Photosynthesis Flashcards
1
Q
Describe the LIR?
A
- the CO2 combines with RuBP using the enzyme Rubisco
- This forms two molecules of GP
- ATP and NADPH from the LDR are used to reduce the GP to TP
- NADP is reformed and goes back to the LDR
- Some TP are converted to useful organic substances, such as glucose
- Most of the TP is used to regenerate RuBP
2
Q
Where does the Calvin cycle take place?
A
Stroma
3
Q
Where does the LDR take place?
A
Thylakoid membranes
4
Q
What factors effect the rate of photosynthesis?
A
- Light intensity
- CO2 concentration
- Temperature
- pH
5
Q
Describe the process of the LDR?
A
- Light is absorbed by the cholorphyll
- This excites electrons
- The electrons leave the chlorophyll via the ETC
- Electrons are passed down a number of electron carriers through a series of oxidation-reduction reactions
- That provides energy for ADP to combine with Pi to form ATP
- Photolysis of water provides electrons and H+ ions which reduce NADP and gives off O2
