One of the three internal cell cycle checkpoints occurs during ____ and monitors ____
a. the G1/S transition; mitotic spindle integrity
b. late S phase; the presence of DNA damage
c. the G2/M transition; the presence of DNA damage
d. the G2/M transition; mitotic spindle integrity
e. anaphase; the presence of DNA damage
ANSWER: c
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The bacterium Brucella abortus imports and uses the unusual sugar erythritol. The concentration of erythritol within the B. abortus cell is 10 mM, but the external erythritol concentration is much lower at 0.20 mM
What is the energy requirement (?G inward in kcal/mol) for the inward transport of erythritol at 37°C under these conditions? What will be an ideal response?
Which of the statements in INCORRECT about the following reaction? Phosphoenolpyruvate + ADP ? Pyruvate + ATP (?G = -7.5 kcal/mole)
A. It is anabolic. B. It is catabolic. C. It can be used to drive an endergonic reaction. D. The synthesis of ATP occurs by substrate-level phosphorylation. E. It is a reaction that yields energy.
Chromatids that are attached at the centromere are called ______ chromatids
a. mother b. daughter c. preprogrammed d. sister e. duplicated
Which of the following is the pathway for water transport in a plant?
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