1. It is a cell organelle.

2. Nucleus has nuclear membrane, nucleoplasm, chromatin network and nucleolus.

3. Most of the eukaryotic cells contain one nucleus.


4. Nucleus contains enzymes, Mn++, Mg++ in traces nucleotides and ribosomes in its nucleoplasm.


1. It is present in the nucleus.

2. Choromosomes have two chromatids, which are held at cetromere.


3. Chromosomes are present in fixed numbers in a nucleus.

4. Chromosomes contain histone proteins and DNA more or less in equal proportion.