Download - Assignment # Light Dependent Reactions of Photosynthesis Honors Biology November 19, 2015 Miss Moon
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Assignment #Light Dependent
Reactions of Photosynthesis
Honors BiologyApril 21, 2023
Miss Moon
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I. Photosynthesis – capturing and transforming energy from sunlight into chemical energy (glucose)A. Done by green plants and
blue-green algaeB. Autotrophs are able to make their own food with lightC. Sunlight is a form of
radiation or energy
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D. Pigment – substance that absorbs light
E. Chlorophyll – photosynthetic pigment (reflects green
light)F. Chloroplast – organelle where
photosynthesis occurs1. Thylakoid – sacs of
membranes in a chloroplast
2. Grana – stacks of thylakoids
3. Stroma – regions between the grana
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II. General equation for photosynthesis
6 CO2 + 12 H2O C6H12O6 + 6O2
This is the opposite of aerobic respiration!
Carbon
dioxidewater Sun
light
glucose oxygen
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III. The light dependent reactions of photosynthesisA. Take place in the
presence of light (when)B. Takes place in the grana
(where)C. Begin when chloroplasts
absorb light
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D. Photosystem II1. Light is absorbed2. Electrons pass to
the electron transport chain
3. Makes ATP
(like the ETC in aerobic respiration!)
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E. Photosystem I1. Light is absorbed2. NADP forms
NADPH2 (it is a hydrogen acceptor)
3. Takes electrons from H2O and forms O2 which is released (this is splitting water!)
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IV. Summary of Light ReactionsA. Break apart waterB. Forms ATP and NADPH2
C. Releases O2
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Journal Entry #April 21, 2023
Explain how oxygen and carbon dioxide leave and enter the plant.
Explain how water enters and leaves a plant.
(use your notes on transport in plants)