In a direct ELISA test to screen for drugs in a patient's urine, what is the third step in the test process?

A) substrate for the enzyme is added
B) enzyme-labeled antibodies against the drug being tested is added
C) the patient's urine sample is diluted
D) antibody against the drug being tested is added


B

Biology & Microbiology

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A(n) ___________ has been established if more solute is located outside of the cell than inside of the cell.

a. concentration gradient b. diffusion gradient c. active transport gradient d. facilitated gradient

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Which two molecular techniques are used in DNA profiling to generate data included in the FBI's CODIS database?

What will be an ideal response?

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a. green fluorescent protein / lacZ b. lacZ / green fluorescent protein c. reporter gene / target gene d. target gene / reporter gene

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