Which of the following is true of pol II?
A) It must be in its phosphorylated form to cause both the initiation and elongation.
B) It must be in its dephosphorylated form to cause both the initiation and elongation.
C) It must be in its phosphorylated form to initiate transcription but must be in its dephosphorylated form to cause elongation.
D) It must be in its dephosphorylated form to initiate transcription but must be in its phosphorylated form to cause elongation.
D
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A 300-W electric heater is used in a 110-V circuit. The safety fuse in the circuit can accommodate 15 A of current. How many heaters can be safely operated in the circuit?
A. 5 B. 4 C. 3 D. 2
Which of the following atmospheric layers is the thickest?
A. the layer bounded by 1001 hPa and 1010 hPa B. the layer bounded by 1 hPa and 10 hPa C. the layer bounded by 500 hPa and 550 hPa D. the layer bounded by 101 hPa and 110 hPa
What percent of the population of New Zealand lives on the North Island?
A) 50% B) 10% C) 70% D) 25% E) 60%
The highest temperatures in the atmosphere occur in the
A) mesosphere. B) troposphere C) thermosphere. D) stratosphere.