The nucleolus is a dense spot in the nucleus where components of ribosome are assembled.
The double membrane layer however that stores and safeguards DNA is located in the nucleolus, which is the region of the nucleus wherein ribosomes are put together.
The nuclear envelope, nucleoplasm, meaning nucleus sap, nuclear matrix, chromatin, as well as nucleolus include some of the several structures that make up the nucleus. The nuclear membrane, also referred to as the nuclear envelope, creates an envelope-like structure surrounding the nuclear contents.
Therefore, the nucleolus is a dense spot in the nucleus where components of ribosome are assembled.
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