Receptor mediated endocytosis:
A. is involved in receptor recycling
B. involves cell membrane fusion
C. can involve the protein clatherin
D. can induce a refractory period for signal transduction
E. all of the above
Answer: E. all of the above
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Although heavy metals are no longer widely used as germicides, ________ is an effective algicide in lakes and swimming pools.
A. mercuric chloride B. silver nitrate C. lead acetate D. copper sulfate
In transformation experiments using a variety of Bacteria, it has been noted that essentially all of the cells in a population can become competent
Indicate whether the statement is true or false.
Histamine
a. causes blood vessels to contract. b. causes capillaries to lose their permeability. c. causes an outward flow of fluids from the capillaries. d. reduces tissue swelling. e. enhances the function of cytokines.
Answer the following questions true (T) or false (F)
1. Both viruses and prokaryotes reproduce by binary fission. 2. The shape of a virus may be determined by either its capsid or its envelope. 3. The number of species that a specific virus infects is called its host range while the types of tissues that the virus infects is called tropism.