Describe the nucleus. What can be found inside of it?

Expert Solution

In an eukaryotic cell, the nucleus is a membrane bound organelle that contain most of the genetic material of a cell. An eukaryotic cell has a single nucleus, but in cells such as red blood cells, nucleus is not present. Some cells such as human skeletal muscle cells and fungi have more than one nucleus.

The nucleus consists of nuclear envelope, pores, nucleoplasm, nuclear lamina, chromosomes, nucleolus and subnuclear bodies.

Nuclear envelope - The nuclear envelope encloses the nucleus and separates the cell's genetic material from the surrounding cytoplasm.
Pores - Nuclear pores are aqueous channels through the envelope, into which molecules diffuse.
Nucleoplasm - Nucleoplasm is the viscous liquid found inside a nucleus that is similar in composition to the cytosol found outside the nucleus.
Nuclear lamina - The nuclear lamina forms a meshwork on the internal face of the envelope that provides mechanical suppot to the nucleus.
Chromosomes - The majority of genetic material of a cell is in the form of multiple linear DNA molecules organized into structures called chromosomes.
Nucleolus - The nucleolus synthesizes rRNA and assembles ribosomes.
Subnuclear bodies - Subnuclear bodies of the nucleus include Cajal bodies, Gemini of coiled bodies, polymorphic interphase karyosomal association (PIKA), promyelocytic leukaemia (PML) bodies, paraspeckles, and splicing speckles.

gladiator answered 2 years ago

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