Uses of enzymes
Go through this presentation.
Use the information and that from
the textbook to then help you
complete the crossword puzzle.
Making use of enzymes
• Some microbes produces
enzymes that pass out of
cells. These enzymes
have many uses in the
home and industry.
• What might be the role of
enzymes which are used
in biological detergents?
Enzymes in biological detergents help remove stains.
The enzymes are coated with a special wax that melts in the
wash, releasing the enzymes. Once the stains have been
broken down, they are easier for the detergent to remove.
 Proteases break down proteins in stains such as grass,
blood and sweat.
 Lipases break down stains containing fat and oil.
Advantage of biological
detergents
• Biological detergents
are more effective at
low temperatures
than other types of
detergents.
• This means less
energy is wasted
heating water to
higher temperatures.
New
facts
Making baby food
• Proteases are used to
predigest some baby
foods.
• How might
predigesting baby
food benefit a baby?
• Makes it easier for its
digestive system to
absorb amino acids
etc
New
facts
Making glucose syrup
Carbohydrases are used
to convert starch into
glucose syrup used in
many foods.
Starch
glucose
This is also the starting
point for making ethanol
from plants.
New
facts
Making fructose syrup
• Sometimes glucose
syrup is then treated
with isomerase
enzyme to make
fructose syrup.
glucose
fructose
New
facts
Making fructose syrup
• Glucose + fructose contain
the same amount of energy,
but fructose is much
sweeter.
• How might this fact be
exploited by food
manufacturers?
• Smaller amounts of fructose
are needed than glucose to
sweeten foods. This means
less calories are added
which is great for slimming
foods.
New
facts
Advantages and disadvantages of
enzymes
Advantages
• Work at low
temperatures and
pressures (saving
energy and costs).
Disadvantages
• Denatured by higher
temperatures and
extreme pH.
• Expensive to
purify/produce.
Apply +
review
Homework
• Now read the pages from the textbook.
• Complete the uses of enzymes crossword.