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Draw and label a diagram to show how an
enzyme works. Label the substrate, enzyme,
active site
Where are proteins made?
What reaction does protease catalyse?
Give some examples of proteins.
Where does this reaction happen?
What conditions does the enzyme work
best in?
What reaction does lipase catalyse?
What reaction does amylase catalyse?
Why can enzymes not be killed?
Why are enzymes used in baby
foods?
Where does this reaction happen?
What conditions does the enzyme work
best in?
What is bile?
What are the disadvantages of
using enzymes in washing powders
Where does this reaction happen?
Where is bile made?
Where is bile stored?
What two main factors
can affect the rate at
which an enzyme works?
1.
2.
What is bile’s job in relation to fats?
.
What conditions does the enzyme work
best in?
What are the advantages of using
enzymes in washing powders?
Explain why a biological detergent doesn’t work well at 60°C:
and why it works slowly at 10oC:
Why are enzymes needed to produce slimming products?
What is bile’s job in relation to the small intestine? Why is this
important?
Draw and label a diagram to show how an
enzyme works. Label the substrate, enzyme,
active site
Why can enzymes not be killed?
Enzymes were never living to start with
(never carried out MRS NERG), they are
just strands of DNA / protein.
Why are enzymes used in baby
foods?
Protease enzymes are used to predigest baby food so babies can get
hold of more of the nutrients
Where are proteins made?
At ribosomes in all body cells
Give some examples of proteins.
Keratin in nails and hair, melanin in skin
pigment, haemoglobin in red blood cells,
enzymes, mucous, cilia, gastric juices.
What reaction does amylase catalyse?
Starch into glucose
Where is the enzyme secreted from?
Salivary glands, pancreas and small
intestine
What conditions does the enzyme work
best in?
Weak alkali – pH 8
What is the protein bile?
A strong alkali
Where is bile made?
In the liver
Where is bile stored?
In the gall bladder
What two main factors
can affect the rate at
which an enzyme works?
1. pH
2. Temperature
What reaction does protease catalyse?
Proteins into amino acids
Where is the enzyme secreted from?
Stomach, pancreas and small intestine
What conditions does the enzyme work
best in?
Strong acid – pH 2
What reaction does lipase catalyse?
Fats into fatty acids and glycerol
Where is the enzyme secreted from?
Small intestine and pancreas
What conditions does the enzyme work
best in?
Weak alkali – pH 8
What are the advantages of using
enzymes in washing powders?
Lower temperatures used so less
fossils fuels used to generate
electricity and fewer carbon emissions
produced.
What are the disadvantages of
using enzymes in washing powders
May cause dermatitis
May remove more of the colouring
from clothes than non-biological
What is bile’s job in relation to fats?
Explain why a biological detergent doesn’t work well at 60°C:
powders.
Breaks
UP
(emulsifies)
large
fats
into
Enzymes are denatured – don’t fit the active site of the
More expensive to produce.
smaller fat droplets to increase the
substrate
surface area for the enzyme lipase to
and why it works slowly at 10oC:
work on.
Less kinetic energy so fewer collisions
.
What is bile’s job in relation to the small intestine? Why is this
Why are enzymes needed to produce slimming products?
important?
Carbohydrases are needed to turn starch into glucose.
Neutralises the stomach acid and makes chyme slightly alkali
Isomerase is needed to turn glucose into fructose. As
providing the optimum conditions for the small intestine enzymes to
fructose is sweeter than glucose less is needed to give the
work at.
same sweet taste, meaning fewer calories.