Photosynthesis

Page
11

In addition to food production, photosynthesis produces the O2 in our atmosphere

Slide 83

Fig. 10-21

Light

Reactions:

Photosystem II

Electron transport chain

Photosystem I

Electron transport chain

CO2

NADP+

ADP

P

i

+

RuBP

3-Phosphoglycerate

Calvin

Cycle

G3P

ATP

NADPH

Starch

(storage)

Sucrose (export)

Chloroplast

Light

H2O

O2

Slide 84

Fig. 10-UN1

CO2

NADP+

reductase

Photosystem II

H2O

O2

ATP

Pc

Cytochrome

complex

Primary

acceptor

Primary

acceptor

Photosystem I

NADP+

+ H+

Fd

NADPH

Electron transport

chain

Electron transport

chain

O2

H2O

Pq

Slide 85

Fig. 10-UN2

Regeneration of

CO2 acceptor

1 G3P (3C)

Reduction

Carbon fixation

3 CO2

Calvin

Cycle

6  3C

5  3C

3  5C

Slide 86

Fig. 10-UN3

pH 7

pH 4

pH 4

pH 8

ATP

Slide 87

Fig. 10-UN4

Slide 88

Fig. 10-UN5

Slide 89

You should now be able to:

Describe the structure of a chloroplast

Describe the relationship between an action spectrum and an absorption spectrum

Trace the movement of electrons in linear electron flow

Trace the movement of electrons in cyclic electron flow

Slide 90

Describe the similarities and differences between oxidative phosphorylation in mitochondria and photophosphorylation in chloroplasts

Describe the role of ATP and NADPH in the Calvin cycle

Describe the major consequences of photorespiration

Describe two important photosynthetic adaptations that minimize photorespiration