How are integral and peripheral proteins similar to each other?
a. They both interact with the hydrophobic core of the membrane.
b. They both function at the membrane.
c. They both consist of a mixture of polar and nonpolar amino acids.
d. They are both found on the membrane surface.
Ans: b. They both function at the membrane.
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Why do animals in deep ocean depths live in complete darkness?
a. because 100% of the ocean is at a depth where no light penetrates b. because over 90% of the ocean is at a depth where no light penetrates c. because over 80% of the ocean is at a depth where no light penetrates d. because over 70% of the ocean is at a depth where no light penetrates
When Hawkins and others surveyed the literature for evidence that solar energy input and/or precipitation input predict species diversity, they found that energy input was correlated with species diversity in only one of the following regions. Which was it?
A) north-temperate region B) the tropics C) south-temperate region D) all of the above
What advantage does the activity of osteoblasts and osteoclasts impart to vertebrates, even after growth has finished?
A) As old bones are dissolved, new bones can be formed. B) The cells enable bone to lengthen and shorten as needed. C) Bone growth never finishes; it continues at a slow pace throughout life. D) The cells allow bone to get stronger as physical demands are placed on it.
Which drug exerts its effect by weakening the cell wall until the bacterial cell is lysed?
A. Linezolid B. Vancomycin C. Bacitracin D. Rifampin