In the experiment in which Frye and Edidin fused the plasma membranes of a mouse and a human cell,
what happened to the membrane proteins?
a. They formed a spherical structure.
b. They formed a bilayer.
c. They moved laterally across the cell surface.
d. They flip-flopped from one layer to the other.
e. They reacted with cholesterol molecules on the membrane surface.
C
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Match the cytoskeletal filament with its protein subunit. Responses may be used multiple times or not at all. a. microtubule b. intermediate filament c. microfilament ____ keratin ____ actin ____ tubulin ____ lamin ____ vimentin
What will be an ideal response?
Oxidation is defined as the removal of ________. In biological systems, these are usually accompanied by protons in a process called ________.
Fill in the blank(s) with the appropriate word(s).
Clostridium tetani, the bacterium that causes tetanus, can only survive in soil away from oxygen. It is considered which of the following?
A. an autotroph B. an obligate anaerobe C. a facultative anaerobe D. aerobic E. a phototroph
You should eat a variety of vegetables because
A. vegetables are an excellent source of protein. B. different vegetables have different vitamins and minerals. C. plants contain toxins and eating only one could be harmful. D. None of the above is correct.