Cell Energy Photosynthesis
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Transcript of Cell Energy Photosynthesis
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Cell EnergyPhotosynthesis
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What do you know about photosynthesis?
Answer the true/false questions using your prior knowledge about photosynthesis.
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____ 1. Photosynthesisis important because it uses excess oxygen in the atmosphere.
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____ 2. Photosynthesis creates energy.
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____ 3. Photosynthesis stores energy in the bonds of glucose.
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____ 4. Water is a necessary ingredient for photosynthesis.
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____ 5. Carbon dioxide is produced by photosynthesis.
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____ 6. The gasoline used to drive to school today is ultimately the result of photosynthesis.
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____ 7. Chlorophyll, contained in the mitochondria, traps light energy for photosynthesis.
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Photosynthetic organisms are producers.
Producers (autotroph) make their own source of chemical energy.
Plants use photosynthesis and are producers.
Photosynthesis captures energy from sunlight to make sugars.
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Photosynthesis…the process through which plants
convert light energy to chemical energy in order to produce food
The energy involved in photosynthesis is stored in the chemical bonds of carbohydrates.
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Photosynthesis Equation
H2O + CO2 C6H1206 + O2(water) + (carbon dioxide) (glucose) + (oxygen)
A balanced equation…
6H2O + 6CO2C6H12O6 + 6O2
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ChloroplastLocated inside leaf cellsCapsule-shaped organelleContained by two membranes
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Photosynthesis in plants occurs in chloroplasts.
Photosynthesis takes place in two parts of chloroplasts.– grana
(thylakoids)– stroma
chloroplast
stroma
grana (thylakoids)
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Chloroplast PartsThylakoids: disk-shaped vesicles
stacked inside the chloroplastGranum: a stack of thylakoidsStroma: liquid material inside the
chloroplastChlorophyll: pigment located inside the
thylakoid; gives plants their green color
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Photosynthesis
2 parts of photosynthesis – light dependent and light independent
Light dependent uses sunlight to make ATP
Light independent uses that ATP to make Glucose (CALVIN CYCLE)
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The light-dependent reactions capture energy from sunlight.
– take place in thylakoids– water and sunlight are needed– chlorophyll absorbs energy– energy is transferred along
thylakoid membrane then to light-independent reactions
– oxygen is released
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Light Dependent
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The light-independent reactions make sugars.
– take place in stroma– needs carbon dioxide
from atmosphere– use energy to build a
sugar in a cycle of chemical reactions
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Light Independent
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The equation for the overall process is:6CO2 + 6H2O C6H12O6 + 6O2
C6H12O6
granum (stack of thylakoids)
thylakoid
sunlight
1 six-carbon sugar
6H2O
6CO2
6O2
chloroplast1
2
43
energy
stroma (fluid outside the thylakoids)
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Photosynthesis (the basics)
http://www.youtube.com/watch?v=-5F2NcYqWr4
http://www.youtube.com/watch?v=mpPwmvtDjWw
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Light Dependent
http://www.youtube.com/watch?v=HrMka8vj73U
http://www.youtube.com/watch?v=eY1ReqiYwYs
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Calvin Cycle
http://www.youtube.com/watch?v=E_XQR800AgM