Starch and cellulose ________.

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Question: Starch and cellulose ________.

There are no answer options provided in the data for this question, so we cannot analyze each listed choice. In a typical multiple-choice setup, options might present statements about the chemical nature or structure of starch and cellulose for comparison.

If the intended complete option were: "are polymers of glucose," we can reason through why that statement is correct and how it aligns with known biochemistry.

- Starch and cellulose are both polysaccharides, meaning they are long chains made up of glucose units. Their monomer is glucose, connected through glycosidic bonds, which is the core reason this statement would be true.
- The key distinction between the two lies in the type of glycosidic linkage: starch contains mainly alpha-1,4 linkages (and some alpha-1,6 in branches, as in amylopectin), whereas cellulose contains beta-1,4 linkages. This difference in linkage leads to very different three-dimensional structures and properties, despite both being glucose polymers.
- Because the monomer is glucose in both cases, the general claim that they are polymers of glucose is accurate; the differences in linkage (alpha vs beta) explain why starch is digestible by humans (via alpha-amylase) and cellulose is not (humans lack cellulase).
- If a choice claimed otherwise, such as asserting that one is not a polymer of glucose or that they are composed of different monosaccharides, that would be incorrect because the fundamental building block for both is glucose, and their polymer nature is due to repeated glucose units.

In summary, absent the actual options, the statement that starch and cellulose are polymers of glucose would be correct based on their classification as polysaccharides built from glucose monomers, with the critical caveat that their biological properties arise from the type of glycosidic bond and resultant structure.

BIOL-10-20048-S25 Lecture Exam 1- Monday 2/24

Starch and cellulose ________.

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