Organisation Of Prokaryotic Cells Flashcards
0
Q
What are the cell walls of bacteria composed of?
A
Peptidoglycan.
1
Q
What are cytoplasmic ‘inclusions’ in bacteria?
A
These are non membrane bound yet distinct areas of the cell. Examples are:
Gas vesicles surrounded by a protein shell. They play a role in the buoyancy of some aquatic bacteria.
Endospores: dormant structures which can later germinate to produce a new individual.
Glycogen granules: energy reserves.
2
Q
What is the difference between gram-positive & gram-negative bacteria?
A
The peptidoglycan layer (cell wall) is much thicker in gram-positive bacteria.
3
Q
Describe the cell wall of gram-negative bacteria (compared to gram-positive).
A
They have a much thinner peptidoglycan layer and a periplasmic space between inner and outer membranes.
