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Slide 1

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By Rahmat
Photosynthesis can be defined
as the process by which plants
make food using carbon dioxide,
water and light energy.…read more

Slide 2

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The equation for photosynthesis
Word Equation Symbol Equation
carbon dioxide + water (+ light
energy) glucose + oxygen…read more

Slide 3

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The cells of the upper leaf surface do
not contain chloroplast and are
Palisade cells beneath the upper
Leaf Structure epidermis are column shaped, tightly
packed and filled with chloroplasts
hence, many chloroplasts are exposed
to bright light, maximising the rate of
Spongy mesophyll cells contain fewer
chloroplasts and are more loosely
packed, this means there are more air
This space allows carbon dioxide and
water vapour to circulate freely within
the leaf.
The guard cells around the stomata
control the opening and closing, which
affects the amount of oxygen and
carbon dioxide going in and out.…read more

Slide 4

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Light provides the energy
needed for
As the light level is raised,
the rate of
photosynthesis also
increases-nut only to a
certain point.
Without enough light, a
plant cannot
Limiting factors-
photosynthesise very Light
quickly, even if there is
plenty of water and
carbon dioxide.…read more

Slide 5

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Carbon dioxide is one of
the raw materials
needed in
The rate of
increases as the rate of
carbon dioxide
Even if there is plenty of
Limiting factors-
light, a plant cannot Carbon Dioxide
photosynthesise if there
is insufficient carbon
dioxide.…read more

Slide 6

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The higher the temperature,
the faster the chemical
reactions of photosynthesis,
(within limits)
However, photosynthesis is
controlled by enzymes.
Most enzymes are
destroyed (denatured) once
the temperature rises to
around 40-50°C Limiting factors-
Therefore if the Temperature
temperature becomes to
high, the rate of
photosynthesis falls.…read more

Slide 7

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