Explain the principle of enzymatic reaction between enzyme and substrate.
- The reaction is based on lock and key.
- The enzyme reacts on the substrate.
- The substrate molecules bind to the active site of the enzyme
- to form enzyme-substrate complex.
- The enzyme remains unchanged at the end of reaction. / The enzyme can be used again.
- Products are produced at the end of reaction.
Decribe the production of extracellular enzyme.
- The information for the synthesis of enzymes is carried by DNA in nucleus.
- The information is copied and carried / transferred to ribosome through RNA / mRNA.
- The information is used to synthesize protein in the ribosome.
- Proteins that are synthesized in the ribosome are transported through the spaces between rough endoplasmic reticulum.
- Protein depart from structure rough endoplasmic reticulum wrapped in transport vesicles the buds off the side of rough endoplasmic reticulum.
- These transport vesicles fused with the membrane of golgi apparatus to be sorted and modified.
- Modified protein is packed into secretory vesicle.
- Secretory vesicles bud off from golgi apparatus membrane and sent to plasma membrane.
- Secretory vesicles will release the modified protein / enzyme outside the cell (as extracellular enzyme).
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