The electron shells of atoms hold eight electrons each
Indicate whether the statement is true or false
FALSE
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Positive and negative transcriptional regulation differ in that:
A. positive regulation requires that a promoter be present; it's not necessary in negative regulation. B. in positive regulation, the binding of a regulatory protein to the DNA is necessary for transcription to occur; in negative regulation, no such protein is necessary. C. in positive regulation, the binding of a regulatory protein to the DNA is necessary for transcription to occur; in negative regulation, such binding prevents transcription. D. in positive regulation, the absence of a regulatory protein promotes transcription; in negative regulation, the absence of a regulatory protein promotes transcription. E. None of these choices is correct.
When a neuron is at rest
a. the sodium and potassium gated channels are closed. b. the sodium gated channels are closed and the potassium gated channels are open. c. the sodium gated channels are open and the potassium gated channels are closed. d. the sodium and potassium gated channels are open. e. the sodium and potassium gated channels may be open or closed depending upon their location in the nervous system
____________________ result from immunological hypersensitivity to what should be harmless
substances. Fill in the blank(s) with the appropriate word(s).
Energy present in a system that is not usable to do work relates to the system's:
A) temperature. B) work. C) entropy. D) thermodynamics. E) equilibrium.