Omnivorous animals consume both plant and animal tissue
a. True
b. False
a
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A mutation creates a deletion in the C-terminal region of the bacterial RecA protein of E. coli rendering it Rec-. It would be reasonable to surmise this mutation might:
A. increase autoinhibition of RecA. B. increase RecA binding to DNA. C. decrease autoinhibition of RecA. D. be both A and B. E. be both B and C.
Spikes are specialized receptors that allow ____ to attach to host tissues
Fill in the blank(s) with the appropriate word(s).
Malaria may be prevented by
A. taking prophylactic drugs. B. using bed nets sprayed with insecticide. C. eliminating standing water. D. using genetically engineered mosquitoes. E. All of the choices are correct.
If a person is treated with a single anti-HIV drug, they often end up with a resistant strain. How does this occur?
a. The drugs weaken the immune system, making a patient more susceptible to infection with resistant strains of HIV b. The drug causes mutations in the HIV, making them resistant to the drug c. The drugs kill all sensitive viruses, leaving only the pre-existing resistant viruses d. The HIV wants to avoid the drug, so it becomes resistant