Which one of the following statements correctly defines active site?
AThe active site is a site on the enzyme molecule where specific substrate molecules bind.
BThe active site is a site on the substrate molecule where specific enzyme molecules bind.
CThe active site is a site on the substrate molecule where specific product molecules bind.
AThe active site is a site on the enzyme molecule where specific substrate molecules bind.
BThe active site is a site on the substrate molecule where specific enzyme molecules bind.
CThe active site is a site on the substrate molecule where specific product molecules bind.