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15
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Which enzyme makes apples turn brown?
Amylase
Polyphenol oxidase (PPO)
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15
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How can you stop apples from turning brown after cutting?
By putting lemon juice on them
By leaving them in the sun
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15
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If you put an apple in water after cutting it, will it stop it from browning?
Yes, it slows down the browning
No, it speeds up the browning
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15
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What happens when you cut an apple and leave it in the air?
It gets sweeter
It turns brown
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15
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What does vinegar do to slow down apple browning?
It freezes the apple
It makes the appleâs surface more acidic
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monster
Reset all scores!
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star
Double points!
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gift
Win 20 points!
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thief
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15
×
Why do apples turn brown when cut?
Because oxygen reacts with the appleâs enzymes
Because of sunlight
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15
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There are kinds of apples that turn brown slower than others.
True.
False.
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seesaw
Swap points!
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rocket
Go to first place!
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shark
Other team loses 20 points!
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thief
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15
×
What causes apples to turn brown after cutting them?
A chemical reaction with oxygen
The heat from the knife
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