試題詳解

複選題
17. Control over nitrogenase activity is accomplished by which of the following ?:
(A) ATP serves as an allosteric activator,
(B) AMP serves as an allosteric inhibitor,
(C) NH₄⁺ prevents expression of the genes that encode nitrogenase,
(D) phosphorylation prevents activity,
(E) none of the above.