Download Module 5 Photosynthesis and Cellular Respiration

Biology 3rd Edition
Module 5
Photosynthesis:
6 CO2 + 6 H2O + sunlight
(reactants)
C6H12O6 + 6 O2
(products)
In this reaction carbon dioxide, water, and light energy (sunlight) are used to make food (glucose) to be
stored for use by cells to use to perform cellular respiration.
Two Phases

Light Reactions
takes place in the thylakoid membrane
converts light energy to chemical energy
inputs = water and sunlight
outputs = ATP and NADPH – to be used
in the Calvin cycle
splits water molecule for hydrogen ions

oxygen is a waste product

light dependent







Calvin Cycle
takes place in the stroma
converts CO2 to C6H12O6
inputs = CO2, ATP, NADPH

outputs = C6H12O6 (glucose)


light independent
called a cycle because the required
components are continuously regenerated
Electron Carriers = NADPH
Cellular Respiration:
C6H12O6 + 6 O2
6 CO2 + 6 H2O + energy (ATP)
In this reaction energy from the breakdown of food (glucose) is stored in ATP.
Four Phases of Cellular Respiration
Phase/Location
Input
Glycolysis (cytoplasm)
Glucose + 2 ATP
Link reaction
(mitochondrial matrix)
2 pyruvic acid
Krebs cycle
(mitochondrial matrix)
2 Acetyl CoA
ETC (folded inner
membrane of the
mitochondria)
10 NADH
2 FADH2
6 O2 (final electron
accepter)
Final potential ATP produced
Electron Carriers = NADH and FADH2
Output
2 pyruvic acid
4 ATP
2 NADH
2 CO2 (waste)
2 NADH
2 Acetyl CoA
4 CO2 (waste)
2 ATP
6 NADH
2 FADH2
34 ATP
6 H2O
Net ATP
2 ATP
2 ATP
34 ATP
38 ATP
Biology 3rd Edition
Module 5