Which of the following compounds helps to
maintain our blood pH between 7.35 and 7.45?
a. water
b. carbonic acid
c. hydrocloric acid
d. hydrogen peroxide
e. sodium hydroxide
B
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Vibrio cholerae can be readily isolated and identified in the laboratory from stool samples by
A. its robust chemotactic response to the presence of chitin. B. dark-field microscopy looking for motility. C. its ability to grow at high temperature and produce zones of clearing on blood agar. D. growth on selective media followed by PCR of its 16S rRNA gene.
What is the function of the lacY gene in the lac operon?
What will be an ideal response?
Who developed the method widely used to sequence DNA?
What will be an ideal response?
The major source of naturally-produced penicillin is the mold ________.
What will be an ideal response?