Emzyme Action Flashcards
Properties and functions of catalysts:
- Catalysts lower the energy input required for chemical reactions
- Catalysts take part in reactions but remain unchanged at the end of the reaction they catalyse
Enzymes are…
Biological catalysts which are essential for the normal functioning of every living cells
Hydrogen peroxide — oxygen & water
(Catalyse)
HPCOW
Enzymes are made of
Protein molecules
Active site of an enzyme molecule is the specific site where
The complimentary substrate molecule binds to the protein molecule - 1 substrate binds to 1 enzyme
Enzyme structure is essential to its function by
The lock and key mechanism
The word specific is applied to
Enzymes
The specificity of enzymes for their substrates is
The characteristic shape of enzyme molecules complementary to their substrate
The active site of an enzyme is specific to the molecular structure of the….
Substrate allowing them to combine like a lock and key
At the end of an enzyme reaction the product….
Detaches from the active site leaving the enzyme unaltered
- Degradation in enzymes
2. Chemical synthesis is enzymes
- Enzymes promote the chemical breakdown of complex molecules into similar ones - degradation - break down
- Enzymes promote the build up of similar molecules into complex ones - synthesis - build up
Example of a degradation enzyme:
Analyse or catalase
Starch ——– maltose
(Amylase)
SAM
Example of a synthesis enzyme:
Phosphate
Glucose 1 ---------- starch
(Phosphate)
(Phosphorylase)
G-1PPSEnzyme activity is affected by
Temperature and pH
At low temperature and pH enzymes are….
Inactive
Activity increases up to an…..
Optimum - (condition giving maximal enzyme activity)
