A complete virus particle is called a ________.
A. nucleocapsid
B. virion
C. cell
D. capsid
Answer: B
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Acetylcholine is a neurotransmitter that binds to receptors on skeletal muscle cells. The receptor-signal complex brings about a series of events that result in contraction of skeletal muscle
Venom from black widow spiders causes an explosive release of acetylcholine. What would that do to its victims? A) The victim's muscles would be unable to contract. B) The victim's muscles would be unable to relax. C) The victim's cell receptors would no longer be able to bind regulatory hormones. D) The victim's cell receptors would be able to bind regulatory hormones but at a rate greatly exceeding normal rates.
Molecular, biochemical, cellular, and morphological evidence supports the view that bryophytes are a
monophyletic group.
Indicate whether the statement is true or false.Why is the paroxysmal stage of Pertussis so long?
A. It takes a while for our immune system to fight the pathogen B. It takes time for the many cells in our respiratory tract to die and fall off C. It takes time for the toxin to work D. Our cough ‘trigger’ in our brain has to get reset E. A and B F. All of the above
A hormone that causes cell division and is found in coconut milk and in dividing root tissue is
A. ethylene. B. cytokinin. C. gibberellin. D. abscisic acid. E. auxin.