Photosynthetic pigments that absorb light from regions of the visible spectrum not absorbed by chlorophyll are referred to as ____
Fill in the blank with the appropriate word.
carotenoids
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The initiation of transcription in eukaryotes almost always requires activator proteins because:
A. RNA polymerases have little to no intrinsic affinity for promoter sequences. B. RNA polymerases cannot synthesize RNA polymers without association with coactivators. C. promoter sequences are almost always bound by repressor proteins. D. eukaryotic genes exhibit very low gene density.
A 6-year-old girl is diagnosed with a bullous impetigo infection. Based on this information, the catalase and coagulase results of the infecting organism are expected to be catalase-_____ and coagulase-_____
a. negative; negative b. positive; negative c. positive; positive d. negative; positive
The tradewinds in the zone from 0 to 30
degrees north latitude are generally from the a. north. b. northwest. c. northeast. d. southeast. e. southwest
Which of the following is NOT a difficulty that medicine has encountered in its attempts to cure human diseases through gene therapy?
a) The transfer organism—a bacterium or virus—may get into unintended cells and cause disease. b) It is difficult to get the working gene into enough cells at the right rate to have a physiological effect. c) For many diseases, a malfunctioning gene has not been identified. d) It is difficult to get the working gene into the specific cells where it is needed. e) All of the above are difficulties that medicine has encountered in its attempts to cure human diseases through gene therapy.