A solution with a pH of 8 has how many times fewer
hydrogen ions than a solution with a pH of 6?
a. 2
b. 4
c. 10
d. 100
e. 1,000
Answer: d
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Indicate the processes below that represent the basic types of chemoorganotrophic metabolism.
A. Anaerobic respiration B. Oxidation-reduction C. Fermentation D. Photosynthesis E. Aerobic respiration
The use of antibiotics is creating the mutations in bacteria that make them resistant to these antibiotics
A. true B. false
Viruses can be divided into seven basic classes. This classification is determined by:
A. nucleic acid of genome. B. type of host infected. C. cellular location of infection. D. presence of nuclear DNA. E. virus size.
Tetherin is an important protein produced by the host. What is the function of tetherin in protecting a host cell from HIV?
A) ties maturing virions to the membrane of the host cell, thereby preventing the release of the mature virus B) binds the virus to the external host cell membrane, thereby preventing the virus from entering the host cell C) binds the viral RNA to reverse transcriptase, thus preventing synthesis of the viral DNA D) binds the two viral RNA strands together, thus preventing the transcription of viral DNA in the host cell E) causes the maturing virions to aggregate together, thus preventing their release from the host cell