The basic structural component of the plasma (cell) membrane is ________
A) chromatin
B) phospholipid bilayer composed of two layers of phospholipid molecules
C) telophase
D) nuclear membrane
B
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The "selection ratio" refers to:
A. number hired divided by number passed the test B. number hired divided by number applied C. number passed the test divided by number hired D. number applied for the job divided by number hired
Cytotoxic T cells destroy their target cells by releasing perforin, which causes holes to form in
A. ribosomes. B. DNA molecules. C. lysosomes. D. cell membranes.
All of the following are types of mediated transport except one. Identify the exception.
A) secondary active transport B) primary active transport C) simple diffusion D) facilitated diffusion
Which of the following is NOT a function of proteins?
A. They form hemoglobin to transport oxygen in the blood. B. They form the backbone of cell membranes. C. They form enzymes to speed up reactions. D. They form antibodies to protect the body from disease.