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Nuclear membrane
The nucleus is enclosed by a double layered cellular membrane called the nuclear membrane.
Nucleoplasm
The nucleus contains a nuclear sap, enclosed by the nuclear envelope, which is known as the nucleoplasm. This holds the nucleoli and suspends the chromatins.
Nucleolus
The nucleolus is a sub-organelle present inside the nucleus. It can be observed as a dark spot under the microscope.
Nucleoli are made up of proteins, ribosomal RNA (rRNA), and ribosomal DNA (rDNA).
Chromatin network
DNA gets associated with protein molecules to form chromatins.
Chromatins are present in the nucleoplasm.