• Bacteria vs. Cheek cells

Bacterial structures - basic principle

Bacterial capsule Capsule is a polysaccharide, protective layer outside the cell wall; the background and the bacterium pick up the dye and appear darker; capsule does not pick up the dye and appears lighter halo around the bacterial cell Capsule Bacterial cell Capsule is a polysaccharide, protective layer outside the cell wall; the background and the bacterium pick up the dye and appear darker; capsule does not pick up the dye and appears lighter halo around the bacterial cell

Bacterial endospore Endospore is a dormant, tough, non-reproductive structure produced by some bacteria to survive during extreme environmental conditions Endospore is a dormant, tough, no-reproductive structure produced by some bacteria to survive during extreme environmental conditions

Bacterial flagella Bacterial cell Flagella Flagella covering the entire bacterial surface Hair-like structure that helps in the movement of bacterium; made of helical protein (flagellin) attached to the basal body for rotary movement