enzymes

• enzyme + substrate into enzyme + substrate complex into enzyme + products
• the active site is folded into complex 3D shapes that allow smaller molecules to fit into them.
• it is very specific because substrate with the correct shape can fit into the active site
• the lock and key hypothesis says that the shape of the enzyme's active site is specific for the shape of its substrate molecules.
• the enzyme and substrate form a complex and a reaction takes place.
• they bound forms between them to make the new product.
• product molecules doesn't fit into the active site as well so it is released from the enzyme
• ENZYME CORE PRACTICAL:

  aim: to investigate the effect of pH on amylase activity.

  amylase breaks down starch into simple sugars.

  the iodine test identifies the presence of starch.

  it doesn't react with sugar

  the iodine solution is usually yellow/orange.

  when there is presence of starch, it turns black.

  when there is no presence of starch, it turns brown.