Unit 4: Cellular Processes - Calvin Cycle

Question 1

What is the Calvin Cycle?

Answer 1

CO2 is fixed into 3- carbon sugars

Question 2

CALVIN CYCLE EQUATION

Answer 2

ATP + NADPH + Carbon Dioxide yields ADP + NADP+ + glucose

Question 3

Where does the Calvin cycle take place?

Answer 3

The stroma of the chloroplast

Question 4

What are the three steps of the Calvin Cycle?

Answer 4

Carbon Fixation; Reduction; Regeneration

Question 5

What does CO2 bind to in carbon fixation?

Answer 5

RuBP

Question 6

What does the bound CO2 and RuBP split into?

Answer 6

2 3-carbon chains

Question 7

Photosynthesis reaction:

Answer 7

Sunlight + Water + CO2 yields Glucose + O2

Question 8

Dark Reaction Equation:

Answer 8

CO2 + NADPH + ATP yields Glucose + ADP + NADP+

Question 9

What enzyme catalyzes carbon fixation?

Answer 9

Rubisco, an enzyme

Question 10

What happens in reduction?

Answer 10

ATP and NADPH, energy carriers, are used to convert 3PGA into G3P. NADPH also reduces 3PGA by donating an electron.

Question 11

In regeneration, what do the CO2 molecules do?

Answer 11

3 CO2 molecules must go into the reaction to make 6 G3P molecules.

Question 12

What will happen to the G3P’s?

Answer 12

5 G3P’s will be recycled to regenerated 3 RuBP molecules, and 1 G3P will go on to make glucose.

Question 13

What type of energy does regeneration use?

Answer 13

ATP

Question 14

What happens to NADP+ and ADP at the end of the Calvin Cycle?

Answer 14

They are taken back to the light dependent reactions to be recharged.

Question 15

How many times do you have to repeat the cycle?

Answer 15

6 times for each molecule of glucose

Question 16

What is the dark reaction equation?

Answer 16

CO2 + NADPH + ATP yields Glucose + ADP + NADP+