The Functions of Some Proteins Change Depending on Whether They

question 59

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.
-A single PR protein is composed of four identical polypeptide chains that act together to bind DNA. What is the highest level of protein structure that the PR proteins have?

• A) primary
• B) secondary
• C) tertiary
• D) quaternary

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Definitions:

Just War Doctrine

A theory in international relations that outlines the conditions under which a war can be morally justified.

Right Intention

The ethical principle that actions should be guided by good or morally correct purposes.

Properly Authorized

Officially or formally approved or sanctioned, according to the relevant laws or standards.

Control Orders

Legal measures imposed by governments to restrict the freedom of individuals for security reasons, often without a prior trial.