Lecture 7: Microbial Metabolic Diversity (CLHT) Flashcards
1
Q
Aerobic Chemolithoheterotrophs
A
- Organism that breaks down inorganic molecule to make ATP
- Oxidize inorganic molecule
- Use electron transport chain and chemiosmosis
2
Q
Sulfur-oxidizing bacteria EX Acidithiobacillus
A
- Aerobic CLHT
- Gram negative rods and spiral
- Inhabit aquatic or terrestrial
- Oxidize compounds with sulfur
- Oxygen is terminal electron acceptor
3
Q
Nitrifier bacteria EX Nitrosomonas
A
- Gram negative
- Inhabit soil
- Oxidize nitrogen compounds
- Terminal electron acceptor is oxygen
- Aerobic CLHT
4
Q
Hydrogen-oxidizing bacteria EX aquifex
A
- Gram negative
- Oxidize hydrogen
- Oxygen is terminal electron acceptor
- Aerobic CLHT
5
Q
Anaerobic CLHT
A
- Breakdown inorganic molecule
- Electron acceptor is something other than O2
6
Q
Methanogens
A
- Archaea
- Inhabit mammal guts and environment
- Oxidize hydrogen gas
- CO2 terminal electron acceptor
- Anaerobic CLHT
7
Q
Oxygenic phototrophs
A
- Bacteria capable of doing photosynthesis
- Contain photosystems 2 and 1
- Contain thylakoid membrane
8
Q
Cyanobacteria EX Anabena
A
- Gram negative
- Uni/Multicellular
- Trichomes are sheaths that hold plant together
- Earliest oxygenic phototrophs
- Some species fix nitrogen and have heterocysts
9
Q
Heterocyst
A
- Where nitrogen fixation occurs
- Contains nitrogenase enzyme that breaks down triple covalent bond
- O2 destroys nitrogenase
