasma membrane

Answer 1

Answer:

E

Explanation:

A protein is made and inserted into the membrane of the rough endoplasmic reticulum. A binding site that is present in this protein is aligned so that it faces the lumen of the ER. If this protein is then moved to other endomembranes, the binding site is unlikely to be found at the cytosolic face of the plasma membrane whose main function is to protect the cell from its surroundings.