Which of the following best describes the structure of DNA?
A. single helix
B. protein coil
C. double helix
D. globular RNA
C. double helix
Biology & Microbiology
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The chemical nature of endotoxins is that of a
A. protein. B. nucleic acid. C. lipid. D. lipopolysaccharide.
Biology & Microbiology
__________ respond to mechanical energy such as touch. Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology
Which of the following diseases is NOT associated with bacteria that form endospores?
A. tetanus B. anthrax C. gangrene D. botulism E. toxic shock syndrome
Biology & Microbiology
Which of the following best explains why bees aren't attracted to red flowers?
A. Red flowers are imperfect and do not produce pollen. B. Bees perceive red as a warning signal. C. Bees can't see red. D. Red flowers usually are odorless. E. Red flowers do not produce nectar.
Biology & Microbiology