Photosynthesis

Question 1

light dependent reaction name

Answer 1

oxidative phosphorylation

Question 2

light independent reaction name

Answer 2

Calvin cycle

Question 3

where does oxidation phosphorylation take place?

Answer 3

thylakoid membrane (chloroplast)

Question 4

where does the Calvin cycle take place?

Answer 4

stroma (chloroplast)

Question 5

order of intermediates in the Calvin cycle

Answer 5

• RuBP (ribose bisphosphate)
  –> unstable 6C intermediate
  –> glycerol-3-phosphate
  –> triose phosphate

Question 6

three stages of the Calvin cycle

Answer 6

• carboxylation (form 6C molecule)
• reduction (G3P + H –> TP)
• regeneration
  (TP –> RuBP)

Question 7

what enzyme catalyses the formation of the unstable 6C intermediate in the Calvin cycle?

Answer 7

RuBisCO (ribulose bisphosphate carboxylase)

Question 8

coenzyme in photosynthesis

Answer 8

NADP (H carrier)

Question 9

what is used/made in the Calvin cycle per size cycles (and where)?

Answer 9

12ATP –> 12ADP
(one person molecule of TP in reduction)

6 red NADP –> 6 NADP
(one per molecule of TP in reduction)

6ADP –> 6ATP
(regeneration)

Question 10

how many Calvin cycles to produce one glucose molecule?

Answer 10

six

Question 11

what can TP be used to synthesise?

Answer 11

• glucose
• sucrose
• starch
• cellulose
• amino acids
• fatty acids
• glycerol

Question 12

cyclic phosphorylation

Answer 12

2e- are released from PSI, transported through the e- transport chain and return to PS1 rather than joining with H+ and NADP (2e- don’t need to be replaced by 2e- from PSII)

Question 13

what happens to the H+ after they’ve passed through ATP synthase?

Answer 13

H+ are oxidised by e- and reduce NADP (to form NADPH)

Question 14

what direction are H+ ions pumped in the chloroplasts during chemiosmosis?

Answer 14

from the lumen of the granum into the stroma