<prompt> This is an example of:Competitive inhibitionNon-competitive inhibitionBothNone  <response>: Competitive Inhibitors: In competitive inhibition, the inhibitor I binds to the substrate-binding portion of the active site thereby blocking access by the substrate. The structures of most classic competitive inhibitors, therefore, tend to resemble the structure of a substrate, and thus are termed substrate analogs. Inhibition of the enzyme succinate dehydrogenase by malonate illustrates competitive inhibition by a substrate analog.Key Concept:Competitive inhibition occurs when the inhibitor binds reversibly to the same site that the substrate would normally occupy and, therefore, competes with the substrate for that site.Ref: Lippincotts illustrated reviews for biochemistry, 7th edition. 