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Biology
Topic 6 Plant Structures and their Functions
Photosynthesis
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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 light?
Little
packets
of energy
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What are the reactants of 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?
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
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What is the primary product that plants want from photosynthesis?
Glucose
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What do plants sometimes use oxygen for?
For
respiration
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What is one way glucose is used in plants?
For
cellular respiration
to release energy
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How can glucose be thought of in terms of energy?
As a
battery
storing energy
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What can glucose molecules combine to form?
Cellulose
and
starch
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What is cellulose used for in plants?
To strengthen
cell walls
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Why is starch used for long-term storage?
It is more
compact
and
insoluble
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When do plants typically break down starch to glucose?
When
photosynthesis
isn't happening much
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How do plants make amino acids?
By combining
glucose
with
nitrate ions
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What can amino acids be combined to make?
Proteins
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What is one use of glucose in plants besides energy?
Making
oils
and fats
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Why is glucose essential for plants?
It affects their
growth rate
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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 does Cognito.org provide for students?
Videos on various topics
Questions and flashcards
Exam style questions
Past papers
Progress tracking
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