Suppose that the team of scientists conducted the following experiment: They mixed the PR proteins with DNA in a test tube and measured the amount of protein that bound to the DNA after 10 minutes under variable amounts of light. What was the independent

variable in their experiment?

A) the amount of light that they exposed the test tube to
B) the amount of PR proteins bound to DNA
C) the type of PR proteins used in the experiment
D) the amount of time the light was exposed to the test tube


Answer: A

Biology & Microbiology

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