Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
29 Cards in this Set
- Front
- Back
|
What transport system involves extracellular binding proteins?
|
ABC Transport System
|
|
|
Multidrug Efflux Pumps--which Transport System are these part of?
|
ABC Transport System
|
|
|
What are the carbon, energy, and electron sources for a chemolithotroph?
|
Carbon: CO2
Electrons: Inorganic molecules Energy: Chemical (inorganic molecules) |
|
|
What are the carbon, energy, and electron sources for a chemoorganotroph?
|
Carbon: Organic molecules
Electrons: Organic molecules Energy: Chemical (organic molecules) |
|
|
What are the carbon, energy, and electron sources for a photolithotroph?
|
Carbon: CO2
Electrons: Inorganic molecules Energy: light |
|
|
What are the carbon, energy, and electron sources for a photoorganotroph?
|
Carbon: CO2
Electrons: Organic molecules Energy: light energy |
|
|
What is the function of teichoic acids?
|
They are amphipathic molecules that traverse the gram positive cell wall
They are negatively charged on the outside and may attract + ions for later uptake by the cell They may control autolysin activity and lend stability to the cell wall through linkages to NAM. |
|
|
What is the difference between the two layers of the gram-negative outer cell wall membrane?
|
Outermost layer = LPS, Lipid A/O-Polysaccharide, has porins, etc.
Inner layer = regular phospholipids. |
|
|
Where are porins located?
|
On the outer cell membrane of gram-negative bacteria.
|
|
|
What is the function and location of Braun Lipoproteins?
|
They are on the inner surface of the outer cell membrane and anchor it to the pglycan wall.
|
|
|
When will E.Coli switch to fermentative metabolism?
|
Grow anaerobically on glucose and ammonia/ammonium medium.
|
|
|
Which bacterial cell walls lack peptidoglycan?
|
Planctomyces and Chlamydia
|
|
|
What are the sizes of the bacterial ribosome and its subunits in Svedbergs?
|
Ribosome: 70S
Subunits: 50S + 30S |
|
|
What is the size of the archaeal ribosome?
|
70S (but chemistry differs from bacterial ribosome)
|
|
|
When will E. Coli use anaerobic respiration?
|
Grow aerobically in a medium of glucose and nitrate (NO3-) as a terminal electron acceptor.
|
|
|
When will E. Coli carry out aerobic respiration?
|
Grow aerobically on a medium of glucose and ammonia/ammonium.
|
|
|
What is hydrogenase used for in hydrogen bacteria?
|
Overall rxn: H2 --> 2e- + 2H+
Membrane Hydrogenase: establish electrochemical gradient for oxidative phosphorylation Cytoplasmic Hydrogenase: reduce NAD+ --> NADPH + H+. |
|
|
Why does glycolysis yield 3 ATP in prokaryotes but only 2 net ATP in eukaryotes?
|
Glucose is already phosphorylated to G-6-P when it reaches the cytoplasm due to prokaryotic use of Phosphotransferase System.
Eukaryotes must invest additional ATP to phosphorylate glucose. |
|
|
Which photosynthetic bacteria use cyclic photophosphorylation ONLY?
|
purple and green photosynthetic bacteria, phototrophic heliobacteria
|
|
|
Which photosynthetic bacteria require the use of reverse electron flow to generate reducing power (NADH)?
|
Purple photosynthetic bacteria
|
|
|
Which photosynthetic bacteria contain bacteriochlorophyll?
|
Anaerobic photosynthetics: purples/greens
|
|
|
What does Photosystem I make?
|
NADH/reducing power
|
|
|
What does Photosystem II make?
|
ATP
|
|
|
What is the reaction center of Photosystem II?
|
P680
|
|
|
What is the reaction center of Photosystem I?
|
P700
|
|
|
What is the reaction center used in anoxygenic photosynthesis?
|
P870
|
|
|
What protein do anoxygenic photosynthetic bacteria use to generate reducing power?
|
Ferredoxin
|
|
|
What does Ferredoxin do in an overabundance of NADH?
|
Reroutes electrons through cytochrome Bf in PII to generate PMF rather than NADH.
This is cyclic phosphorylation in two-photosystem organisms. |
|
|
Which AI signal has a boron atom in it?
|
AI2
not AI1 both made from DPD with LuxS |
