Photosynthesis

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Slide 1

Photosynthesis

Slide 2

Chloroplast Structure

Slide 3

Photosynthetic Reactions

Light dependent reactions

Light independent reactions (Calvin Cycle)

Slide 4

Light Reactions

Light dependent reactions take place in the thylakoid membrane, with the pigment chlorophyll absorbing sunlight

Slide 5

Light Reactions

1. Energy from sunlight breaks water into H+, oxygen (O2) and electrons (e-).

Slide 6

Light Reactions

2. H+ and e- are used to produce energy carrying molecules NADPH and ATP

Slide 7

Light Independent Reactions

Light independent reactions occur in the

stroma

Slide 8

The Calvin (C3) Cycle

Slide 9

The Calvin (C3) Cycle

CO2 enters the leaf through the stomates

Slide 10

The Calvin (C3) Cycle

ATP and NADPH (from the light reactions) power the creation of three carbon chains

Slide 11

The Calvin (C3) Cycle

ADP and NADP+ return to the light reactions

in the thylakoid to be “recharged”

Slide 12

Formation of Glucose

3-carbon chains from the C3 cycle join to form the six carbon molecule, glucose (or other molecules required by the plant)

C-C-C + C-C-C  C-C-C-C-C-C

Glucose

C6H12O6

Slide 13

Net Equation for Photosynthesis

6 CO2 + 6 H2O      C6H12O6 + 6 O2

light, enzymes