L2 Diversity of Bacteria Flashcards
Describe the range of bacterial sizes
Typical bacteria 0.5 - 5 um. (1 x 10 -6). ecoli about 1um.
Describe the range of bacterial shapes
Spirals, rods, filaments, spirals.
Describe some ways in which bacteria may associate
What is gram positive bacteria?
Purple. Dye = crystal violet. Less peptidoglycan.
What is gram negative bacteria?
Pink. Dye = Safranin/Fuchsin. More peptidoglycan. More antibiotic resistant as there are more layers to get through.
Describe the diversity of microbial metabolism and habitats
Soil -
Human cells -
Deep sea hydrothermal vent -
Energy Source
- Phototrops - light
- Chemotrophs - iron, hydrogen, glucose, acetate etc.
Electron Source
- Lithotrophs - reduced inorganic molecules
- Organotrophs - Organic molecules.
Carbon Source
- Autotrophs - CO2 as sole/principle source.
- Heterotrophs - preformed organic molecules.
Comment on your knowledge of microbial diversity
Energy Source
- Phototrops
- Chemotrophs
Electron Source
- Lithotrophs - reduced inorganic molecules (eaters of rock)
- Organotrophs - Organic molecules.
Carbon Source
- Autotrophs - CO2 as sole/principle source.
- Heterotrophs - preformed organic molecules.
What are histones?
What are introns?
What are exons?
Take away about gram staining?
it represents diff levels of organisation in the bacterial envelope.
what is a facultative anaerobe?
What is an obligate anearobe?
Microbe that survives in low oxygen levels. Like e-coli in our colon. high levels of oxygen would be poisonous to it.
Fun: what is a subglacial Lake?
