At temperatures higher than the maximum growth temperature for an organism,
A) proteins are permanently denatured.
B) membranes become too fluid for proper function.
C) hydrogen bonds within molecules are broken.
D) hydrogen bonds are broken and proteins are permanently denatured.
E) hydrogen bonds are broken, proteins are denatured, and membranes become too fluid.
E
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When sodium ions flow into the axon
cytoplasm,
a. the membrane potential reverses. b. the cytoplasm becomes more positively charged. c. the interstitial fluid becomes more negatively charged. d. an action potential is generated. e. all of these things happen
Which represents the lowest degree of
certainty? a. hypothesis b. conclusion c. fact d. principle e. theory
What have studies of glucose transport in liposomes revealed?
a. Glucose is transported against a concentration gradient. b. Glucose moves readily across the membrane by simple diffusion. c. Glucose phosphates move readily across the membrane by simple diffusion. d. The binding of glucose triggers a conformational change in the carrier protein. e. The transport of solutes via carrier proteins is faster than via channel proteins.
Answer the following questions true (T) or false (F)
1. Some bacterial cells are resistant to a variety of antimicrobials because they actively pump the drugs out of the cell. 2. The outer membrane of Gram-negative bacteria enables many antimicrobial drugs to enter the cell more easily. 3. If a subculture of an MIC test grows in an MBC test, the concentration of the drug was bactericidal.