A(n) ________ forms when two atoms share electrons
A) ion
B) covalent bond
C) ionic bond
D) hydrogen bond
Answer: B
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Halogen-containing organic compounds persist in the environment for approximately five years
a. True b. False Indicate whether the statement is true or false
Which is true about C. botulinum?
A. It is anaerobic. B. It may form spores. C. It produces a neurotoxin. D. It does not grow well below pH 4.5. E. All of the choices are correct.
The Salk vaccine
A. protects against nervous system and gastrointestinal infection. B. protects only against gastrointestinal infection. C. is a subunit vaccine. D. protects only against nervous system infection. E. protects against nervous system and gastrointestinal infection AND is a subunit vaccine.
Which one of the following is a common second messenger?
a. cGTP b. cMHC c. cATP d. cAMP e. cGDP