Question 9

Photosynthesis releases oxygen

Photosynthesis is the process by which plants convert sunlight into energy, producing glucose and releasing oxygen as a byproduct. This is a fundamental aspect of the photosynthetic process, highlighting its role in providing oxygen to the atmosphere.

A) Photosynthesis releases oxygen

This statement is correct as it accurately describes one of the key outcomes of the photosynthesis process. During photosynthesis, carbon dioxide and water are transformed into glucose and oxygen, the latter being released into the environment, which is essential for the survival of aerobic organisms.

B) Respiration produces glucose

This statement is incorrect. Respiration is the process by which cells break down glucose to release energy. Instead of producing glucose, respiration consumes it, converting it back into carbon dioxide and water, while releasing energy.

C) Respiration releases oxygen

This statement is also incorrect. Respiration primarily consumes oxygen to break down glucose, and it releases carbon dioxide and water as byproducts. Therefore, it does not contribute to the release of oxygen, but rather, it consumes it.

D) Photosynthesis produces water

This statement is misleading. While water is a reactant in the photosynthesis process, it is not a product. Instead, photosynthesis produces glucose and oxygen, and water is utilized in the process rather than generated.

Conclusion

The correct answer is that photosynthesis releases oxygen, a crucial process for sustaining life on Earth. The other options misrepresent the processes of respiration and photosynthesis, either by incorrectly stating the outputs or mischaracterizing the functions of these vital biological processes.