NLN PAX Nursing Admission Exam

Answer: C - Oxygen. Oxygen is released as a byproduct of photosynthesis in plants.

Key Takeaway: Photosynthesis is a process that converts carbon dioxide and water into organic compounds such as sugars using sunlight as energy. Oxygen is released as a byproduct of this process, in the same way that carbon dioxide is released by humans as a byproduct of aerobic respiration. Nitrogen and carbon monoxide are not involved in either process.