Assignment # Light Dependent Reactions of Photosynthesis Honors Biology November 19, 2015 Miss Moon.
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Transcript of Assignment # Light Dependent Reactions of Photosynthesis Honors Biology November 19, 2015 Miss Moon.
Assignment #Light Dependent
Reactions of Photosynthesis
Honors BiologyApril 21, 2023
Miss Moon
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
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
II. General equation for photosynthesis
6 CO2 + 12 H2O C6H12O6 + 6O2
This is the opposite of aerobic respiration!
Carbon
dioxidewater Sun
light
glucose oxygen
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
D. Photosystem II1. Light is absorbed2. Electrons pass to
the electron transport chain
3. Makes ATP
(like the ETC in aerobic respiration!)
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!)
IV. Summary of Light ReactionsA. Break apart waterB. Forms ATP and NADPH2
C. Releases O2
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)