The membrane component(s) primarily responsible for the structure and function of plasma membranes is/are
A. nucleic acids.
B. glycolipids.
C. phospholipids.
D. cholesterol.
E. glycosylated proteins.
Answer: C
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Statistical analysis of genetic variation within and among human populations—including those we identify as different races—reveal:
A. more genetic variation between groups than we see within groups. B. more genetic variation within groups than we see between groups. C. no clear pattern of genetic variationâ€"in some regions, we would see more variation within than among groups, and in some regions we would see the opposite. D. a correlation between the amount of genetic variation between groups and the length of time the groups have been isolated from one another. E. None of the above.
Botulism and tetanus have the ability to interfere with neuromuscular functions. The toxins they produce are classified as:
a. endotoxins. b. enterotoxins. c. exotoxins. d. emetic toxins.
A protein is tightly associated with the plasma membrane and it can be isolated by treating the membrane with a strong detergent. What type of membrane protein is this?
A. A peripheral membrane protein B. An integral membrane protein C. Either an integral or a peripheral membrane protein D. Neither an integral nor a peripheral membrane protein
Fossil fuels are primarily the result of
a. animal bones. b. animal wastes. c. decaying plants. d. worn-away rocks