The protein coat of a virus
A. is called a capsomere.
B. is called a capsid.
C. protects the nucleic acid.
D.
is involved in the recognition of host cell receptors by non-enveloped viruses.
E.
is called a capsid, protects the nucleic acid, AND is involved in the recognition of host cell receptors by non-enveloped viruses.
E
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Which of the following is NOT true about
action potentials?
a. they cannot move backwards b. they are an example of negative feedback c. they are generated and completed in a matter of milliseconds d. they are only generated if the threshold potential is reached e. they are all the same size
Hormones travel in the bloodstream yet only certain cells respond. This specificity is due to the presence of _____ in the target cells
1.cell marker proteins 2.channel proteins 3.protein receptors 4.transport proteins
In gram negative bacteria a pilus allows it to
A) attach to surfaces, aiding in the formation of biofilms. B) move using an "oarlike" motion. C) transfer genetic material. D) infect their host.
Cholesterol functions in the plasma membrane to
A. serve as an energy molecule. B. maintain fluidity. C. maintain hypertension. D. mediate steroid action. E. transport ions.