Biology

The correct answer is A.Glucose.

Both starch and cellulose are polysaccharides made up of glucose monomers. However, the way the glucose molecules are linked together differs between the two:

1.Starch: Made of glucose monomers linked by alpha-glycosidic bonds, which are easier for most organisms (like humans) to break down and digest.

2.Cellulose: Made of glucose monomers linked by beta-glycosidic bonds, which are much more difficult for most organisms to break down because they require specific enzymes that many organisms, including humans, lack. This is why cellulose is not digestible by humans but serves as important fiber in our diet.