3.2.1.2 Structure of prokaryotic cells and of viruses

Murein

Makes up cell walls of prokaryotes and is a glycoprotein

component of cell that lacks membrane-bound organelles

cytoplasm

Prokaryote ribosomes

Smaller ribosomes (70S rather than 80S)

Prokaryotic DNA

-Circular loop of DNA , free in cytoplasm and no histones

plasmids

small loops of DNA

Flagella

Used for locomotion in a prokaryote

Capsule

Surrounds a prokaryotic cell and prevents it from drying out

Viruses are acellular and non living

Having no cellular structure and not a living organism

Structure of a virus

-genetic material (DNA or RNA)

-protein capsid

-attachment protein

(protein coat)