The Functions of Some Proteins Change Depending on Whether They

question 44

Multiple Choice

The functions of some proteins change depending on whether they are in the light or in the dark they are photoreceptive (PR) proteins. A team of scientists recently determined that PR proteins bind to DNA to regulate gene expression in microbes. Answer the following three questions about this scenario.
-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

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Definitions:

Toluene

An aromatic hydrocarbon commonly used as an industrial solvent, known chemically as methylbenzene with the formula C7H8.

Major Organic Product

The chief result of an organic synthesis process, distinguished by its predominance among other products generated.

Sequence Of Reagents

The ordered list of chemicals used in a step-by-step chemical reaction to achieve a certain product.

Conversion

The process of changing the chemical structure of a substance to another form, often implemented in synthesis and reaction mechanisms.