CAIE A-Level Biology A2 13.1.9 Non Cyclic Photophosphorylation Questions
Explain non-cyclic photophosphorylation using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- A2
Explain non-cyclic photophosphorylation using evidence from each question and mark scheme.
Non-cyclic photophosphorylation occurs in the light-dependent stage of photosynthesis.
Outline the main features of non-cyclic photophosphorylation.
any four from:
1 both photosystem I and photosystem II involved ;
A both photosystems
2 photoactivation of chlorophyll occurs ;
3 photolysis of water occurs / description ;
4 oxygen production / oxygen-evolving complex involved ;
5 electrons emitted by photosystem I used to reduce NADP
or
NADP is the final electron acceptor ;
6 photosystem I receives electrons from photosystem II
or
photosystem II receives electrons from photolysis (of water) ;
7 ETC / electron transport chain, sets up proton gradient
or
chemiosmosis / ATP produced ;