2

Created by

Georgia Forbes

Cards (18)

What are the light dependent reactions in photosynthesis responsible for?
Producing ATP and reduced NADP
Where do the light dependent reactions take place?
On the thylakoid membranes
What is produced alongside ATP in the light dependent reactions?
Reduced NADP and oxygen
What are the two types of photo phosphorylation discussed?
Non-cyclic and cyclic photo phosphorylation
What is the role of photosystems in the light dependent reactions?
Harvest light energy
What happens to electrons in photosystem 2 when light energy is absorbed?
A pair of electrons is excited
What is the function of the electron transport chain in the light dependent reactions?
Transfers electrons and produces ATP
How is ATP produced during the light dependent reactions?
Through chemiosmosis
What is photolysis?
Splitting of water molecules
What is the source of oxygen produced in photosynthesis?
From the photolysis of water
What distinguishes non-cyclic from cyclic photo phosphorylation?
Electrons do not return to photosystem 2
When does cyclic photo phosphorylation occur?
When chloroplasts need more ATP
What is the role of the proton gradient in ATP production?
It drives ATP synthesis via ATP synthase
What is chemiosmosis?
Movement of protons to generate ATP
What is the enzyme responsible for ATP synthesis in the thylakoid membrane?
ATP synthase
What are the key processes involved in the light dependent reactions?
Light absorption by photosystems
Excitation of electrons
Electron transport chain
ATP production via chemiosmosis
Photolysis of water
Formation of reduced NADP
What are the differences between non-cyclic and cyclic photo phosphorylation?
Non-cyclic:
Electrons do not return to PS2
Produces ATP and reduced NADP

Cyclic:
Electrons return to PS1
Produces only ATP
How does the proton gradient enhance ATP production?
Protons are pumped into thylakoid interior
Creates a higher concentration of protons
Protons diffuse back through ATP synthase
Drives ATP synthesis from ADP and Pi