enzymes at work: scenario #1
Post on 24-Apr-2022
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Enzymes at Work: Scenario #1
An important cause of the deterioration in flavor, texture, and
vitamin content of frozen fruits and vegetables during storage
is the action of hydrolytic enzymes released from the vacuoles
of the cells. Blanching prior to freezing improves the keeping
qualities of produce.
How do you suppose blanching works?
Ø deterioration: the process of making worse.
Ø hydrolytic enzymes: proteins that break chemical bonds through
the addition of water.
Ø vacuoles: a cell organelle (structure) that stores water, food,
and nutrients.
Ø Blanching: a quick dip in boiling water
Enzymes at Work: Scenario #2
Some fruits and vegetables turn brown when peeled because they
contain the enzyme catecholase, which catalyzes a reaction
between oxygen and a colorless compound, catechol. The
product of this reaction is benzoquinone, which forms the red
and brown pigments responsible for the browning. When
preparing fruit salads, some cooks sprinkle the sliced fruits
with lemon juice to prevent discoloration.
How might lemon juice act to prevent the browning of fruit?
Ø catalyzes: cause or accelerate a reaction.
Ø pigment: color.
Ø discoloration: the process of changing to a different, less attractive
color.
Enzymes at Work: Scenario #3
Commercial meat tenderizers often contain papain, a
proteolytic enzyme derived from papayas.
How might such products make meat more tender?
Ø Tenderizers: a substance that is rubbed onto meat or used as a marinade to soften the fibers.
Ø Proteolytic enzyme: an enzyme that digests protein
Enzymes at Work: Scenario #4
Meat tenderizers are sometimes used as a home remedy for
treating stings inflicted by the Portuguese Man-of-War.
Based on this information, what class of organic compounds
do you suppose the toxins released by the Portuguese Man-
of-War are from?
Ø inflicted: cause (something unpleasant or
painful) to be suffered by someone or something.
Ø Portuguese Man-of-War: a jellyfish.
Ø organic: made from carbon.
Enzymes at Work: Claim-Evidence-Reasoning Organizer
Group Members:
The Research Question from your Scenario:
Your Claim: (your best answer to the above question)
Your Evidence: (information to support your claim)
Your Justification of the Evidence: (discuss how
your evidence supports your claim)
Group Members: Scenario 1: Scenario 2: Record the research question here:
Record the research question here:
Your claim (your best answer to the question):
Your claim (your best answer to the question):
Use Evidence to Justify your Claim:
Use Evidence to Justify your Claim:
Group Members: Scenario 3: Scenario 4: Record the research question here:
Record the research question here:
Your claim (your best answer to the question):
Your claim (your best answer to the question):
Use Evidence to Justify your Claim:
Use Evidence to Justify your Claim:
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