10 Questions
What is the main function of the cell nucleus?
Control of gene expression and mediation of DNA replication
Which type of cells usually lack a cell nucleus?
Mature mammalian red blood cells
What is the main constituent of chromatin?
Genetic material (DNA) and proteins
Where does rRNA synthesis primarily occur within the nucleus?
Nucleolus
What surrounds the nucleus, consisting of inner and outer nuclear membranes?
Nuclear envelope
Which chromosomal regions are involved in the formation of the nucleolus?
Short arms of chromosomes 13, 14, 15, 21 and 22
What is the main function of the nucleolus?
Transcribing ribosomal RNA and combining it with proteins to form incomplete ribosomes
Which part of the nucleolus contains inactive DNA?
Pale staining fibrillar center
Where do maturing ribosomal subunits get assembled in the nucleolus?
Pars granulosa
What migrates into the cytoplasm to participate in protein synthesis?
Small and large ribosomal subunits
Test your knowledge about the structure and function of the cell nucleus, the largest organelle in the cell responsible for controlling gene expression, mediating DNA replication, and more. Learn about the constituents of the nucleus and its variations across different cell types.
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