Video 3.3 Photosynthesis Part 2

What are the three main phases of the Calvin Cycle?

• Carbon fixation, Energy investment and harvest, Regeneration of RuBP

• Carbonation, Reduction, Regeneration

• Light-dependent reactions, Light-independent reactions, Glucose synthesis

• Absorption, Conversion, Release

What is the primary event that occurs during the carbon fixation phase of the Calvin Cycle?

• Carbon dioxide is combined with RuBP, catalyzed by RuBisCo.

• ATP and NADPH are produced.

• G3P molecules are harvested to build glucose.

• RuBP is regenerated from G3P.

What happens to the three-carbon products from carbon fixation during the energy investment and harvest phase?

• They are reduced and phosphorylated into glyceraldehyde-3-phosphate (G3P).

• They are immediately converted into glucose.

• They are broken down to release carbon dioxide.

• They combine with more RuBP to form a six-carbon product.

How many G3P molecules are removed from the Calvin Cycle to be used for building glucose or other organic molecules, and how many are used to regenerate RuBP?

• One G3P is removed, and five G3Ps are used to regenerate RuBP.

• Three G3Ps are removed, and three G3Ps are used to regenerate RuBP.

• Six G3Ps are removed, and none are used for regeneration.

• Two G3Ps are removed, and four G3Ps are used to regenerate RuBP.