参考答案:
(Notes: Six of these points is required for six marks)
Chlorophyll is attached to the thylakoid membrane.
The thylakoid membrane links chlorophyll, the electron transport chain and ATP synthase.
Electrons in the chlorophyll molecule are excited by light energy.
The excited electrons are accepted by the electron acceptors positioned in the membrane.
Light energy is used in the photolysis of water to form protons (and electrons)
Photolysis of water occurs in Photosystem II.
Protons formed from photolysis are pumped into the intermembrane space.
The membrane allows an accumulation of protons in the intermembrane space. (Accept; the
creation of a proton gradient, or an electrical potential gradient.)
The proton concentration gradient drives ATP production/ATP is produced by chemiosmosis.
The membrane is impermeable to hydrogen ions (The membranes is only permeable to hydrogen ions at ATP synthase ‘pores’.)
ATP is produced as the hydrogen ions move through the ATP synthase embedded in the membrane.
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