starch glycogen and cellulose

• Amylose:

  • Alpha glucose molecule
  • has 1-4 Glycosidic bonds
  • a store of glucose in plants
  • the structure of Amylose is in unbranched helix helix can coil so it is compact to fit a lot of glucose
  • insoluble - won't affect water potential
• Amylopectin:

  • Alpha glucose molecule
  • has 1-4 glycosidic bonds and some 1-6 glycosidic bonds
  • store of glucose found in plant cells
  • structure of amylopectin is branched molecule
  • branch structure increases surface area for rapid hydrolysis back into glucose
  • insoluble won't affect water potential
• glycogen:

  • Alpha glucose molecule
  • has 1-4 glycosidic bonds and some 1-6 glycosidic bonds
  • store of glucose
  • found in muscle and liver cells in animals
  • structure of glycogen is highly branched and large
  • branched structure increases surface area for rapid hydrolysis back into glucose due to more accessible ends
  • insoluble won't affect water potential
• Cellulose:

  • beta glucose molecule
  • has 1-4 Glycosidic bonds
  • found in plant cells essential for rigidity
  • structure of cellulose are long straight chains held parallel to one another held by many hydrogen bonds to form fibrils
  • many hydrogen bonds provide collective strength
  • insoluble wont affect water potential