Learning
Challenges
This topic
2. More
ATP
1. Intro to
A2 and
ATP
ATP and
Photosynthesis
6.
Summary
6. Limiting
factors I &
II
Label the
features of a
chloroplast
3. Chloroplasts
again
4. Light
dependent
reaction
5. Light
independent
reaction
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
What does this equation mean?
light
6CO2 + 12H2O → C6H12O6 + 6O2 + 6H2O
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts –treasure hunt
What is
the
function
of each
bit?
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
Chloroplasts are flat disc shaped organelles which are usually 2-10 μm in diameter with a
thickness of about 1 μm. In terrestrial plants, their diameter is usually 5 μm and thickness is
around 2.3 μm.
Membrane
The chloroplast is covered by a thick lipid bi-layer membrane, which controls the transport of
materials into and out of this cell organelle.
Stroma
Inside the membrane is an aqueous fluid that permeates all the chloroplast interior. It contains
enzymes, ribosomes and circular strands of DNA . It is the site for the Calvin cycle, which is
the process of carbon fixation in plants.
Thylakoids
These are the structures inside the stroma, that are actual sites of photosynthesis. They are
flat disc shapes stacked vertically over each other. E
Granum
A stack of thylakoids. These are spread throughout the chroloplast's stroma. Every thylakoid
has a membrane covering it and the photosynthesis process takes place on its surface.
Antenna Complexes
The thylakoid membrane contains light gathering structures called antenna complexes, which
are made up of light absorbing pigments like chlorophyll and carotenoids, along with proteins
that gel them together.
Lamellae
These connect the various thylakoid stacks and create the skeleton that sustains the whole
chloroplast structure.
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
• What colour is chlorophyll?
• Chloroplasts contain photosynthetic
pigments to absorb the light energy
• Pigments are chlorophyll a, chlorophyll b
and carotene
• The pigments are found in the thylakoid
membranes attached to proteins.
• The protein and pigment are called a
photosystem
• Two photosystems used by plants to
absorb light are PSI ( 700nm
wavelength) and PSII ( 680nm
wavelength)
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
• Why are plants green?
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
• Autumn colours practical
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
• So what do you know?
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll
Chloroplasts
Learning
Challenges
Label the
features of a
chloroplast
describe the
function of the
features of a
chloroplast
Explain that
light energy
excites
electrons in
chlorophyll
Investigate
the different
types of
chlorophyll