Photosynthesis and cellular respiration both involve the use and release of gases. Which statement correctly identifies the role of gases in the two processes?

Question

a
Photosynthesis and cellular respiration both use oxygen and release carbon dioxide.
b
Cellular respiration uses carbon dioxide and releases oxygen, while photosynthesis uses oxygen and releases carbon dioxide.
c
Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.
d
Photosynthesis and cellular respiration both use carbon dioxide and release oxygen.

Answer 1

The correct statement that identifies the role of gases in photosynthesis and cellular respiration is:

c: Cellular respiration uses oxygen and releases carbon dioxide, while photosynthesis uses carbon dioxide and releases oxygen.

In summary:

• Photosynthesis, which occurs in plants, algae, and some bacteria, uses carbon dioxide (CO₂) and water (H₂O) to produce glucose (C₆H₁₂O₆) and oxygen (O₂).
• Cellular respiration, which occurs in nearly all living organisms, uses glucose and oxygen (O₂) to produce carbon dioxide (CO₂), water (H₂O), and energy (ATP).