The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane
â€"more acidic outside the cell than inside the cell. Phosphate transport is an example of _____.
A) passive diffusion
B) facilitated diffusion
C) active transport
D) osmosis
E) cotransport
Answer: E
You might also like to view...
Which of the following molecules does NOT
have a total of three carbon atoms? a. PEP b. PGAL c. fructose-1, 6-biphosphate d. pyruvate e. phosphoglycerate (PGA)
Frameshift mutations result from:a
the substitution of one base pair for another. b. the substitution of more than one base pair. c. the insertion or deletion of one or two base pairs. d. the substitution of a stop codon for an amino acid-specifying codon. e. the substitution of a start codon for an amino acid codon.
In the absence of oxygen, can cells utilize the electron transport chain?
A. No, oxygen is a required cofactor for the complexes in the electron transport chain. B. Yes, in the case that a cell can use a terminal electron acceptor other than oxygen, it can make use of the electron transport chain. C. No, oxygen is the primary electron acceptor in electron transport chains in all cell types. D. Yes, all cells can make use of the electron transport chain in the absence of oxygen via fermentation.
What feature of mycobacteria is responsible for the unusually slow growth of these bacteria?
A) Their low tolerance for oxygen retards their growth. B) They cannot fully metabolize carbohydrates and must rely on fermentation. C) They have limited numbers of ribosomes so protein production is slow. D) The mycolic acid in their cell walls requires signification metabolic investment. E) They lack a cell wall and are extremely fragile.