Main questions:
1. The light reactions of photosynthesis supply the Calvin cycle with?
ATP and NADPH.
2. How is photosynthesis similar in C4 plants and CAM plants?
In both cases, rubisco is not used to fix carbon initially.
3. In mechanism, photophosphorylation is most similar to?
The Calvin cycle.
Main Facts:
1.Chloroplasts split water into hydrogen and oxygen, incorporating the electrons of hydrogen into sugar molecules.
2. The light reactions in the thylakoid membranes split water, releasing O2, producing ATP, and forming NADPH.
3. The Calvin cycle in the stroma forms sugar from CO2, using ATP for energy and NADPH for reducing power.
4. Light is a form of electromagnetic energy. The colors we see as visible light include those wavelengths that drive photosynthesis.
5. A pigment absorbs visible light of specific wavelengths.
Summary:
Key terms:
1. Chlorophyll: the green pigment located within chloroplasts.
2. Mesophyll: The tissue in the interior of the leaf.
3. Thylakoids: An elaborate system of interconnected membranous sacs.
4. Spectrophotometer: The ability of a pigment to absorb various wavelengths of light can be measured with an instrument.
5. Absorption spectrum: a pigment’s light absorption versus wavelength.
6. Carotenoids: hydrocarbons that are various shades of yellow and orange because they absorb violet and blue-green light.
7. Linear electron flow: it occurs during the light reactions of photosynthesis.
8. Glyceraldehyde-3-phosphate: a three-carbon sugar.
9. C3 plants: the first organic product of carbon fixation is a three-carbon compound.
10. cyclic electron flow-A route of electron flow during the light reactions of photosynthesis that involves only photosystem I and that produces ATP but not NADPH or O2.
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