The physician explained that her cancer had metastasized or
A. spread from its original site.
B. shrunk in size.
C. become benign.
D. stopped growing.
A. spread from its original site.
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Which of the following molecules inhibits bacterial transcription by prevention of promoter clearance?
A. ?-amanitin B. actinomycin D C. rifampicin D. acridine E. ethidium bromide
Which of the following processes does NOT serve to
maintain low pressure at the receiving end of sieve tube pipelines? a. sucrose conversion into cell-wall polysaccharides b. sucrose conversion into starch in the receiving regions c. sucrose conversion to glucose, which is then used in cellular respiration d. activity of companion cells e. conversion of sucrose to fructose in fruits
How long does the spike of an action potential last?
a. one second b. one millisecond c. one microsecond d. one half second e. one nanosecond
What distinguishes influenza from the common cold?
A) Fever B) Pharyngitis C) Cough D) Malaise E) Nasal congestion