When microbes are in the dark, they do not produce molecules called carotenoids because the PR proteins are bound to DNA. In the light, however, carotenoids are produced because the PR proteins unbind the DNA. Which of the following graphs best

summarizes these statements about carotenoid production in microbes?

A) ![7463|166x174](upload://e0hlyZg7EWDOBkpO5bV2vN9Igwy.jpg)
B) ![7464|162x160](upload://2Awqv2uLWhovA2TDLF71DmUs4AH.jpg)
C) ![7465|159x158](upload://xmv5RiT5lIqTlOj6LQ35DIS6Xdu.jpg)
D) ![7466|163x174](upload://gRPTqn0nm7dlQSnhzmHPBlneQ2u.jpg)


Answer: B

Biology & Microbiology

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