Which statement about rubisco is true?
A) It is a carbohydrate.
B) It generates a six-carbon molecule that splits into two molecules of 3PG.
C) It is found only in algae.
D) It is the second enzyme in the Calvin cycle.
E) It is extremely scarce on Earth.

Question

Quizplus · Accepted Answer

Rubisco (ribulose-1,5-bisphosphate carboxylase/oxygenase) is an enzyme that catalyzes the fixation of carbon dioxide into a six-carbon molecule, which then splits into two molecules of 3-phosphoglycerate (3PG). This is the first step of the Calvin cycle, which is responsible for carbon fixation in photosynthesis. Rubisco is found in all photosynthetic organisms, including algae, plants, and some bacteria. While it is not a carbohydrate itself, it plays a critical role in the production of carbohydrates during photosynthesis. Rubisco is one of the most abundant enzymes on Earth.

Which Statement About Rubisco Is True