Summary
Starch has alpha-glucose helices for storage; cellulose has straight beta-glucose chains forming strong fibres.
In depth
Alpha-glucose chains in starch coil into helices that store compactly and are easily hydrolysed. In cellulose every other glucose is flipped, so chains are straight and hydrogen bond with neighbours, forming microfibrils with high tensile strength comparable to steel per weight.
Starch is for storage and cellulose for support.
Hydrogen bonds between neighbouring cellulose chains bundle about 36 chains into microfibrils with a tensile strength close to steel by weight, while starch stays flexible and soluble. Cotton is almost pure cellulose, and paper, wood and linen are cellulose-rich.
Dietary fibre is cellulose and other polysaccharides that are not digested, and it adds bulk and feeds gut bacteria that make short-chain fatty acids. Resistant starch behaves similarly.
Comparison: starch has alpha 1-4 and 1-6 bonds and is found in plastids, cellulose has beta 1-4 bonds and is in cell walls; plants make both from glucose.
Frequently asked questions
What is Starch vs Cellulose?
Starch has alpha-glucose helices for storage; cellulose has straight beta-glucose chains forming strong fibres.
Which area of biology covers Starch vs Cellulose, and how advanced is it?
Starch vs Cellulose is one of the 51 topics in Biomolecules & Biochemistry. It is rated Intermediate, so it suits learners who already know the core vocabulary. Related topics in this area include Polysaccharides, Carbohydrates, Glycosidic Bond.
Can you give an example of Starch vs Cellulose?
Dietary fibre is mostly cellulose, which passes through the gut and aids movement of food.
What should I learn before Starch vs Cellulose?
Work through the Beginner topics in Biomolecules & Biochemistry first, such as Water Properties, Carbon Chemistry, Carbohydrates, then return to Starch vs Cellulose. Intermediate topics assume the Beginner vocabulary.
What topics are related to Starch vs Cellulose?
The closest topics to Starch vs Cellulose are Polysaccharides, Carbohydrates, Glycosidic Bond, Saturated and Unsaturated Fats. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Starch vs Cellulose?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Starch vs Cellulose. To practise the whole of Biomolecules & Biochemistry, use the Biomolecules & Biochemistry quiz.
How is Starch vs Cellulose different from Polysaccharides?
Starch vs Cellulose: Starch has alpha-glucose helices for storage; cellulose has straight beta-glucose chains forming strong fibres. Polysaccharides: Long chains of sugar units, including starch, glycogen, cellulose and chitin, used for storage and structure. Read both side by side and note what each one explains.
How should I study Starch vs Cellulose step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Polysaccharides and explain the difference aloud. Finally, take the Biomolecules & Biochemistry quiz and come back to this page for any question you miss.