Practice question
Question
Light perception by cryptochrome alters conformation of which region?
Explanation
Go with B — C-terminal extension. Under cryptochrome, this is the standard explanation you’d use in class: it names the real driver or definition, while the rest are nearby but wrong. Not these: A) N-terminal PHR; C) PAS domain; D) DNA-binding domain. When two options sound similar, choose the one that matches the textbook definition most tightly.
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