LIR in Photosynthesis Flashcards
What is the main point of LIR?
To make Glucose
What are the ultimate reactants in LIR, and where do they come from?
ATP and NADPH; they come from LDR
What are the ultimate products of LIR, and where do they go?
ADP+P and NADP+; they go to the LDR
Glucose → Gets used for food
What is the 1st step of LIR?
6CO2 joining with 6 RuBP
What is RuBP and where does it come from?
RuBP is a carbon molecule- it already exists in the Stroma
How many carbons does RuBP have?
5 carbons → (CCC CC)
What is the result of step 1?
6 (CCC CCC)
What is the 2nd step of LIR?
Converting 6 (CCC CCC) into 12 (CCC)
Why do we convert 6 (CCC CCC) into 12 (CCC) in the 2nd step?
Because 6 (CCC CCC) is unstable and 12 (CCC) is stable
What is the 3rd step of LIR?
To convert PGA into PGAL
What is PGA? What is PGAL?
PGA is the 12 (CCC), PGAL is the energized 12 (CCC)
Where does the energy come from in step 3?
12 ATP and 12 NADPH break bonds
What are the ultimate results of step 3?
PGA –> PGAL, 12ATP –> 12 ADP, 12 NADPH –> 12 NADP+
What is the 4th step of LIR?
Breaking PGAL into 10 (CCC) and 2 (CCC)
Why does the PGAL break into 10 (CCC) + 2 (CCC)?
Because the PGAL itself is too big to continue in the process; also because the 2 (CCC) needs to make __________ in the _____________
What does the 2 (CCC) make in step 4?
It goes to the cytoplasm to make glucose
What is the 5th step of LIR?
The 10 (CCC) converts into 6 (CCC CC) which was what we started with
How does the 10 (CCC) convert into 6 (CCC CC)
6 ATP breaks apart, releasing energy and turns into 6 ADP
What are the 3 Phases that occur in this entire process?
Carbon Fixation, Reduction, and Regeneration
When do the 3 Phases occur in this entire process?
Carbon Fixation happens when RuBP combines with CO2
Reduction happens when PGA turns into PGAL
Regeneration happens when 10 (CCC) turns into 6 (CCC CC)
