The nucleus is surrounded by a semipermeable membrane. What would happen if this layer were permeable to most substances?

A. The DNA in the nucleus would be protected from harmful substances

B. Enzymes would not be able to speed up reactions in the nucleus.

C. The nucleus would not be able to communicate with the rest of the cell.

D. Large molecules would be able to enter and damage the nucleus.

If the layer of nucleus were permeable to most substance, then the large molecules would be able to enter and damage the nucleus.

What is nucleus?

It is a membrane-bound organelle present in the centre of cell in which thread like structures called chromatins are present which condenses to form chromosomes contains genetic material (that carries genetic information from parents to offspring).
It controls all function of the cell.
The layer or membrane around nucleus is called nuclear membrane is semi-permeable in nature which means that only specific molecules and ions can move across it.
If the membrane would become permeable, then movement of all types of molecules will occur which will disturb the homeostasis (maintaining balance) of cell and can damage the nucleus.

Hence, the correct option is: D. Large molecules would be able to enter and damage the nucleus.

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