Final answer:
The nucleus is a spherical organelle surrounded by the nuclear membrane. It contains DNA organized into chromatin and is involved in controlling cell functions.
Step-by-step explanation:
Structure and Features of the Nucleus
The nucleus is a spherical organelle that contains many structures, including the nucleolus. It is surrounded by the nuclear membrane, which has protein-lined pores that allow materials to move in and out.
Contents of the Nucleus
The nucleus contains DNA, which is organized into chromatin, a complex of DNA and proteins. It also contains the nucleolus, a condensed region where ribosomes are formed.
Functional Features of the Nucleus
The nucleus controls many cell functions, such as protein synthesis, by controlling gene expression. It is the site of DNA/RNA synthesis and protein assembly. During cell division, chromatin can condense into chromosomes.