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Understanding Photosynthesis: Light-Dependent & Carbon-Fixation Stages, Study notes of Enzymes and Metabolism
An in-depth exploration of the two main stages of photosynthesis: the light-dependent stage (photolysis) and the carbon-fixation stage (Calvin cycle). Learn about the role of pigments, the production of ATP and NADPH, and the process of carbon fixation to create glucose.
Typology: Study notes
2021/2022
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Starter: What can you
remember from N5?
Fill out the diagram
ADP + Pi
Chemical
energy
Used in Stage 2 Released to the air Used in stage 2 Stage 1: Name: Location:
PHOTOSYNTHESIS AND ENERGY TRANSFER
We are learning to
- Describe what occurs during the photolysis
stage in photosynthesis.
I can
- Draw a diagram of photolysis and explain
what happens in each stage.
- Complete a scientific design application
question.
Photosynthesis (Higher)
CO
glucose (C
H
O
Series of enzyme controlled reactions
involving reduction of CO
2
to form
glucose (carbohydrate)
Reduction= gain in Hydrogen
Needs ATP for this to occur.
Photosynthesis
2 stages:
1. Light Dependent Stage/Photolysis
Making H & ATP for stage 2 GRANUM of chloroplast
2. Carbon Fixation/Calvin Cycle
Temperature dependent stage (requires enzymes) Stroma of chloroplast
Chloroplasts
Granum Light dependent stage Stacks of membranes arranged as channels Contains pigments Stroma Carbon fixation site Lacks chlorophyll but contains enzymes & starch grains (insoluble source of carbohydrate).
Stage 1 Light dependent
stage
Photolysis
H
2
O O
2
+ H
2 Produce
1. O
2
by-product
2. NADPH
2