Describe the light reactions of photosynthesis and, for ...
Photosynthesis Study Guide
Define the following key terms:
mesophyll photosystem NADP / NADPH photolysis
chloroplast chemiosmosis carbon fixation RuBP
stroma Calvin cycle bundle sheath cell CAM
thylakoids Rubisco photorespiration granum / grana
light reaction dark reaction photophosphorylation PGA
ATP synthase G3P accessory pigment chlorophyll a / b
Questions:
1. Use all of the components in the list below and chemical formulas as needed to construct an illustration of photosynthesis. Add any components that are needed to make the illustration clear. Explain what is occurring at each step. The components are CO2, H2O, C6H12O6, O2, light (solar) energy in, energy out, NADP and NADPH, ATP, electrons, protons, chloroplast, chlorophylls, photosystems I and II, electron transport system, Calvin cycle, chemiosmosis.
2. Explain how the absorption of photons can energize a plant pigment. Illustrate the process using solar energy and electrons in chlorophyll.
Essays:
1. Describe the light reactions of photosynthesis and, for both a C3 and a C4 plant, trace the path of a carbon dioxide molecule from the point at which it enters a plant to its incorporation into a glucose molecule. Include leaf anatomy and biochemical pathways in your discussion of each type of plant.
2. Explain how the molecular reactions of photosynthesis transform light energy into chemical bond energy. Include in your discussion the relationship between chloroplast structure and light and dark reactions.
3. Describe the similarities and differences between the biochemical pathways of aerobic respiration and photosynthesis in eukaryotic cells. Include in your discussion the major reactions, the end products, and energy transfers.
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