Final answer:
Chemosynthesis occurs in chemoautotrophic cells to produce organic matter without sunlight, and ATP synthase serves dual functions in cellular respiration.
Step-by-step explanation:
Chemosynthesis is indeed a process that occurs within certain types of cells. This process is true about cells, specifically for those that are chemoautotrophic. Chemoautotrophs are organisms that use chemosynthesis to convert inorganic substances into organic matter without the need for sunlight, unlike photosynthesis which requires light energy. This process is particularly common in organisms that live in environments where sunlight is not available, such as deep-sea hydrothermal vents.
Also, the claim that 'All organisms perform cellular respiration using carbon dioxide and glucose' is not entirely accurate, as not all organisms rely on glucose and many anaerobic organisms do not use oxygen in their respiration process. Furthermore, ATP synthase does indeed act as an enzyme and a channel protein, facilitating the production of ATP during cellular respiration. It is also true that during cellular respiration, NADH and ATP are not used to make glucose; rather, glucose is broken down to produce ATP and NADH.