Photosynthesis: A Comprehensive Overview
Photosynthesis
Photosynthesis
Photosynthesis is the
process which produces
"food" in plants. The
product is a sugar,
known as "glucose" and
is used by plants in
various ways, such as to
produce cell walls and
protein.
Photosynthesis
Any glucose that the
plant does not use is
converted into either
lipids or starch, and is
stored for later use.
Photosynthesis
Plants use a substance called chlorophyll, which is
green and found in structures in a plant leaf called
chloroplasts. There are four raw materials to
consider:
Chlorophyll
Carbon dioxide
Water
Sunlight
Photosynthesis
You will need to MEMORISE the WORD version at
the top because in your Biology studies it will come
up many times and is a favourite for tests and
exams.
You don’t necessarily need to memorise the
symbolic version but it’s a bonus if you can recite it
if asked.
Photosynthesis
Q. What are the two REACTANTS involved in photosynthesis ?
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W
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Q. Name the energy source involved in photosynthesis
S
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Q. Name the green compound involved in photosynthesis
C
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Photosynthesis
This CROSS SECTION of
a leaf shows the
structures involved in
keeping the leaf
healthy and which get
involved in this process.
We will take a brief
look at each part
starting on the next
slide.
Photosynthesis
EPIDERMIS - The “skin” of the leaf. The
epidermis serves several functions: it protects
against water loss, regulate gas exchange,
secretes metabolic compounds, and (especially
in roots) absorbs water and mineral nutrients.
The epidermis is covered in a waxy substance
(waxy cuticle) to help prevent excess moisture
loss.
Photosynthesis
PALISADE MESOPHYLL LAYER - Palisade cells
contain the largest number of chloroplasts per
cell, which makes them the primary site of
photosynthesis in the leaves of those plants that
contain them, converting the energy in light to
the chemical energy of carbohydrates. Beneath
the palisade mesophyll are the spongy
mesophyll cells, which also perform
photosynthesis.
Photosynthesis
STOMATA
AIR SPACES
Both are adaptations
of the structure of the
leaf to allow gases to
move freely around,
in and out, of the leaf.
GUARD CELLS control
the opening and
closing of the stomata
so that excessive
moisture and gas loss
is avoided.
Photosynthesis
Q. Would you expect to find chloroplasts in the roots of a plant?
Exercises - Photosynthesis
Exercises - Photosynthesis
Photosynthesis is the fundamental process through which plants produce food in the form of glucose. This intricate process involves the conversion of carbon dioxide and water into glucose using sunlight as the energy source. The key player in photosynthesis is chlorophyll, a green compound found in chloroplasts. This summary provides insights into the reactants, energy sources, and compounds involved in photosynthesis, along with a description of the leaf structures essential for this process.
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Presentation Transcript
Photosynthesis Photosynthesis is the process which produces "food" in plants. The product is a sugar, known as "glucose" and is used by plants in various ways, such as to produce cell walls and protein.
Photosynthesis Any glucose that the plant does not use is converted into either lipids or starch, and is stored for later use.
Photosynthesis Plants use a substance called chlorophyll, which is green and found in structures in a plant leaf called chloroplasts. There are four raw materials to consider: Chlorophyll Carbon dioxide Water Sunlight
Photosynthesis You will need to MEMORISE the WORD version at the top because in your Biology studies it will come up many times and is a favourite for tests and exams. You don t necessarily need to memorise the symbolic version but it s a bonus if you can recite it if asked.
Photosynthesis Q. What are the two REACTANTS involved in photosynthesis ? Carbon Dioxide Water Q. Name the energy source involved in photosynthesis Sunlight Q. Name the green compound involved in photosynthesis Chlorophyll
Photosynthesis This CROSS SECTION of a leaf shows the structures involved in keeping the leaf healthy and which get involved in this process. We will take a brief look at each part starting on the next slide.
Photosynthesis EPIDERMIS - The skin of the leaf. The epidermis serves several functions: it protects against water loss, regulate gas exchange, secretes metabolic compounds, and (especially in roots) absorbs water and mineral nutrients. The epidermis is covered in a waxy substance (waxy cuticle) to help prevent excess moisture loss.
Photosynthesis PALISADE MESOPHYLL LAYER - Palisade cells contain the largest number of chloroplasts per cell, which makes them the primary site of photosynthesis in the leaves of those plants that contain them, converting the energy in light to the chemical energy of carbohydrates. Beneath the palisade mesophyll are the spongy mesophyll cells, which also perform photosynthesis.
Photosynthesis STOMATA AIR SPACES Both are adaptations of the structure of the leaf to allow gases to move freely around, in and out, of the leaf. GUARD CELLS control the opening and closing of the stomata so that excessive moisture and gas loss is avoided.
Photosynthesis Q. Would you expect to find chloroplasts in the roots of a plant?
