Cellulose, chitin, and peptidoglycan function as structural molecules and withstand pulling and pushing forces well. Which struc
tural feature is most directly responsible? a. Structural polysaccharides are built with β1, 4glycosidic linkages that are very strong.
b. Structural polysaccharides are built with β-1,4-glycosidic linkages, which are very resistant to hydrolysis.
c. Structural polysaccharides exist as highly branched helices.
d. Structural polysaccharides exist as sets of long, parallel strands that are linked to one another.
Active transport requires energy because it moves molecules across a membrane to a region of lower to higher concentration which is often against their concentration gradient or has an obstructing factor.
