Practice question
Question
COP1 protein functions mainly as:
Explanation
Pick C: E3 ubiquitin ligase. Thinking through PHYTOCHROME step by step rules out the lookalikes and leaves E3 ubiquitin ligase. Skip these: A) Transcription factor; B) Kinase; D) Photoreceptor. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.
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