Which antibiotic inhibits transcription by blocking the active site of RNA polymerase?
a. streptomycin
b. cephalosporin
c. ciprofloxacin
d. rifampin
Answer: D
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The data from the butterfly experiment
reflected which of the following? a. natural selection b. food choices by predators c. the ability of birds to find the prey d. the role of mimicry e. all of these
You wish to prevent transcription of all three types of RNA in bacteria. How many different types of RNA polymerase would you need to inhibit?
What will be an ideal response?
Many cases of pediatric thyroid cancer occurred after the 1986 Chernobyl nuclear accident in Ukraine and the cause was traced to milk containing iodine-131
Which of these might be the most effective method to prevent thyroid cancer increase following exposure to excessive radiation? A) Do not allow anyone to drink any milk. B) Give dairy cows large doses of iodine. C) Give humans large doses of iodine before exposure. D) Give people large doses of iodine a few days following exposure.
The plural of genus is:
a. species. b. genera. c. genuses. d. family. e. genius.