Chapter 8 - Photosynthesis Autotrophic organisms – organisms that make their own organic compounds...
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Transcript of Chapter 8 - Photosynthesis Autotrophic organisms – organisms that make their own organic compounds...
![Page 1: Chapter 8 - Photosynthesis Autotrophic organisms – organisms that make their own organic compounds (food.) Heterotrophic organisms – organisms That CANNOT.](https://reader036.fdocuments.in/reader036/viewer/2022062314/56649e5f5503460f94b5939d/html5/thumbnails/1.jpg)
Chapter 8 - Photosynthesis
Autotrophic organisms – organisms that make their own organic compounds(food.)
Heterotrophic organisms – organismsThat CANNOT make their own food
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Figure 10.2 Focusing in on the location of photosynthesis in a plant
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Figure 10.6 Why leaves are green: interaction of light with chloroplasts
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Overall reaction for photosynthesis:
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Requirements for photosynthesis tooccur:
CO2 – this is obtained through openings called stomata located under the leaves. Draw here:
H2O – The roots pull it from the soil up to the leaves.
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Sunlight – provides energy for the reaction.
Pigments:Chlorophyll – absorbs red and blue light (which provides energy)Carotenes and Xanthophylls – absorb different wavelengths of light.
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Energy-storing compounds
The energy from the sun has to be temporarily stored in a molecule before it can be used to make sugar.
Solar energy elevates electrons to a higher energy level by trapping them in chemical bonds.
2 energy-storing molecules are used:
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ATP
NADP+
How they’re made
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- When an organism makes energy,It is in the form of a molecule called
ATP
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Draw chloroplast diagram here:
http://www.daviddarling.info/images/chloroplast.jpg
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AP Biology Kovacs
Figure 10.12 How noncyclic electron flow during the light reactions generates ATP and NADPH (Layer 1)
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AP Biology Kovacs
Figure 10.12 How noncyclic electron flow during the light reactions generates ATP and NADPH (Layer 2)
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AP Biology Kovacs
Figure 10.12 How noncyclic electron flow during the light reactions generates ATP and NADPH (Layer 3)
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AP Biology Kovacs
Figure 10.12 How noncyclic electron flow during the light reactions generates ATP and NADPH (Layer 5)
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AP Biology Kovacs
Figure 10.14 Cyclic electron flow
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AP Biology Kovacs
Figure 10.16 The light reactions and chemiosmosis: the organization of the thylakoid membrane
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Photosynthesis is a series of chemicalreactions in the chloroplast
1 – Light dependent reaction (photochemical reaction)
-Occurs in the photosynthetic membranes of the chloroplast (grana)
-Water is split using light energy in a process called photolysis.
-Energy is transferred to ATP and NADPH for use in the next reaction.
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-Oxygen gas is produces as a waste product.
Summary:
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2 – Light-Independent Reaction(a.k.a. Dark Reactions, Calvin Cycle, Carbon Fixation) YIKES!!!
- Occurs in the stroma of the chloroplast
- Carbon dioxide is used to create a carbohydrate (glucose)-Energy is provided by ATP and NADPH from the light reaction:
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Summary:
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Box Diagram!