9. Relating Structure to Function
1. Glucose – OH groups make it water soluble,
easily coverted to pyruvate in glycolysis
2. Starch (amylose) – easily broken down into
glucose, linear structure allows for close
packing, hence good energy store
3. Glycogen – several branches of the carbohydrate
can be cut off at once to supply energy quickly
4. Cellulose – hydroxyl groups form hydrogen
bonds with neighbouring chains, holding the
chains firmly together forming microfibrils with
high tensile strength
10. Summary (P13-15)…
Carbohydrate Type of
molecule
Component
monomers
Structure Function
and
location
Glucose Monomer α or ß glucose Linear or ring Aerobic
respiration,
bloodstream
11. Test next lesson…
• Be able to draw both glucose isomers
• Be able to show a glycosidic bond
• Be able to show hydrolysis and condensation
reactions
12. 1) Choose colours for C, H , O
• Make 2 molecules of alpha glucose
• Join together by a glycosidic bond
• Join a 3rd alpha glucose to make AMYLOSE
13. Modelling carbohydrates…
• Select a colour for C, H, O
• Use grey plastic attachments to show bonds
1. Make a molecule of α and ß glucose
2. Make a molecule of maltose with a 1,4-
glycosidic bond
3. Make a 1,4 glycosidic bond between 2 molecules
of ß glucose
Draw each structure on paper next to your model