Question

4 Why is the nucleus called the control room of the cell?
5. Why is the plasma membrane called selectively permeable?​

Answer 1

Answer:

1. (a)Contains genetic information for structure, reproduction , development, metabolism and behaviour

(b) Controls cellular activities through directing synthesis of particular proteins and enzymes.

2. Plasma membrane called a selectively permeable membrane because it regulates the movement of substances from within to outside of the cell. This means that the plasma membrane allows the entry of some substances while preventing the movement of some other substance.

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Answer 2

Explanation:

4) Nucleus is called the control room of a cell because it controls all the activities of a cell and it is also called the brain of the cell.

5) Plasma membrane is called selectively permeable because it allows only few substances to get in or out of the cell.