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GCSE
Biology paper 2
Factors that affect enzymes
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Mabli Collyer
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Cards (18)
What factors affect the functioning of enzymes?
Temperature
and
pH
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How does temperature affect the rate of enzyme-controlled reactions?
Higher temperature increases
reaction rate
initially
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What happens to enzyme activity after 37°C?
The rate of
reaction
starts to drop rapidly
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Why does the rate of reaction drop at high temperatures?
High temperatures break bonds in
enzymes
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What is denaturation in enzymes?
Loss of enzyme's
functional
shape
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At what temperature does denaturation occur for the enzyme discussed?
Around
45°C
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What is the optimum temperature for the enzyme mentioned?
37°C
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Do different enzymes have the same optimal temperature?
No
, different enzymes have different
optimal
temperatures
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What does pH measure?
Acidity
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How does pH affect enzyme activity?
Extreme pH lowers the rate of
reaction
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What happens to the active site of an enzyme at extreme pH levels?
It changes shape and may
denature
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What is the optimal pH for most enzymes in the body?
Around 7 (
neutral
)
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What is the optimal pH for stomach enzymes?
Around 2
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What are the effects of temperature and pH on enzyme activity?
Temperature increases reaction rate until
denaturation
Denaturation occurs around
45°C
Optimal temperature for
enzymes
is around
37°C
pH affects reaction rate;
extreme
pH can cause denaturation
Optimal pH for most enzymes is around 7
Stomach enzymes have an optimal pH of around 2
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What platform is mentioned for learning and tracking progress?
A learning platform with
videos
and questions
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What is provided in the description for the video?
A link to the lesson for the video
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What is arranged in a playlist for the subject?
All
videos
for
the
subject
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What is the purpose of the learning platform mentioned?
To watch
videos
and practice learned material
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