Which of the following regulates the entry of certain solutes and ions inside the cell?
Answer
Correct Answer : a ) Plasma Membrane
Explanation :The cell wall is freely permeable allowing the substance in solution to enter and leave the cell without hindrance whereas the permeability of the plasma membrane is selective i.e. it allows only certain substances to pass through while it prevents the others.
A ribosome is made of both RNA and protein, and it is the site of protein synthesis in the cell. The endoplasmic reticulum (ER) is a large, dynamic structure that serves many roles in the cell including calcium storage, protein synthesis and lipid metabolism.
Hence, option (a) is correct.
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