Prokaryotic cells

All prokaryotic cells dont have membrane bound organelles and are smaller than eukaryotic cells

Structures and roles: 

Cell wall -

• Made up of murein
• Physical barrier that excludes certian substances
• Protects against mechanical damage and osmotic lysis

Capsule -

• Made up of mucilaginous slime
• Protects bacterium from other cells
• Helps groups of bacteria to stick together for further protection

Plasma membrane -

• Acts as a differentially permeable layer
• Controls the entry and exit of chemicals

Circular DNA -

• Possesses the genetic information for the replication on bacterial cells

Plasmid -

• Reproduce themselves independently and may give the bacterium resistance to harmful chemicals, such…