6.2 Cause of Death (Bacteria) Flashcards
1
Q
Bacteria (Overview)
A
Bacteria
Prokaryotic Cell
* No nucleus * Lack of membrane-bound organelles * Do not produce spindle during cell division * Reproduce asexually by binary fission * After replication of their DNA they divide into two identical cells.
2
Q
Ribosome
A
Site of protein synthesis ; occurs free in the cytoplasm
3
Q
Capsule
A
Mucus layer for protection and to prevent dehydration
4
Q
Pilus (Plural Pili)
A
Protein tubes that allow bacteria to attach to surfaces. Involved in cell-to cell attachment.
5
Q
Plasmids
A
Small circles of DNA
6
Q
Mesosome
A
Infolding of the cell surface membrane. Site of cell respiration.
7
Q
Flagellum
A
Used for cell movement.
8
Q
Cell Wall
A
Does not contain cellulose. Made of peptidoglycan. Polysaccharide cross-linked by peptide chains.
9
Q
Gram Positive Bacteria
A
Walls are thickened with additional polysaccarides + proteins.
Has peptidoglycan
10
Q
Gram Negative Bacteria
A
Thinner walls but with a surface layer of lipids for protein.
Has peptidoglycan.
