T3L2 Prokaryotic cell ultrastructure

Question 1

Name the 10 features of a prokaryotic cell

Answer 1

Pilli/Fimbrae
Capsule
Cell Wall
Plasma membrane
Mesosome
Cytoplasm
Ribosome
Plasmid
Circular DNA in a nucleoid
Flagellum

Question 2

Are all structures present in every prokaryote

Answer 2

NO

Question 3

Describe fimbrae/pilli

Answer 3

Protein tubes on the outside of a prokaryote - for adhesion to surfaces

Question 4

Describe the capsule

Answer 4

A slimy layer on the surface of the prokaryote

For protection and to prevent dehydration (there are many functions that range)

Question 5

Describe the cell wall

Answer 5

Contains peptidoglycan a polypeptide+polysaccharide COMBINED

Question 6

Describe how DNA is found in a prokaryotic cell

Answer 6

Mainly in a circular strand of DNA (found in a nucleoid)

Also found in plasmids (DNA rings) that can be exchanged between bacteria (conjugation)

Question 7

What is a mesosome

Answer 7

an infolding of the cell surface membrane where respiration occurs