nucleoplasm.pptx

science biology about nucleoplasm , what is nucleoplasm

1. nucleoplasm

2. What is Nucleoplasm or nuclear matrix ? It is a transparent semi-fluid and colloidal substance which fills the nucleus. It contains the nucleolus and chromatin. Some of the protein in nucleoplasm are essential for spindle formation.

3. nucleolus Nucleoli are spherical structures present in the nucleoplasm. It is a non membrane bound structure. Site of active ribosomal rna synthesis. Nucleolus stores nucleoproteins.

4. Difference between nucleoplasm and cytoplasm cytoplasm nucleoplasm It lies outside the nucleus. It lies inside the nucleus Single membrane envelope Double membrane envelope. Possesses cell organelles Possesses chromatin , matrix and nucleolus. Contains Endomembranes . Endomembranes are absent

5. chromatin Nucleus has a loose and indistinct network of nucleoprotein fibres called chromatin. Chromatin occurs in the form of fine overlapping and coiled fibres which appear to produce a network called chromatin reticulum. Chromatins are of two types euchromatin and hetero chromatin.

6. chromosome . Chromosomes are thread like structures made up of dna and histones proteins. during different stages of cell division, cells show structured chromosomes in place of the chromatin A human cell has 23 pairs of chromosomes.

7. Difference between chromatin and chromosomes Chromatin chromosomes Uncondensed Condensed Observable in the interphase nucleus. Observable during nuclear division. It is active in controlling metabolism and other activities of the cell. Chromosomes are mainly meant for distribution of genetic information to the daughter cells.