How do retroviruses differ from other RNA viruses?
a. Retroviruses have a unique capsid shape.
b. Retroviruses lytically destroy their hosts.
c. Retroviruses have a unique infection technique of their host cells.
d. Retroviruses have a capsid composed of protein and carbohydrates.
e. Retroviruses have reverse transcriptase instead of RNA-dependent RNA polymerase
e
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A solution with a pH of 9 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
Which of the following statements about the light reactions of photosynthesis are correct?
a) The energy of the sun is captured as potential energy. b) Pigments absorb light energy, which excites electrons. c) Carbon dioxide splits, providing a source of electrons. d) Only a) and c) are correct. e) Only a) and b) are all correct.
In a reptile egg, which membrane is analogous to a lung?
A) Amnion B) Allantois C) Yolk sac D) Blastocyst E) Chorion
Further characterization of the S. aureus isolated from George's wound reveals that the strain is MRSA. Why is George's doctor concerned that MRSA has been identified as the causative agent of George's infection?
a. MRSA is transmissible. b. MRSA is not typically associated with the type of infection that George has. c. The available treatment options are quite aggressive, including removal of damaged tissue in an effort to contain the infection. d. There are no effective antibiotic options for treating MRSA.