Chapter 11: Photosynthesis Flashcards
(11 cards)
1
Q
What are two stages of photosynthesis?
A
Light and Dark stage
2
Q
Where does stage 1 occur?
A
In the grana of the chloroplast
3
Q
Is stage 1 controlled by enzymes?
A
No
4
Q
What are the two pathways in stage 1?
A
Cyclic and Non Cyclic pathway
5
Q
Describe the main steps of pathway 1
A
- Chlorophyll absorbs light energy
- Electrons become energised
- Electrons are passed to an acceptor molecule
- Electrons are passed along an electron transport chain
- Electrons release energy to make ATP
- Low energy electrons return to the chlorophyll
6
Q
What is pathway 2 of the light stage called?
A
Non-Cyclic pathway
7
Q
What molecule is formed in pathway 2?
A
Oxygen
8
Q
What is the chem reaction that produces this molecule?
A
Photolysis
9
Q
What is photolysis?
A
The splitting of water using light
10
Q
What are the products of photolysis and what are they used for?
A
1.electrons replace those lost in the chlorophyll
2. protons create a proton pool and are used in NADPH
3. Oxygen is release into the atmosphere
11
Q
What are the products at the end of the light stage of photosynthesis?
A
- ATP
2.NADPH - Oxygen
