This process, called photosynthesis, is essential to the global carbon cycle and organisms that conduct photosynthesis represent the lowest level in most food chains (Figure 1). Most living things ...

Photosynthesis: A Chemical and Biological ... of carbon dioxide in a process known as photorespiration. This wasteful pathway results in the consumption—not production—of energy.

Cyanobacteria began contributing oxygen to Earth’s mostly noxious atmosphere more than 2 billion years ago. The photosystem ...

Catabolic – this type of pathway releases energy and is used to break down large molecules into smaller ones (degradation). An example of an anabolic reaction is photosynthesis, where plants ...

Among the plant metabolisms in use today, some use significantly more efficient carbon fixation pathways, while others end up wasting a lot of the energy they obtained from photosynthesis with ...