Many chaperones are called heat-shock proteins because they
a. are expressed at higher levels after a heat shock than at normal growth conditions.
b. cause fever in mammals.
c. misfold during a heat shock.
d. denature at high temperatures.
Ans: a. are expressed at higher levels after a heat shock than at normal growth conditions.
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Penicillin is a drug that acts by:
a. irreversibly inhibiting transpeptidase. b. reversibly inhibiting transpeptidase. c. competitively inhibiting transpeptidase. d. noncompetitively inhibiting transpeptidase. e. denaturing transpeptidase
Free energy
A. includes the energy lost as heat. B. is the amount of energy gained by breaking bonds of a chemical. C. differs for a given reaction depending on the number of steps involved. D. always results in a decrease in total energy. E. is the amount of energy gained by breaking bonds of a chemical AND differs for a given reaction depending on the number of steps involved.
The individualistic view of communities proposed by ____ is supported by data showing that species compositions
change gradually across environmental gradients.
a. Clements b. Gleason c. Darwin d. Whitaker e. Connell
Automated external defibrillators (AEDs)
a. check for a heartbeat. b. shock the heart if required. c. use electronic voice commands to guide bystanders in taking appropriate actions. d. are now available at many senior centers, malls, schools, and other public places. e. include all of these