THE CELLULAR ORGANELLES

A Comparison of   Prokaryotic, animal, and Plant Cells

	Prokaryote*	Animal*	Plant*
Exterior Structures
Cell wall	Present (protein-polysacharide	Absent	Present (cellulose)*
Cell membrane	Present	Present	Present
Flagella/cilia	Flagella may be present	May be present (9+2 structure)	Absent except in sperm of a few species (9+2 structure)
Interior Structures
Endoplasmic reticulum (ER)	Absent	Usually present	Usually present
Ribosomes	Present	Present	Present
Microbules	Absent	Present*	Present
Centrioles	Absent	Present	Absent
Golgi apparatus	Absent	Present	Present
Nucleus	Absent^	Present	Present
Mitochondria	Absent	Present	Present
Chloroplasts	Absent	Absent	Present*
Chromosomes	Single; circle of DNA	Multiple; DNA –protein complex	Multiple; DNA – protein complex
Lysosomes	Absent	Usually present	Present
Vacuoles	Absent	Absent or small	Usually a large single vacuole*