LDR

Question 1

chlorophyll adaptations

Answer 1

• thlyakoid: SA
• proteins hold chlorophyll for max absorption
• DNA + ribosomes

Question 2

where does the ldr take place

Answer 2

thylakoid

Question 3

1: photoionisation

Answer 3

light enters photoionisation

electrons move to a higher energy level

released to the PSI

Question 4

2: photolysis

Answer 4

replace electrons

H2O -> 2H+ + 0.5O2 + 2e-

uses energy from light

Question 5

3: transport chain

Answer 5

electrons move down transport chain and lose energy

this energy transports H+

Question 6

4: chemiosmosis

Answer 6

H+ diffuse into stroma

through ATP synthase

ATP synthesis

Question 7

5: NADP

Answer 7

light enters PSI

excites electrons

electrons transferred to NADP and H from stroma

Question 8

6: cyclic phosphorylation

Answer 8

produces ATP

passed back to PSI via electron carriers

not passed onto NADP

Question 9

LDR steps

Answer 9

photoionisation

photolysis

transport chain

chemiosmosis

NADP

cyclic phosphorylation

Question 10

LDR MS

Answer 10

chlorophyll absorb light energy

excited electrons released

electrons move along carriers and release energy

energy used to ATP and Pi to form ATP

photolysis of water produces H+, e-, O2

NADP reduced by electrons and H+