Photosynthesis- Light independent reaction

Question 1

Describe the 1st step of the light-independent reaction.

Answer 1

-Carbon dioxide reacts with ribulose bisphosphate to form 2 molecules of glycerate 3 phosphate
-Reaction is catalysed by Rubisco

Question 2

What is rubisco

Answer 2

An enzyme which catalyses the reaction between carbon dioxide and ribulose bisphosphate

Question 3

Describe the 2nd step of the light-independent reaction

Answer 3

-ATP and NADPH from the light-independent reaction are used to reduce GP to triose phosphate
-ATP provides energy for this reaction (reduced NADP also provides some energy

Question 4

What is the 3rd step of the reaction?

Answer 4

-Some of the triose phosphate is converted back into ribulose bisphosphate

Question 5

What is the 4th step of the reaction?

Answer 5

-Some of the triose phosphate is converted to useful organic substances such as
-Glucose
-Sucrose
-Starch
-Cellulose
-Lipids
-Amino acids

Question 6

Inorganic carbon (in carbon dioxide) is 1._______ into organic compounds

Answer 6

1. Fixed

Question 7

Where does the reduced NADP and ATP come from?

Answer 7

Light independent reactions

Question 8

How many carbon atoms does carbon dioxide have?

Answer 8

1

Question 9

How many carbon atoms do TP/GP have?

Answer 9

3

Question 10

How many carbon atoms does RuBP have?

Answer 10

5

Question 11

Which chemicals remain relatively constant when PS is happening (chemicals are recycled within chloroplast)

Answer 11

-TP
-GP
-RuBP
-NADPH
-ATP
-Rubisco

Question 12

Which chemicals are used in photosynthesis?

Answer 12

-CO2
-H20

Question 13

Which chemicals are produced in photosynthesis?

Answer 13

-Glucose
-Oxygen