Photorespiration is also known as which of the following?

Photorespiration refers to a light-dependent metabolic process in plants where oxygen is consumed and carbon dioxide is released, typically occurring when the enzyme RuBisCO oxygenates ribulose bisphosphate instead of carboxylating it during the Calvin cycle. This process is also referred to as C2 photorespiration because it leads to the formation of a two-carbon compound, glycolate, which is then converted to other compounds through a series of metabolic reactions.

The term C2 highlights the structure of the intermediate, and distinguishes it from other forms of carbon fixation processes, such as C4 photosynthesis, which is a distinct pathway utilized by some plants to minimize photorespiration by concentrating carbon dioxide. Glycolysis, on the other hand, is the metabolic pathway that breaks down glucose for energy and is not directly related to photorespiration. The Calvin cycle is part of the photosynthesis process where carbon fixation occurs but does not involve the specific pathways and outcomes associated with photorespiration.

Thus, the term C2 photorespiration accurately encapsulates the unique biochemical processes and the molecular intricacies involved in this phenomenon.