<prompt> Amino acid responsible for Thioredoxin reductase activation:SerineSelenocysteineCysteineAlanine  <response>: Ans. B. SelenocysteineSelenocysteine is seen in the active site of following Enzymes and ProteinsQThioredoxin reductaseGlutathione PeroxidaseIodothyronine DeiodinaseSelenoprotein P 