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GCSE
Biology paper 1
Photosynthesis
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Created by
Mabli Collyer
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Cards (25)
What process must a plant carry out to grow and survive?
Photosynthesis
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Where does photosynthesis take place in a plant?
In the leaves, specifically in
chloroplasts
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What pigment in chloroplasts absorbs light?
Chlorophyll
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What does chlorophyll absorb from the environment?
Light energy
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What are the reactants used in photosynthesis?
Carbon dioxide
and
water
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What is the chemical equation for photosynthesis?
6
CO2
+ 6 H2O →
C6H12O6
+ 6 O2
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Why is light written above the reaction line in the photosynthesis equation?
Because the reaction requires
light energy
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What type of reaction is photosynthesis classified as?
Endothermic
reaction
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How is energy transferred to chloroplasts during photosynthesis?
By light from the
environment
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How does carbon dioxide enter the leaves?
Through the
stomata
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How is water transported to the leaves?
Via the
xylem
from the
roots
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What is the primary product that plants want from photosynthesis?
Glucose
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What do plants sometimes use the oxygen produced in photosynthesis for?
For
respiration
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What are the five main uses of glucose in plants?
Respiration
,
cellulose
, starch, amino acids, oils
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How does glucose function in plant respiration?
It releases energy when
broken
apart
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What is cellulose made from?
Combined
glucose
molecules
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What is the purpose of starch in plants?
Long-term storage of
glucose
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Why do plants store starch instead of glucose?
Starch is more
compact
and
insoluble
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When do plants typically break down starch to glucose?
When
photosynthesis
is low, like at night
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How do plants make amino acids?
By combining
glucose
with
nitrate ions
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What do plants use amino acids to produce?
Proteins
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What is the final use of glucose mentioned in the material?
Making
oils
and
fats
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How does the growth rate of plants relate to photosynthesis?
It
depends
on the rate of
photosynthesis
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What factors affect the rate of photosynthesis?
Light intensity
Temperature
Carbon dioxide concentration
Amount of
chlorophyll
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What resources can be found on the Cognito website?
Videos
Questions
Flashcards
Exam style questions
Past papers
Progress tracking
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