Question

Explain each point– nucleolus, chromatin, nucleoplasm, nuclear membrane and nuclear pores. Give their one function.

Answer 1

Nucleolus is a small dense spherical structure in the nucleus of a cell during interphase. It is is the largest structure in the nucleus of eukaryotic cells. It is best known as the site of ribosome biogenesis.
FUNCTION : To rewrite ribosomal RNA (rRNA) and combine it with proteins.

Chromatin is a complex of macromolecules found in cells, consisting of DNA, protein and RNA
FUNCTION : To package DNA into a more compact, denser shape

Nucleoplasm is one of the types of protoplasm, and it is enveloped by the nuclear membrane(also known as the nuclear envelope). The nucleoplasm includes the chromosomes and nucleolus.
FUNCTION : To serve as a suspension substance for the organelles inside the nucleus. It also helps maintain the shape and structure of the nucleus, and plays an important role in the transportation of materials that are vital to cell metabolism and function.

Nuclear membrane is the membrane that encloses the nucleus. This bilayer membrane is made of lipids, and encases the genetic material in eukaryotic cells.
FUNCTION : Its basic function is to protect the nucleus

Nuclear pores is a large complex of proteins that allows small molecules and ions to freely pass, or diffuse, into or out of the nucleus.
FUNCTION : It allow necessary proteins to enter the nucleus from the cytoplasm if the proteins have special sequences that indicate they belong in the nucleus.