Photosynthesis

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What are electron transport systems?

Organised series of enzymes and proteins in the chloroplast membranes
How do electron transport systems phosphorylate?
- Electron transport systems are organised series of enzymes and proteins in the chloroplast membranes.
- One component transfers electrons to another in an orderly sequence.
- Some energy is released at each transfer
- Much energy is captured by using it to make ATP from ADP and a phosphate group- process called phosphorylation. (The manufacture of ATP)
What is photophosphorylation ?

The manufacture of ATP using light energy
Where are electron transport systems found?

In chloroplast membranes
What is ADP?
- Adenosine Diphosphate
- (Energy poor molecule)
- ADP + P = ATP
What is ATP?
- Adenosine Triphosphate
- (Energy rich molecule)
- Adenosine-ribose --sugar
- I
- Base
What is photolysis?
- The splitting of water using light.
- H2O to H, O and electrons
What does H2O split into?
- Hydrogen
- Oxygen
- Electrons
What is the aqueous fluid of the chloroplast where dark phase occurs?

Stroma
What is the inside of a thylakoid called?

Lumen
What is a stack of thylakoids called?

Granum
What do plants use to produce ATP?

Light
Explain cyclic photophosphorylation. (5)
- Light is absorbed by chlorophyll and electrons in the chlorophyll molecule are excited.
- They are picked up by a series of carriers in the electron transport system where ATP is made.
- These electrons return to the chlorophyll
- As they flow their energy is given up to ADP (along with phosphate) to form ATP.
- So light energy is changed to chemical energy.

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Photosynthesis

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Updated

2023-05-04T15:40:24Z