PHOTOSYNTHESIS Part 1

pp. 113-115

How do Organisms “Eat”?

Autotrophs: Make their own carbohydrates using inorganic compound Phototrophs: use sunlight for energy Chemotrophs: use chemicals for

Energy

Heterotrophs: get carbohydrates by eating other organisms

Photosynthesis Refreshersunlight

6CO2 + 6H2O 6O2 + C6H12O6

Sunlight

Carbon dioxide + water oxygen + carbohydrates

Inside the Chloroplast Thylakoids –

flattened sacs inside the chloroplast

Granum – one stack of thylakoids (plural: grana)

Stroma – solution surrounding the grana

Photosynthesis – In DetailOccurs in two parts

PART ONE: LIGHT REACTIONSEnergy is made in the form of

ATP and NADPH

PART TWO: CALVIN CYCLEUses ATP and NADPH from

the light reactions to make carbohydrates

What Powers these Processes?ATP

H+ builds up on one side of the thylakoid

H+ moves from HIGH to LOW concentration through ATP Synthase

ADP + Pi ATP

NADPH NADP+ + H+ NADPH

NADPH vs. ATPThink: different sizes of

batteries. They both provide

energy, but for different

things.

What Powers these Processes?

Vocab to keep in mind:

AutotrophsLight ReactionsCalvin CycleATP and NADPH