2.15 Micro Flashcards
(23 cards)
What are the 4 functions of a cytoplasmic membrane
Energy metabolism
Transport
Secretion
Signaling
What bac is unusual in the fact that it has no peptidoglycan cell wall and has a cytoplasmic membrane with cholesterol
Mycoplasma pneumoniae
Iron is used to make heme, which is used for
Cytochrome
Catalase
People with hemochromatosis are sensitive to what bac
Vibrio vulnificans
Efflux pumps are important in resistance to what ATB?
Tetracycline
A bac that can make everything when only given glucose and inorganic salts is called a
Prototroph
A bac that needs more growth factors than just glucose and organic salts is called an
Auxotroph
Additional growth factors required for some bac to grow
Vitamins Amino acids Purines / pyramidines Heme NMN
Haemophilus influenzae needs ______ to lyse RBCs to release ______ and ______
Staphylococcus aureus
Heme
NAD or NMN
What bac uses chocolate agar and CO2 to grow
Neisseria meningitidis
MacConkey agar detects
Fermentation
- high sugar (lactose, sorbitol)
- pH
What is in a MacConkey agar?
Bile salts and crystal violet
3 phases of growth
Lag phase
Exponential / log phase
Stationary phase
In 10 generations, get ____x increase in ___ hours
1000 fold
3.3 hours
Requirements for growth
Water Carbon Nitrogen Inorganic ions Trace metals
Example of an obligate anaerobes
Clostridium species
Why are obligate anaerobes obligate anaerobes?
They don’t have enzymes to handle oxygen free radicals
Describe biolog plate
Each has diff carbon source. Used to characterize bac
What bac uses a molecular syringe
Salmonella
Most bac in the ___ and ___ categories make hemolysin
Bacteremia
Meningitidis
Bac that secrete IgA proteases
Haemophilus influenzae
Neisseria meningitidis
Streptococcus pneumoniae
Which gram positive bac produces spores
Clostridia bacillus
How to kill spores
Heat and water
