This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Biochemistry
all the following are non-competitive inhibitors except ? 
Select and explain. 
A. arsenate, B. fluoroacetate, C. arsenate, D. disulfuram
A: arsenate
Answer: A: arsenate 
Explanation: Enzyme Inhibitors * Competitive inhibitors bind to the active site of an enzyme, competing with the substrate ex: arsenate ,oxamate,malonate, sulfonamide,methotrexate,ethanol,dicumurol * Noncompetitive inhibitors bind to another pa of an enzyme, causing the enzyme to change shape and making the active site less effective * Examples of inhibitors include toxins, poisons, pesticides, and antibiotics = iodoactate,NaF, fluroacetate, arsenate,cyanide, disulfuram ref : vasudevan 9th ed