Bonds in cellulose that make it resistant to digestion is:: (A) b1-4, (B) a1-6, (C) b1-6, (D) a1-6
Answer is A. Cellulose is the chief constituent of plant cell walls. It is insoluble and consists of b-D -glucopyranose units linked by b,1-4 bonds to form long, straight chains strengthened by cross-linking hydrogen bonds. Mammals lack any enzyme that hydrolyzes the b1 -4 bonds, and so cannot digest cellulose. Ref: Harper 28th edition, chapter 14.