Which of the following countries is NOT in the
industrial stage?
a. Japan
b. Canada
c. Australia
d. Mexico
e. United States
Answer: d
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If a mixture of bacteriophages, some labeled
with radioactive sulfur and others labeled with radioactive phosphorus, is placed in a bacterial culture, the bacteria will eventually contain a. radioactive sulfur. b. radioactive phosphorus. c. both radioactive sulfur and phosphorus. d. neither radioactive sulfur nor radioactive phosphorus. e. complete viruses with radioactive sulfur coats.
Which of the following is NOT true about DNA replication?
A.) It must occur before a cell can divide B.) Two complementary strands are duplicated C.) The double strand unwinds and unzips while it is being duplicated D.) The new DNA molecule has two newly-made strands.
Through control of gene expression, a bacterial cell responds to changing ________ conditions.
A. internal B. protein C. genetic D. environmental
A nosocomial infection is
a. Always present but is inapparent at the time of hospitalization. b. Acquired during the course of hospitalization. c. Always caused by medical personnel. d. Only a result of surgery. e. Always caused by pathogenic bacteria.