Question

3. The plasma membrane is called semi-permeable:
i) It allows the entry of selective substances.
ii) It does not allow entry of any substances.
iii) It allows the exit of selective substances.
iv) It allows entry only.
a) It does not allow entry of any substance and it allows the exit of selective
substances are correct.
b) All of these.
c) It allows the entry of selective substances, it does not allow entry of any
substance and it allows the exit of selective substances are correct.
d) It allows the entry of selective substances and it allows the exit of selective
substances are correct.​

Answer 1

Explanation:

The plasma membrane is called as selectively permeable membrane because it regulates the movement of substances in and out of the cell. It means that the plasma membrane allows some material to pass through it while at the same time it blocks other material from entering through it.