To mobilize more glucose during fasting,
A. only cortisol will increase.
B. only epinephrine will increase.
C. only glucagon will increase.
D. only glucagon and cortisol will increase.
E. cortisol, epinephrine, and glucagon will all increase.
E. cortisol, epinephrine, and glucagon will all increase.
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Which of the following best describes the factors determining water potential of plant cells?
A. solute outside the cell B. solute inside the cell C. cell turgor pressure D. pressure at the cell wall-membrane interface E. All of these are true
If, during protein starvation, the osmotic pressure forcing fluid into the blood on the venous side of capillary beds drops below the blood pressure, then
A. hemoglobin will not release oxygen. B. fluids will tend to accumulate in tissues. C. the pH of the interstitial fluids will increase. D. most CO2 will be bound to hemoglobin and carried away from tissues. E. plasma proteins will escape through the endothelium of the capillaries.
Which of the following processes within viral replication is the greatest source of genetic variation in RNA virus populations?
A) High mutation rate due to lack of proofreading of RNA genome replication errors. B) Transcription from the host cell RNA polymerase introduces numerous mutations. C) Capsid proteins from the host cell can replace the viral capsid. D) Viral RNA is translated by host cell ribosomes.
The conversion of pyruvic acid to acetyl-CoA can be described as ________, because a molecule of CO2 is produced as a by-product
A) decarboxylation B) amination C) respiration D) oxidation E) phosphorylation