The pleasurable effects of cigarette smoking are due to an increase in the release of the neurotransmitter ________
Fill in the blank(s) with correct word
dopamine
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Which of the following features of transcription initiation is least likely to contribute to the process of "abortive initiation"?
A. Early in initiation, the RNA exit channel of RNA polymerase is blocked by the polymerase itself. B. Early in initiation, the RNA exit channel of RNA polymerase is blocked by the sigma factor. C. The transition between the closed and open complex is energetically costly. D. RNA is synthesized de novo, requiring no primer. E. Early in initiation, the processivity of RNA polymerase is low.
The production of root hairs is mostly dependent on which of the following influences?
A. auxin production B. position of an epidermal cell C. width of the root D. length of the root E. position of the root in the soil
If the pH of a solution is decreased from 9 to 8, it means that the concentration of _____
A) H+ has decreased to one-tenth (1/10 ) what it was at pH 9 B) H+ has doubled compared to what it was at pH 9 C) H+ has increased tenfold (10X) compared to what it was at pH 9 D) OH- has increased tenfold (10X) compared to what it was at pH 9
The instrument used to measure oxygen consumption in this lab was a
A. balance. B. fermentation tube. C. graduated cylinder. D. respirometer. E. volumeter.