AQA Year 1 Unit 1: biomolecules Questions and Answers | 100% Pass
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Course
AQA
Institution
AQA
AQA Year 1 Unit 1: biomolecules
Questions and Answers | 100% Pass
what is a monomer - Answer-A monomer is a small unit that can join together repetitively to form a
larger molecule / polymer.
what is a polymer - Answer-large number of monomer units joined together
What is the monomer of carboh...
what is maltose made from - Answer✔✔-two alpha glucose molecules
what is lactose made from - Answer✔✔-glucose and galactose
what is the difference between alpha and beta glucose - Answer✔✔-alpha glucose has the H above the
plane on carbon one, and beta glucose has the H below the plane on carbon 1.
how is glycogen made - Answer✔✔-many alpha glucose join by 1,4 glycosidic bonds to make a coiled
chain, with 1,6 glycosidic bonds forming branches.
how is starch made - Answer✔✔-amylose is coiled chains of alpha glucose joined by 1,4 glycosidic bonds
formed in a condensation reaction.
amylopectin is branched chains of beta glucose joined by 1,6 glycosidic bonds formed in a condensation
reaction.
how is cellulose made - Answer✔✔-every other beta glucose molecule is flipped as they join together via
1,4 glycosidic bonds. Many long straight chains of cellulose attract to each other via hydrogen bonds able
to be formed due to the closeness of each strand and that each strand contains every other glucose
rotated.
structure and function of glycogen - Answer✔✔-Glycogen is a carbohydrate made from many alpha
glucose joined together by 1,4 and 1,6 glycosidic bonds. It has a coiled and compact structure making it
excellent for storing a lot of glucose molecules in a small space. It has many branches so many ends
/large surface area for action by enzymes to hydrolyse glycosidic bonds and release glucose molecules
quickly for respiration. It is an insoluble polysaccharide that can be stored in cells without affecting water
potential and so not cause osmosis. Glycogen is a energy storage molecule.
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