Module 5.2.1 - Photosynthesis

Question 1

What Photosystems does non-cyclic photophosphorylation include?

Answer 1

PSI & PSII

Question 2

Outline stage 1 of Non-cyclic Photophosphorylation

Answer 2

• Light energy absorbed by PSII (P680)
• Electrons become excited in chlorophyll
• Electron move to a higher energy level along the ETC
• Excited electron passes from PSII - PSI

Question 3

Outline stage 2 in N-C.Photophosphorylation

Answer 3

• Need to replace the electron in PSII
• Photolysis of water molecule
• Produce 2 H+ (Pass to NAPD)
• Oxygen molecule diffuse out of plant
• 2 electrons fill gaps in P680