When you breathe quietly, inhalation is _____ and exhalation is _____
a. passive; passive c. passive; active
b. active; active d. active; passive
D
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The supersecondary structure (motif) most likely to contain a heptad (or leucine) repeat would be:
A. a Greek key. B. a ?-?-?. C. a helix-turn-helix. D. a coiled-coil. E. a four-helix bundle.
What protein influences the ability of RNA polymerase to transcribe genes?
A. DNA polymerases B. DNA helicases C. transcription factors D. snRNPs E. tRNA
Pepsin, a digestive enzyme that degrades proteins in the stomach, is synthesized as pepsinogen and converted to active
pepsin in the stomach by the removal of several amino acids. The activation of pepsin is an example of ____.
a. transcriptional regulation b. translational regulation c. posttranscriptional regulation d. posttranslational regulation e. RNAi
What happens to air as it is cooled?
a. It rises. b. It sinks. c. It moves horizontally. d. It moves at a faster speed. e. It does none of these