Prokaryotic cell ;
Cell wall - present in most but in all cells
Plasma membrane - present
Nucleus - Absent
Nuclear membra - Absent
Chromatin with histone - Absent
Genetic material - Circular or linear , double stranded DNA : genes are not interrupted by intron
Nucleoli and mitotic apparatus - Absent
Plasmids - commonly present
CELLULAR ORGANELLES :
1. Mitochondria - Absent
2. Endoplasmic reticulum - Absent
3. Vacuoles - Absent
4. Lysosome - Absent
5. Chloroplasts - Absent
6. Centrioles - Absent
7. Ribosomes - present ( 70S )
8. Microtubules - Absent
9. Flagella - Simple structure composed of the protein flagellin
Respiration - Many strict anaerobes
( Oxygen fatal )
Metabolic patterns - Great variations
Sexual system - Rare : if present one way ( and usually partial ) ; transfer of DNA from donor to recipient cell occurs.
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