Why can enzymes not be killed?

1
Draw and label a diagram to show how an enzyme
works. Label the substrate, enzyme, active site
Where are proteins made? Give some examples of
proteins.

• What reaction does protease catalyse?
• Where does this reaction happen?
• What conditions does the enzyme work best in?

2.5 Proteins

• What reaction does lipase catalyse?
• Where does this reaction happen?
• What conditions does the enzyme work best in?

• What reaction does amylase catalyse?
• Where does this reaction happen?
• What conditions does the enzyme work best in?

Why can enzymes not be killed?
Why are enzymes used in baby foods?

• What are the advantages of using enzymes in
  washing powders?

What two main factors can affect the rate at
which an enzyme works? 1. 2.
What is bile? Where is bile made? Where is bile
stored?
What are the disadvantages of using enzymes in
washing powders
What is biles job in relation to fats? .
Explain why a biological detergent doesnt work
well at 60C and why it works slowly at 10oC
What is biles job in relation to the small
intestine? Why is this important?
Why are enzymes needed to produce slimming
products?
2
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.
Draw and label a diagram to show how an enzyme
works. Label the substrate, enzyme, active site

• 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

2.5 Proteins

• 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 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

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 pre-digest baby food so
babies can get hold of more of the nutrients

• 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 two main factors can affect the rate at
which an enzyme works? 1. pH 2. Temperature
What is the protein bile? A strong alkali Where
is bile made? In the liver Where is bile
stored? In the gall bladder
What are the disadvantages of using enzymes in
washing powders May cause dermatitis May remove
more of the colouring from clothes than
non-biological powders. More expensive to produce.
What is biles job in relation to fats? Breaks UP
(emulsifies) large fats into smaller fat droplets
to increase the surface area for the enzyme
lipase to work on. .
Explain why a biological detergent doesnt work
well at 60C Enzymes are denatured dont fit
the active site of the substrate and why it works
slowly at 10oC Less kinetic energy so fewer
collisions
What is biles job in relation to the small
intestine? Why is this important? Neutralises the
stomach acid and makes chyme slightly alkali
providing the optimum conditions for the small
intestine enzymes to work at.
Why are enzymes needed to produce slimming
products? Carbohydrases are needed to turn starch
into glucose. Isomerase is needed to turn glucose
into fructose. As fructose is sweeter than
glucose less is needed to give the same sweet
taste, meaning fewer calories.