Practice question
Question
Cryptochrome signaling requires which structural feature absent in photolyase?
Explanation
Pick B: C-terminal extension. Thinking through cryptochrome step by step rules out the lookalikes and leaves C-terminal extension. Skip these: A) PHR domain; C) FAD-binding site; D) Dimerization site. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.
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