Early classification systems of the bacteria employed all of the following characteristics except
A. the ability to photosynthesize.
B. rRNA sequences.
C. motility.
D. colony or filament forming.
E. sporulation or binary fission.
B. rRNA sequences.
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The barriers to invasion by microbes can involve
a. urine. b. the symbiotic microorganisms already in the body. c. ciliated mucous membranes. d. lysozyme and other enzymes. e. all of these.
The glucose-facilitated diffusion transporter can transport glucose
a. into the cell only. b. out of the cell only. c. into or out of the cell. d. only in the presence of ATP.
Infections acquired in a hospital or clinical setting are known as
What will be an ideal response?
A small amount of antigen is injected under the skin of a patient. After 30 minutes there is no apparent change at the injection site, but 36 hours later the patient reports that the area is red and swollen. This type of response is due to
A) type I hypersensitivity. B) type II hypersensitivity. C) type III hypersensitivity. D) type IV hypersensitivity. E) immunodeficiency.