Answer:
Option D, layer energy conservation
Explanation:
Cytoplasmic membrane is a permeable layer and hence option B is incorrect. It is the cell membrane that gives a rigid shape to the cell, hence option C is incorrect. Carbohydrates are anchored by cell membrane. Hence, option A is also not correct. Cytoplasmic membrane is the inner layer of cytoplasm which releases numerous vesicles into the periplasmic space and also engulfs it. They anchor ATP molecules and thereby conserve energy.
Hence, option D is correct
