Transport forms of sugars are commonly made by linkingtwo monosaccharides together to form adisaccharide(Greekdi,“two”). Disaccharides serve as effective reservoirs of glu-cose because the enzymes that normally use glucose in theorganism cannot break the bond linking the two monosaccha-ride subunits. Enzymes that can do so are typically presentonly in the tissue that uses glucose.38partITheMolecular Basis of Liferav83074_ch03_033-058.indd38rav83074_ch03_033-058.indd389/4/1211:43 AM9/4/1211:43 AM
