Which organelle is not involved in photorespiration?

Photorespiration is a process that occurs primarily in plants and involves various organelles where specific biochemical reactions take place. In this context, chloroplasts, mitochondria, and peroxisomes all participate in the photorespiration pathway.

Chloroplasts are essential as they are the site of photosynthesis and are involved in the initial reactions where oxygen is consumed and carbon dioxide is released in low carbon dioxide conditions. Mitochondria play a role in cellular respiration, where they help in processing the byproducts produced during photorespiration. Peroxisomes are involved in metabolizing the glycolate produced during the process, thus playing a crucial role in managing and recycling substances.

In contrast, the Golgi apparatus is not involved in photorespiration. Its primary functions are related to modifying, sorting, and packaging proteins and lipids for secretion or for use in the cell. Therefore, it is not directly engaged in the biochemical processes associated with photorespiration, making it the correct choice in identifying the organelle not involved in this specific function.