Post-Translational Regulation of an Enzyme's Activity,such as Glutamine Synthetase,can Be

Multiple Choice

Post-translational regulation of an enzyme's activity,such as glutamine synthetase,can be finely controlled at varied levels due to

A) the varied strengths metabolite-regulating compounds can have with the enzyme such as hydrogen bonding, covalent bonding, and van der Waals attractions.
B) having multiple independently functional subunits.
C) the structural strength enzymes have once properly folded compared to short-lived and easily degradable transcripts during translational regulation.
D) weak chemical modifications of the enzyme rather than harsh protein-protein or protein-DNA interactions.