LIR in Photosynthesis

Question 1

What is the main point of LIR?

Answer 1

To make Glucose

Question 2

What are the ultimate reactants in LIR, and where do they come from?

Answer 2

ATP and NADPH; they come from LDR

Question 3

What are the ultimate products of LIR, and where do they go?

Answer 3

ADP+P and NADP+; they go to the LDR

Glucose → Gets used for food

Question 4

What is the 1st step of LIR?

Answer 4

6CO2 joining with 6 RuBP

Question 5

What is RuBP and where does it come from?

Answer 5

RuBP is a carbon molecule- it already exists in the Stroma

Question 6

How many carbons does RuBP have?

Answer 6

5 carbons → (CCC CC)

Question 7

What is the result of step 1?

Answer 7

6 (CCC CCC)

Question 8

What is the 2nd step of LIR?

Answer 8

Converting 6 (CCC CCC) into 12 (CCC)

Question 9

Why do we convert 6 (CCC CCC) into 12 (CCC) in the 2nd step?

Answer 9

Because 6 (CCC CCC) is unstable and 12 (CCC) is stable

Question 10

What is the 3rd step of LIR?

Answer 10

To convert PGA into PGAL

Question 11

What is PGA? What is PGAL?

Answer 11

PGA is the 12 (CCC), PGAL is the energized 12 (CCC)

Question 12

Where does the energy come from in step 3?

Answer 12

12 ATP and 12 NADPH break bonds

Question 13

What are the ultimate results of step 3?

Answer 13

PGA –> PGAL, 12ATP –> 12 ADP, 12 NADPH –> 12 NADP+

Question 14

What is the 4th step of LIR?

Answer 14

Breaking PGAL into 10 (CCC) and 2 (CCC)

Question 15

Why does the PGAL break into 10 (CCC) + 2 (CCC)?

Answer 15

Because the PGAL itself is too big to continue in the process; also because the 2 (CCC) needs to make __________ in the _____________

Question 16

What does the 2 (CCC) make in step 4?

Answer 16

It goes to the cytoplasm to make glucose

Question 17

What is the 5th step of LIR?

Answer 17

The 10 (CCC) converts into 6 (CCC CC) which was what we started with

Question 18

How does the 10 (CCC) convert into 6 (CCC CC)

Answer 18

6 ATP breaks apart, releasing energy and turns into 6 ADP

Question 19

What are the 3 Phases that occur in this entire process?

Answer 19

Carbon Fixation, Reduction, and Regeneration

Question 20

When do the 3 Phases occur in this entire process?

Answer 20

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)