Quiz questions Flashcards
(15 cards)
Which of the following statements is NOT true regarding the electron donors in prokaryotic metabolism?
The use of organic compounds as electron donors is known as organotrophy.
Chemolithotrophy refers to the use of inorganic molecules as electron donors.
If NH4 serves as an electron donor, this process is called nitrification, and is an example of lithotrophy.
Oxygen can serve as an electron donor.
Oxygen can serve as an electron donor.
Reduction potential is defined as
the tendency for a compound to release H+ in solution.
the tendency for a compound to release OH− in solution.
the tendency of a compound to accept electrons.
the tendency of a compound to donate electrons.
the tendency of a compound to accept electrons.
All of the following groups or molecules are components of electron transport systems that are involved in moving electrons, EXCEPT
heme b.
[2Fe-2S] and [4Fe-4S] iron-sulfur clusters.
quinones.
flavin mononucleotide (FMN).
ATP synthase
ATP synthase
The location in which ATP is synthesized (via oxidative phosphorylation) in gram-negative bacterial cells.
The matrix of the mitochondria
The perimplasmic space
The cytoplasm
Gas vacuoles.
The Cytoplasm
The donation of electrons from NADH + H+ to NADH:quinone oxidoreductase is an example of
chemoorganotrophy
fermentation
anaerobic respiration
lithotrophy
chemoorganotrophy
If a drug were designed that was only effective against Burkholderia pseudomallei, this drug would be considered to be:
broad spectrum
narrow spectrum
bacteriostatic
bacteriocidal
narrow spectrum
If the outer membrane of a Gram-negative bacterium provided resistance against an antibiotic, this would be an example of
an acquired resistance mechanism
an intrinsic resistance mechanism
an intrinsic resistance mechanism
An example of an antibiotic that binds to the 30S ribosomal subunit would be
streptogramins
macrolides
beta-lactams
tetracyclines
tetracyclines
How do humans get folic acid?
have efflux pumps for the drug
take in folic acid in the diet
are naturally immunized from the drug
do not require folic acid
take in folic acid in the diet
A bacterium has evolved a new enzyme that can cleave a beta-lactam ring structure. It would NOT be treatable by which class of drugs
streptomycin
ampicillin
tetracycline
bacitracin
ampicillin
Species of Pseudomonas and Rhodococcus can degrade benzoate and other aromatic molecules, either aerobically or anaerobically. Which of the following is NOT correct regarding anaerobic degradation of aromatic molecules?
It takes longer than aerobic respiration
It is a critical process because anaerobic environments can become contaminated with aromatic compounds
It proceeds by producing the intermediate catechol
Benzoate is converted to benzoyl-CoA which is then further broken down to acetyl-CoA
It proceeds by producing the intermediate catechol
BLANK enters the TCA by condensing with oxaloacetate to form BLANK
succinoyl-CoA: fumarate
Acetyl-CoA: citrate
Pyruvate: citrate
Citrate: isocitrate
Acetyl-CoA: citrate
The enzyme pyruvate kinase catalyzes the conversion of phosphoenolpyruvate to pyruvate; the phosphate group is transferred to ADP to form ATP. This reaction is an example of substrate level phosphorylation.
True
False
True
Which pathway for glucose catabolism will result in the production of both NADH and NADPH?
Embden-Meyerhof Parnas
Entner-Doudoroff
Pentose Phosphate Pathway
Entner-Doudoroff
Fatty Acids can serve as a carbon and energy source of the cell. They are channeled into the TCA cycle after being degraded to what molecule?
Citrate
Acetyl-CoA
Glyceraldehyde 3-phosphate
Glucose
Acetyl-CoA
