Photosynthesis Overview With some tips at the end for your “Sunlight to ATP” poster…

Photosynthesis Light + CO 2 + H 2 O C 6 H 12 O 6 + O 2 Respiration C 6 H 12 O 6 + O 2 CO 2 + H 2 O + ATP Inputs Outputs

Sunlight provides the energy that eventually becomes ATP in you!

Reactions in Photosynthesis (Chloroplast) Inputs Light Dependent Reactions in the Thylakoid  Light H2OH2O  NADP+  ADP Calvin Cycle in the Stroma  ATP  CO 2  NADPH Outputs Light Dependent Reactions in the Thylakoid O2O2  NADPH  ATP Calvin Cycle in the Stroma  ADP  NADP+  Glucose (C 6 H 12 O 6 )

Light Reaction … light energy shakes chlorophyll … releases electrons

In the Thylakoid

In the Stroma The ATP and NADPH was made during the light reactions (thylakoid) CO 2 enters the cycle at top Glucose / Organic compounds are the output

Review – Big Picture

Sunlight to ATP Big Picture Review

chloroplast H2OH2O O2O2 NADPH StromaThylakoid CO 2 Glucose Glycolysis (cytoplasm) pyruvate CO 2 NADH mitochondria Kreb’s Cycle NADH FADH 2 Electron Transport ATP H2OH2O

Control of Respiration … feedback systems Lots of AMP (low energy molecule) – Stimulates enzyme to produce ATP Lots of ATP or Citrate – Shuts down enzyme to prevent overproduction

Anaerobic Respiration Without Oxygen – No electron transport chain … less ATP 2 types: 1)Alcoholic fermentation: (bacteria, yeast) Pyruvate + NADH Ethanol + NAD + + CO 2 2)Lactic Acid fermentation: (animals like you) Pyruvate + NADH Lactic Acid + NAD + What’s different about these two equations? How can you set up an experiment to detect the difference?

No oxygen = anaerobic pathway Yeast/bacteria – Produce ethanol when deprived of oxygen … still has some energy Humans – Produce lactic acid when deprived of oxygen – Recycled in liver to produce pyruvate