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Paper 1 Content
Bioenergetics
Photosynthesis
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ameerah!
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Cards (23)
What is the main process that plants use to trap light energy?
Photosynthesis
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What type of reaction is photosynthesis?
Endothermic
reaction
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From what does a seedling derive its energy to grow?
Light energy
trapped by
photosynthesis
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Where does photosynthesis take place in a plant?
In the
leaves
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What green chemical in leaves absorbs light energy?
Chlorophyll
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What are the inputs for the photosynthesis reaction?
Carbon dioxide
and
water
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What is produced as a byproduct of photosynthesis?
Oxygen
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What is the word equation for photosynthesis?
Carbon dioxide
+ water →
glucose
+ oxygen
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What is the chemical formula for carbon dioxide?
CO<sub>2</sub>
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What is the chemical formula for water?
H<sub>2</sub>O
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What is the chemical formula for glucose?
C<sub>
6
</sub>H<sub>
12
</sub>O<sub>
6
</sub>
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What is the chemical formula for oxygen?
O<sub>2</sub>
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What happens to the rate of photosynthesis when light intensity is increased?
The rate of photosynthesis increases
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What does it indicate if increasing light intensity increases the rate of photosynthesis?
Light intensity was a
limiting factor
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What happens when light intensity is increased beyond a certain point?
The
rate of photosynthesis
levels off
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What is the next limiting factor after light intensity?
Carbon dioxide
level
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What happens to the rate of photosynthesis when carbon dioxide levels are increased?
The rate of photosynthesis
increases
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What does it indicate if increasing carbon dioxide levels increases the rate of photosynthesis?
Carbon dioxide was a
limiting factor
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What is one factor that can affect the rate of photosynthesis?
The amount of
chlorophyll
in the leaf
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How does temperature affect the enzymes involved in photosynthesis?
Higher temperatures increase enzyme
activity
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What happens to enzymes at very high temperatures?
They
denature
and
activity
falls
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What are the factors that affect the rate of photosynthesis?
Light intensity
Carbon dioxide level
Amount of
chlorophyll
Temperature
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What is the overall process of photosynthesis?
Light energy
is absorbed by
chlorophyll
Carbon dioxide
and water are taken in
Glucose and oxygen are produced
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