#3: Light Dependent Reactions: Photolysis and Photophosphorylation

These flashcards cover key concepts of light-dependent reactions, particularly focusing on processes such as photolysis and photophosphorylation, as well as the movement of electrons in photosynthesis.

What are the two main parts of photosynthesis?

Light-dependent reactions and light-independent reactions (Calvin Cycle).

Where do the light-dependent reactions occur in the chloroplast?

In the thylakoid membranes (grana/thylakoids and lamellae).

What is the role of photolysis of water in photosystem II?

To replace electrons lost by chlorophyll during photoionisation.

Define photophosphorylation.

The process of using light energy to convert ADP to ATP.

What is photoionisation in the context of photosynthesis?

The process where light energy excites electrons in chlorophyll enough for them to leave the molecule.

How does chlorophyll change during the light-dependent reactions?

It loses electrons and becomes oxidised.

What do we call the molecules that accept electrons after they leave chlorophyll?

Electron carriers or electron acceptors.

What does the light energy produce during light-dependent reactions?

A small amount of ATP from ADP.

What are the products of photolysis of water?

Protons (H+ ions), electrons, and oxygen.

What is the function of NADP in the light-dependent reactions?

It accepts electrons that have been reduced from chlorophyll.