Starch vs Cellulose: what is the difference?
Starch and cellulose are both glucose chains, but a starch chain's alpha bonds digest and a cellulose chain's beta bonds do not, so cellulose is fibre.
Sources and notes
- The sentence under the titlefrom sourceMoleculeFinder comparison notesThe pair's answer line.
- The two drawingsfrom sourceMoleculeFinder curated, drawn by RDKitTwo units of each chain, not the whole molecule, drawn the same way round; the amber marks the linkage that joins them.
- What is highlightedfrom sourceMoleculeFinder curatedOne line under each drawing, written from the atoms the amber marks.
Side by side
| Starch | Cellulose | |
|---|---|---|
| Where each turns upEditorial MoleculeFinder food and product lists |
| Not on our lists |
| FamilyEditorial MoleculeFinder curated | Polysaccharides | Polysaccharides |
| Everyday groupEditorial MoleculeFinder curated | Food & flavor | Plant |
Sources and notes
- Where each turns upfrom sourceMoleculeFinder food and product listsEach amount is an editorial figure from our lists, not a measurement of any one product. Each mark is set by hand on the list, never inferred.
- Familyfrom sourceMoleculeFinder curated
- Everyday groupfrom sourceMoleculeFinder curated
In more detail
Neither contains anything but glucose. Starch links its glucose units with alpha bonds, which human amylase can cut, so starch is food. Cellulose links them with beta bonds, which flips every second unit over and produces a flat ribbon that human enzymes cannot touch, so cellulose is dietary fibre. Those flat ribbons stack and hydrogen-bond into fibres, which is why cellulose is structural in plants and starch is not: one is the plant's warehouse and the other is its scaffolding. Cows and termites manage cellulose only by hosting microbes that carry the missing enzyme.
Sources and notes
- The paragraphfrom sourceMoleculeFinder comparison notes
Questions
- What is the difference between Starch and Cellulose?
- Starch and cellulose are both glucose chains, but a starch chain's alpha bonds digest and a cellulose chain's beta bonds do not, so cellulose is fibre.
Sources and notes
- The answersfrom sourceMoleculeFinderThe first is the pair's answer line; the others are read off the table above.