3.5.1 | PHOTOSYNTHESIS

Question 1

where does the light-dependent reaction occur

Answer 1

thylakoid membrane

Question 2

name the molecules produced in the light-dependent reaction

Answer 2

ATP

Question 3

how is ATP made in the light-dependent reaction

Answer 3

by ATP synthase catalysing the condensation reaction between ATP and Pi

Question 4

how is energy provided to the enzyme to catalyse the production of ATP

Answer 4

diffusion of protons down a proton gradient (chemiosmosis)
protons move from the thylakoid space into the space

Question 5

describe the calvin cycle

Answer 5

carbon dioxide reacts with ruBP and produces GP catalysed by the enzyme rubisco
GP is reduced by NADPH catalysed by ATP to form TP
TP reforms ruBP, one carbon is lost to form organic substances
NADP, ADP and Pi are formed (go to thylakoid membrane for LDR)

Question 6

how many carbons and phosphates does ruBP have

Answer 6

5 carbons 2 phosphates

Question 7

how many carbons and phosphates does GP have

Answer 7

3 carbons 1 phosphate

Question 8

how many carbons and phosphates does TP have

Answer 8

3 carbons 1 phosphate