Practice question
Question
Loss of phenylalanine ammonia-lyase (PAL) activity leads to:
Explanation
Pick B: Decreased lignin. Thinking through PSS- Sec G- Sec metabolites step by step rules out the lookalikes and leaves Decreased lignin. Skip these: A) Increased caffeine; C) Increased lignin; D) Increased terpenes. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.
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