Which of the following will result when 1% to 5% agar is added to nutrient broth, boiled and cooled?
A) A solid medium
B) A liquid medium
C) A mixed culture
D) A contaminated medium
E) A pure culture
A) A solid medium
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The molten globule model of protein folding suggests:
A. hydrogen bonding of secondary structures drives folding. B. translation of the polypeptide is complete before folding begins. C. each domain of a polypeptide folds independently. D. intermediates of increasing free energy are created. E. hydrophobic residues coalesce to form intermediate structures.
Graded potentials are particularly important for conveying stimulus intensity in
A. sensory neurons. B. motor neurons. C. interneurons. D. skeletal muscle cells. E. Schwann cells.
How many weeks does prenatal development last in humans?
a. 31 b. 38 c. 40 d. 45 e. 52
When fat enters the duodenum, which hormone is stimulated to be released?
a. amylase b. secretin c. gastrin d. cholecystokinin