Question: When the concentration of flavin mononucleotide increases: Need Assignment Help? Question options: a) it binds to the riboswitch of RNA, and mRNA changes its conformation to prevent the formation of the functional mRNA. b) it binds to the promoter site to decrease affinity to RNA polymerase and blocks RNA transcription. c) it binds to the operator site to decrease affinity to RNA polymerase and blocks RNA transcription. d) the riboswitch of mRNA binds to FMN, and mRNA changes its conformation to increase mRNA degradation. e) it binds to the riboswitch of mRNA transcript, and mRNA changes its conformation to prevent the formation of the functional mRNA.