Biological Molecules


Why is starch good for storage?

3 years ago


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Jerald Sauer

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Starch is an ideal storage molecule because:

  • it is insoluble and therefore doesn't affect the water potential of the cell
  • it is large and therefore cannot diffuse from the cell
  • it is compact and therefore much can be stored in a small space
  • it is branched and has many ends and therefore can be hydrolysed rapidly by many enzymes at the same time
  • it releases alpha-glucose when hydrolysed - this is easily transported and can be directly respired

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