What type of chemical bond is being broken when methane burns in oxygen?
A. Ionic
B. Hydrogen
C. Polar covalent
D. Nonpolar covalent
Ans: D. Nonpolar covalent
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In the experiments conducted by Avery, McCarty, and MacLeod, which one of the following hypothetical results would indicate that protein, not nucleic acid, was Griffith's transforming principle?
A. None of the extracts from heat-killed cells are able to transform nonvirulent bacteria. B. All of the extracts from heat-killed cells are able to transform nonvirulent bacteria. C. Only the extract from heat-killed cells treated with RNase are unable to transform nonvirulent bacteria. D. Only the extracts from heat-killed cells treated with DNAse are unable to transform nonvirulent bacteria. E. Only the extracts from heat-killed cells treated with protease are unable to transform nonvirulent bacteria.
How many nucleotides are contained in a single codon?
A. 1 B. 3 C. 4 D. 6 E. 9
The human temperature set point typically
a. ranges from about 96.0?F to about 99.5?F. b. stays right at about 98.6?F. c. stays right at about 96.8?F. d. ranges from about 98.0?F to about 99.5?F. e. ranges from about 94.0?F to about 99.0?F.
The structure in Figure 25-1 labeled C is:
a. a ribosome.
b. the plasma membrane.
c. the capsule.
d. the cell wall.
e. the flagellum.