T3L2 Prokaryotic cell ultrastructure Flashcards
Name the 10 features of a prokaryotic cell
Pilli/Fimbrae
Capsule
Cell Wall
Plasma membrane
Mesosome
Cytoplasm
Ribosome
Plasmid
Circular DNA in a nucleoid
Flagellum
Are all structures present in every prokaryote
NO
Describe fimbrae/pilli
Protein tubes on the outside of a prokaryote - for adhesion to surfaces
Describe the capsule
A slimy layer on the surface of the prokaryote
For protection and to prevent dehydration (there are many functions that range)
Describe the cell wall
Contains peptidoglycan a polypeptide+polysaccharide COMBINED
Describe how DNA is found in a prokaryotic cell
Mainly in a circular strand of DNA (found in a nucleoid)
Also found in plasmids (DNA rings) that can be exchanged between bacteria (conjugation)
What is a mesosome
an infolding of the cell surface membrane where respiration occurs