LIFE SCIENCE

Detailed explanation-1: -decomposition reaction. Decomposition reactions are characterized by a larger molecule (e.g. starch) being broken down into smaller molecules (e.g. glucose) as a catabolic reaction.

Detailed explanation-2: -To be really useful for our cells, starch needs to be broken down into its subunits, or monomers. These monomers are multiple repeats of the simple sugar glucose. Figure 2 demonstrates the breakdown of starch into glucose, an example of a catabolic reaction.

Detailed explanation-3: -In cells, catabolic processes break down polysaccharides such as starch, glycogen, and cellulose into monosaccharides (glucose, ribose and fructose, for example) for energy.