Final answer:
Marine molluscs use various enzymes like superoxide dismutase and peroxidase to maintain cytosolic redox balance under anoxia, but the specific enzyme name in the anoxia tolerant marine molluscs is not provided in the reference material.
Step-by-step explanation:
The enzyme that anoxia tolerant marine molluscs use to maintain cytosolic redox balance is not explicitly mentioned in the provided reference material. However, in general, organisms under anoxic conditions will utilize alternative electron transport system carriers and enzymes involved in anaerobic respiration to maintain energy balance and cellular function. Enzymes like superoxide dismutase (SOD), peroxidase, and catalase are key in detoxifying reactive oxygen species that can accumulate. Moreover, facultative anaerobes have access to multiple ATP-forming pathways and the requisite enzymes to protect cells from oxidative stress, suggesting that these enzymes may be integral to survival in anoxic environments. An understanding of these mechanisms is crucial for comprehending how marine organisms adjust to varying oxygen levels and protect themselves from the harmful effects of reactive oxygen species.