Chapter 8: Photosynthesis, Part 2

Question 1

CO2 fixation takes place in the light-dependent reactions of photosynthesis

Answer 1

Calvin cycle

Question 2

•Carbon from CO2 is added to ribulose 1,5-bisphosphate (RuBP) to produce two 3-phosphoglycerate (3PGA)

Answer 2

carbon fixation

Question 3

Reactions oxidizing NADPH and consuming ATP convert 3PGA into G3P •2 molecules of G3P leave the cycle and form glucose

Answer 3

reduction

Question 4

Some G3P molecules are used to produce RuBP (with energy from ATP) and the cycle begins again

Answer 4

regeneration

Question 5

CO2 combines with RuBP, forming a six-carbon molecule that is split to form two
3PGA

Answer 5

RuBP carboxylase/oxygenase (RuBisCo)

Question 6

A phosphate group from ATP is added to each 3PGA, producing two 1,3-
bisphosphoglycerate

Answer 6

3-phosphoglycerate kinase

Question 7

Each 1,3-bisphosphoglycerate is reduced by electrons from NADPH, and
phosphate is removed, yielding G3P

Answer 7

1,3-bisphosphoglycerate kinase

Question 8

Phosphate is transferred from ATP to ribulose 5-phosphate to regenerate RuBP

Answer 8

Ribulose 5-phosphate kinase