The Spanish flu of 1918 was caused by an ________ influenza virus
A) H2N1
B) H5N1
C) H1N1
D) H2N2
Answer: C
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The earliest species known to reproduce sexually was a
a. cyanobacterium. b. green alga. c. fungus. d. red alga. e. archaebacterium.
Pathogenic bacteria isolated from the respiratory or intestinal tracts of humans are
A) strict aerobes that grow best in candle jars. B) capnophiles that grow best in carbon dioxide incubators. C) facultative anaerobes that require reducing media for growth. D) strict aerobes that grow best in reducing media. E) capnophiles that prefer highly oxygenated growth conditions.
T cell receptors
a. are cell surface receptors integrated into the cytoplasmic membrane of T cells. b. bind foreign peptides in the context of MHC. c. are composed of an alpha and beta chain. d. exhibit all of the properties listed above.
Consulting Figure 7.1 if necessary, during which stage(s) of cellular respiration is(are) carbon dioxide released?
A. stage 1 only B. stages 1 and 2 C. stages 2 and 3 D. stage 3 only E. stages 3 and 4