4819618
Description
Flashcards by Bee Brittain, updated more than 1 year ago
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Created by Bee Brittain
almost 9 years ago
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| Question | Answer |
| What monosaccharide is cellulose made of? | B-Glucose |
| Where is cellulose found? | Cellulose is found in plant cell walls |
| What property of cellulose makes it fit to be a component in plant cell walls? What 3 reasons are there as to why it has this property? | Cellulose is very strong. This is because: 1) It forms straight, long chains that run parallel to each other, allowing strong H bonds to form between the chains. 2) Every other monomer rotates 180 degrees, meaning more hydrogen bonds can form between the hydroxyl groups. 3) The cellulose polysaccharides group together to form microfibrills, this makes cellulose fibrous and strong. |
| What is glycogen nicknamed as? | "Animal Starch" |
| Glycogen doesn't effect water potential in cells, why? | Because it is insoluble |
| What property of glycogen makes it good for animals who use a lot of energy, but don't have much room to store it? | It is compact |
| Compared to starch, why is glycogen better at fast release energy? | Glycogen has more branches than starch. This means that when it gets hydrolysed and broken down, it happens faster as the enzymes have a larger surface area to act on at the same time. Meaning faster hydrolysis into its glucose monomers. |
| Where is starch found? | In plants (as small granules) |
| What monomer makes up starch? | a-glucose |
| Starch is insoluble, what does this mean? | It means it doesn't effect the water potential in a cell, similar to glycogen. |
| What is the main use of starch in plants? | It is an energy storage |
| Starch can be unbranched or branched. Why? | It has 1-4 and 1-6 glycosidic links between the monomers. |
| If starch is branched, what does this mean? | It has ends that make its surface area a little bigger so it can be acted upon by enzymes. |
| If starch is unbranched, what happens to the chain? | The chain coils into a tight helix, this makes it very compact and isn't broken down as easily, providing long term storage |
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