1-A: Biological Molecules Flashcards
What is the definition of a monomer?
A monomer is a repeating unit from which polymers are made
Describe the biochemical test for non- reducing sugars. (4)
- Heat sample with dilute HCl
- Neutralise with Na hydrocarbonate
- Heat with Benedict’s reagent
- Traffic lights
Which monomer makes up glycogen!
a-glucose
Which monomer makes up cellulose?
B-glucose
Imagine the image of a condensation reaction.
Which two monomers make up the disaccharide Maltose?
a-glucose + a-glucose
Imagine the condensation reaction diagram.
O forms in the middle
How are a-glucose and B-glucose different? Which is which?
The positions of the hydrogen and hydroxyl groups on the carbon one atom are inverted.
B-glucose alternates
How is starch adapted for its function? (3x2)
- helical ( a-glucose spirals) compact
- insoluble doesn’t affect water potential
- large molecule cannot leave cell
Describe the structure of cellulose
- straight (B-glucose) chain
- hydrogen bonds between chains
- strong fibrils
Describe the structure and function of glycogen.
- animal energy storage molecule (a-glucose)
- branched chain compact *efficient hydrolysis for respiration *
Which two monomers make up the disaccharide sucrose?
glucose + fructose
