7 Photosynthesis

Question 1

overall reaction of phytosynthesis

Answer 1

Energy + 6CO2+6H2O –> C6H12O6 + 6O2

Question 2

overview of photosynthesis

Answer 2

light reactions use energy from sunlight to generate NADPH and ATP & Calvin Cycle uses this E and reducing power to reduce CO2

Question 3

light harvesting complex

Answer 3

an array of protein and chlorophyll molecules embedded in the thylakoid membrane of plants

Question 4

resonance energy transfer

Answer 4

the excess E transferred to another adjacent chlorophyII

Question 5

photosynthesis II: light reaction

Answer 5

energy is passed to P680 in photosynthesis II –> E used to transfer an e- to the primary acceptor –> P680+ –> takes e- from the water and regenerates P680 –> e- passed from primary acceptor to Pq to cytochrome complex to Pc and ATP is made in the process

Question 6

how ATP is made in the process of e- passing from primary acceptor to Pq to cytochrome complex to Pc

Answer 6

by chemiosomosis

Question 7

light reaction: photosynthesis I

Answer 7

e- passed from Pc to P700+ –> P700 –> Fd –> NADP+ –> NADPH

Question 8

Calvin Cycle

Answer 8

3 cycle uses 9 ATP, 6 NADPH nets 1 G3P

Question 9

G3P can be used to

Answer 9

synthesize glucose

Question 10

plants exchange gases for photosynthesis via

Answer 10

stomata

Question 11

RuBisCo

Answer 11

photorespiration generates CO2, which can enter the Calvin Cycle

Question 12

photorespiration

Answer 12

O2 –> CO2

Question 13

what will happen to Calvin Cycle with photorespiration

Answer 13

would be impaired by low CO2 concentration –> CO2 falls, O2 rises

Question 14

plants from arid climates evolved two ways to avoid photorespiration

Answer 14

1. C4 plants spatially separate the fixation of CO2 from the Calvin Cycle
2. CAM plants temporally separate the fixation of CO2 from the Calvin Cycle