What is this?. Objectives Draw and label the structure of a chloroplast as seen in electron micrographs. Explain the relationship between the structure.

What is this?

Chloroplasts and light dependent reactions

Objectives

Draw and label the structure of a chloroplast as seen in

electron micrographs.

Explain the relationship between the structure of the chloroplast and its function.

Explain the light dependent reactions.

Explain photophosphorylation in terms of chemiosmosis.

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

What is oxidation and reduction?

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.Key terms: oxidation, reduction, photosystem, proton, electron,

photolysis

What is oxidation and reduction?

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.Key terms: oxidation, reduction, photosystem, proton, electron,

photolysis

Sites1.Light dependent reactions occur in the grana, which are stacks of thylakoid membranes. The large surface area of these membranes maximises light absorption

2. Light independent reactions occur in the fluid stroma. This contains the enzymes of the Calvin cycle

Photosynthesis occurs in chloroplasts and involves two distinct stages:

What is oxidation and reduction?

Label the key features.

Explain the key features.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Thylakoid space space

The small space within the grana of the thylakoid membranes ensures accumulation of protons during chemiosmosis

An overview

Light dependent stage

Light independent stage

What is oxidation and reduction?

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.Key terms: oxidation, reduction, photosystem, proton, electron,

photolysis

What is oxidation and reduction?

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.Key terms: oxidation, reduction, photosystem, proton, electron,

photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Cyclic photophosphorylation

Chlorophyll

e-

e-

electron acceptor

light

ATP

ADP + Pi

Non-cyclic photophosphorylation

Photosystem II

Photosystem I

electron acceptor

electron acceptor

e-

e-

e-

ATP

ADP + Pi

light light

H2Oe-

2H+

2H

½O2

NADP

e-

2H+

2H

NADP+

NADPH + H+

To the light independent

reaction

Photolysis of water4 H2O → 4 H+ + 4 OH-

4 OH- - 4 e- → O2 + 2 H2O

Photosystem II

NADP+

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis

Chloroplasts and light dependent reactions

Outcomes7: Explain the main stages in the light dependent reactions, making reference to how ATP is generated.

5: Describe the role of photolysis in the light dependent reactions.

3: Describe how oxidation and reduction reactions are involved in photosynthesis.

Key terms: oxidation, reduction, photosystem, proton, electron, photolysis