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Structure of enzymes
Enzymes are made of ____________. These
are made up of _________ _______.
Enzymes are ______________ ___________.
They ________ up reactions by lowering the
_____________ ________.
Enzymes have an _________ _______. This
is where the substrate joins.
The active site is _____________________
and ___________ to the corresponding
substrate.
Enzymes speed a reaction up but do not
________ it.
Words: Protein, specific, active site, change,
complementary, biological catalysts, amino acids,
activation energy, speed.
Bile
Where is it produced? ____________________
Where is it stored? _______________________
Where does it work? _____________________
Bile is an __________ liquid. It _____________
the acidic food from the ____________ and
makes it alkaline. It also ___________ fat. This
______________ the surface ______ for
enzymes to work upon.
Words: Emulsifies, increases, alkaline,
neutralises, area, stomach,
Stomach acid
Give two reasons why we have stomach acid
1. ________________________________
________________________________
2. ________________________________
________________________________
How does the stomach protect itself from acid
and enzymes?
______________________________________
______________________________________
Draw a diagram of how enzymes work here:
Sketch a graph of the effect of temperature on
enzyme action
Rate
of
reaction
Temperature
B2.3 Enzymes
Enzymes in digestion
For each enzyme identify where it is produced, where it
works and what it breaks down and the products.
Amylase
Produced in: __________________________________
Works in: ____________________________________
Breaks down and products produced:
____________________________________________
_______________
Proteases
Produced in: _________________________________
Works in: ____________________________________
Breaks down and products produced:
____________________________________________
____________________________________________
Describe this graph:
_______________________________________
_______________________________________
_______________________________________
Explain this graph:
_______________________________________
_______________________________________
_______________________________________
What is meant by the term ‘optimum temperature’?
_______________________________________
_______________________________________
Identify the optimum pH of each enzyme:
Lipases
Produced in: __________________________________
Works in: ____________________________________
Breaks down and products produced:
____________________________________________
____________________________________________
What is isomerase?
____________________________________________
Pepsin: _________________________________
Salivary amylase: _________________________
Alkaline phosphatase: ______________________