Most biomass on the biosphere has carbon fixed by chloroplasts and bacteria through __________.

Question

Quizplus · Accepted Answer

The reductive pentose phosphate cycle (also known as the Calvin cycle) is the main process by which carbon is fixed by chloroplasts and some bacteria. This cycle converts carbon dioxide and energy from ATP and NADPH into organic compounds, including sugars, which can then be used as building blocks for biomass. The other pathways listed (acetyl-CoA pathway, the reverse tricarboxylic acid cycle, and the 3-hydroxypropionate cycle) are also involved in carbon fixation, but they are less common in photosynthetic organisms and are not the primary pathways for biomass production.

Most Biomass on the Biosphere Has Carbon Fixed by Chloroplasts