Question

questions 4 through 7 refer to the following. different polysaccharides are used by plants for energy storage and structural support. the molecular structures for two common polysaccharides are shown in figure 1. starch is used by plants for energy storage, and cellulose provides structural support for cell walls. the monomer used to construct both molecules is glucose. based on figure 1, which of the following best compares the atomic structures of starch and cellulose? a starch is composed of carbon, hydrogen, and oxygen, while cellulose also contains nitrogen. b starch and cellulose are composed of repeating glucose monomers; however, in cellulose every other glucose monomer is rotated 180 degrees. c starch is composed of monomers that each have a ch2oh group while cellulose only has a ch2oh group on every other monomer. d starch and cellulose are composed of identical monomers and

Explanation:

Both starch and cellulose are polysaccharides made of glucose monomers. In cellulose, every other glucose monomer is rotated 180 degrees compared to starch, which affects their physical - chemical properties and functions. Starch is for energy storage and cellulose provides structural support. Both are composed of carbon, hydrogen, and oxygen only (no nitrogen in either), and both have $CH_2OH$ groups in their glucose monomers in different arrangements.

Answer:

B. Starch and cellulose are composed of repeating glucose monomers; however, in cellulose every other glucose monomer is rotated 180 degrees.