It is inappropriate to prescribe antibacterial agents to treat colds or flu because
A. the microbes involved can develop resistance rapidly.
B. these diseases are transmitted by endospores, which are difficult to kill.
C. these diseases exhibit cross resistance.
D. these diseases are caused by viruses.
E. these diseases can act synergistically with each other.
Answer: D
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________ of prokaryotic genomes are now available in public databases
A) Dozens B) Hundreds C) Thousands D) Millions
As shown in Figure 25.1 (and reproduced here), atmospheric CO2 levels oscillate over the course of the year. What season would you expect oxygen levels to be highest?
A. summer B. fall C. winter D. spring
In a typical sequencing reaction, the amount of dNTPs is much greater than of the ddNTPs. Predict the results if equal amounts of both types of nucleotides were used in each reaction. After gel electrophoresis and visualization:
A. mostly long fragments would be present and no sequence could be read close to the primer. B. mostly short fragments would be present and only sequences very close to the primer could be read. C. the sequence could be read normally; the dNTP/ddNTP ratio does not affect the products of the reaction. D. only the purine reactions would show termination and be read from the gel. E. no bands would be visible because the high concentration of ddNTPs would inhibit the activity of the polymerase.
Which of the following represents the correct
hierarchy of organization in the human body? a. cells >>> tissues >>> organ systems >>> organs b. cells >>> tissues >>> organs >>> organ systems c. tissues >>> cells >>> organs >>> organ systems d. tissues >>> organs >>> cells >>> organ systems e. organs >>> tissues >>> cells >>> organ systems