Photosynthesis (Calvin Cycle) (Exam 2)

Question 1

Calvin cycle needs

Answer 1

6 NADPH + 9 ATP

Question 2

Calcin cycle needs more

Answer 2

ATP than noncyclic flow can provide

Question 3

cyclic flow makes

Answer 3

additional ATP

Question 4

cyclic e- flow is necessary bc (2)

Answer 4

• Calvin cycle requires more ATP than NADPH to produce 1 G3P
• & recovers all of the RUBP to continue running the cycle

Question 5

what is produced by the cyclic e- flow

Answer 5

only ATP (NADPH can’t be produced bc there are no electrons donated in the system)

Question 6

cycle e- flow =

Answer 6

between Cytochrome b6f + pc & ps1 + FD)

Question 7

Z-diagram shows

Answer 7

energetics of redox rxns

Question 8

Z-diagram y axis =

Answer 8

the midpoint redox potentials of the redox reactions

Question 9

(Z-diagram) redox potentials change from

Answer 9

high pot E (-) –> (+) low pot E

Question 10

(Z-diagram) absorbed energy leads to

Answer 10

more (-) redox potentials (electrons have negative charge)

Question 11

The energy that excites ps2 is used to

Answer 11

move H+ protons across the thylakoid membrane

Question 12

RuBP =

Answer 12

Ribulose bisphophate

Question 13

Rubisco =

Answer 13

Ribulose bisphophate Carboxylase Oxygenase

Question 14

Rubisco facilitates

Answer 14

RuBP + CO2

Caron fixation

Question 15

# ATP's needed for Calvin cycle =
& made by

Answer 15

9 (made by noncyclic & cyclic e- flow)

Question 16

# NADPH's needed for Calvin cycle =
& made by

Answer 16

6 (made by noncyclic e- flow)

Question 17

RuBP + CO2 –>

Answer 17

unstable compound —> (2) 3PGA

Question 18

(2) 3PGA + 2 ATP –>

Answer 18

(2) 1,3 bisphosphoglycerate + 2 ADP

Question 19

(2) 1,3 bisphosphoglycerate + 2 NADPH –>

Answer 19

(2) G3P

Question 20

NADPH is a

Answer 20

reducer

Question 21

(2) G3P goes to

Answer 21

sugar/sucrose production

Question 22

For every G3P used for sugars –>

Answer 22

3 CO2’s must be fixed