Question

Which option correctly describes the structure of the nucleus?

a) Contains genetic material in the form of DNA and RNA
b) Surrounded by the cell membrane
c) Site of protein synthesis
d) Controls cell activities and houses genetic material

Answer 1

The nucleus controls cellular activities and houses genetic material, encased within a double-layered nuclear envelope that contains nuclear pores, and features nucleoli for ribosome synthesis.

Step-by-step explanation:

The correct option that describes the structure of the nucleus is d) Controls cell activities and houses genetic material. The nucleus is often referred to as the command center of the cell because it contains most of the cell's genetic information and is responsible for maintaining the integrity of these genes and controlling the activities of the cell by regulating gene expression. It is encased within a nuclear envelope, which consists of two interconnected lipid bilayers, and features protein-lined pores known as nuclear pores that regulate traffic into and out of the nucleus. Inside, the nucleus contains one or more nucleoli, which are responsible for ribosome synthesis. The DNA within the nucleus exists as chromatin, a loose structure that condenses into chromosomes when the cell is about to divide.