DAT Bootcamp Molecules and Fundamentals of Biology Practice Test 2026 - Free Biology Practice Questions and Study Guide

Starch is built from many units of glucose linked together by alpha-glycosidic bonds, so the repeating unit is glucose. In plants, starch consists of α-D-glucose monomers connected mainly by α-1,4 bonds in the chains and α-1,6 bonds at branch points in amylopectin. Fructose is a different sugar (a ketohexose) not used to form starch polymers; galactose and mannose are hexoses that differ in the orientation of hydroxyl groups and are not the repeating units in starch.