Mitogens are _____
(a) extracellular signals that stimulate cell division.
(b) transcription factors important for cyclin production.
(c) kinases that cause cells to grow in size.
(d) produced by mitotic cells to keep nearby neighboring cells from dividing.
(a)
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Which of the following is not true about a hypothesis?
A. It can be proven to be false. B. Previous knowledge can help support it. C. It can be proven to be true. D. It is a tentative explanation. E. It must be testable to be useful.
What is the cause of most peptic ulcers?
a. lactose intolerance b. heartburn c. bacteria d. malnutrition
Capsids are composed of protein subunits known as
a) capsomeres. b) spikes. c) envelopes. d) tail fibers.
Rodents are the normal hosts for which of the following encephalitis viruses?
A. eastern equine encephalitis (EEE) B. St. Louis encephalitis C. Venezuelan equine encephalitis (VEE) D. western equine encephalitis (WEE) E. West Nile virus