8.2 & 3 the process of photosynthesis. key questions what happens during the light dependent...
TRANSCRIPT
Key QuestionsWhat happens during the Light
Dependent Reactions?
What happens during the Light Independent Reactions?
What factors affect photosynthesis?
What are electron carrier molecules?
What are the reactants and products in photosynthesis?
Photosynthesis is a biochemical pathway
Two parts
1. Light dependent reaction
2. Light independent reaction (Calvin Cycle)
3 Stages of Photosynthesis
Stage 1: Energy is captured from sunlight
Stage 2: Light energy is converted to chemical energy (ATP + NADPH)
Stage 3: Energy is used to form glucose
Light Dependent ReactionPhotosystem II
p. 237
Thylakoids
Chlorophyll--blue and red absorbed
-green and yellow reflected
Carotenoids
-red and orange reflected
Light splits water molecule into:4H+ + 4e- + O2
Light Dependent ReactionPhotosystem I
Light Absorbed Again
NADP+ takes a H+ ion and 2 e- becomes NADPH
Minimal amount of ATP made (to be used later)
Diffuse H+ into stroma
Light Independent ReactionCalvin Cycle
p. 238
Stroma
No light required
ATP, NADPH come in from light reactions
CO2 comes in from the atmosphere
ADP, NADP+ and C6H12O6 (Glucose) made