Conceptual Notes
Cell types (mainly based on nuclear composition)
Sr. Eukaryotic Cell Prokaryotic Cell
No. Eu=True Pro=Primitive
Karyon=Nucleus Karyon= Nucleus
(Nucleoid)
1. True/well defined nucleus True Nucleus -nt (absent)
+nt (present) • Nuclear
• Nuclear membrane/nuclear
membrane/nuclear envelope/karyotheca -nt
envelope/karyotheca • Nucleolus -nt
+nt • Histone protein -nt in
• Nucleolus +nt eubacteria
• Histone protein +nt
2. Chromosomal DNA- Nucleoid DNA/
• More amount prochromosomal DNA-
• Linear • Small amount
• Associated with histone • Circular, except-
protein mycoplasma
• AT rich
Cell types (mainly based on nuclear composition)
Sr. Eukaryotic Cell Prokaryotic Cell
No. Eu=True Pro=Primitive
Karyon=Nucleus Karyon= Nucleus
(Nucleoid)
1. True/well defined nucleus True Nucleus -nt (absent)
+nt (present) • Nuclear
• Nuclear membrane/nuclear
membrane/nuclear envelope/karyotheca -nt
envelope/karyotheca • Nucleolus -nt
+nt • Histone protein -nt in
• Nucleolus +nt eubacteria
• Histone protein +nt
2. Chromosomal DNA- Nucleoid DNA/
• More amount prochromosomal DNA-
• Linear • Small amount
• Associated with histone • Circular, except-
protein mycoplasma
• AT rich