Question: What is the reason for the lower S-lignin content in the brown midrib-3 (bm3) maize mutant compared to normal maize?
(A) Downregulation of caffeate O-methyltransferase (COMT) activity
(B) Upregulation of caffeate O-methyltransferase (COMT) activity
(C) Increase in S-lignin content
(D) Absence of caffeate O-methyltransferase (COMT) activity
Answer: (A) Downregulation of caffeate O-methyltransferase (COMT) activity