Chapter 11 Flashcards
What is the equation for photosynthesis?
6CO2 + H20 -> C6H12O6
Where does LDR take place?
Thylakoids
Describe the process of LDR?
The making of ATP
- Chlorophyll absorbs light which excites e- which leaves the chlorophyll in P.S (II) (PHOTOIONISATION)
-The e- is taken up by an electron carrier and passed along the ETC in a series of Redox reactions - ## e- releases energy to make ATP (ADP + Pi -> ATP)
Describe the process of LDR?
The chemiosmotic theory - ATP
- Protons (H+) are pumped from stroma using proton pumps in thylakoid
- when e- released from photolysis it releases energy to produce H+ and maintains high conc in thylakoid and low conc in stroma
- Protons cross through stroma through ATP synthase which causes structure to enzyme this catalyzes formation of ATP
- Rest of membrane is impermeable. Channels form stalked granules
What is the photolysis of water?
Splitting of water which releases energy
Why is the photolysis of water needed?
- Loss of e- during photosynthesis [EDIT] leaves a short of electrons that should be replaced
- Photolysis provides e- from H2O molecule
What is the equation of photolysis?
2H20 -> 4H+ + 4e- + O2
What are the products of photolysis?
Protons
Electrons
Oxygen
Explain how Reduced NADP is made during LDR?
Why is reduced NADP important?
- Main product of LDR and is taken to LIR with an e-
- NADPH is important for a future source of chemical energy to plant
What is the waste product of LDR?
Oxygen which diffuses out of plant
What are the structural adaptations of Thylakoids?
- Staked together in groups called grana
- Large SA
- Network of proteins in grana
- Grnal membranes have ATP Synthase
- Contains DNA + Ribosomes
What are the products od LDR?
ATP, NADPH
used in LIR to reduce G3P
What is the light-independent reaction and when does it occur?
Occurs whether or not light is available
does not require light directly
Where does the light-independent reaction take place?
Stroma
