challenge: What effect does phosphorylation of methionine—tRNA ligase have during oxidative stress?
  
  A. It promotes promiscuity, aminoacylating methionine to non-Met tRNAs
  B. It triggers a decrease in methionine availability within the cell
  C. It enhances the enzyme's specificity for methionine aminoacylation
  D. It inhibits the enzyme's activity, leading to cell damage
  Answer: 