Question

During day light hours, the rate of photosynthesis is higher than that of respiration and the ratio of oxygen produced to that of consumed is?

• A. $10:1$
• B. $5:1$
• C. $1:1$
• D. $50:1$

Answer 1

The correct option is A $10:1$

Photosynthesis. Photosynthesis is the process by which plants, some bacteria and some protistans use the energy from sunlight to produce glucose from carbon dioxide and water. Photosynthesis uses carbon dioxide and makes oxygen faster than respiration produces carbon dioxide and consumes oxygen. Extra oxygen is released into the atmosphere. During daytime, photosynthesis produces oxygen and glucose faster than respiration consumes it. Photosynthesis also uses carbon dioxide faster than respiration produces it. Oxygen surplus is released into the air and unused glucose stored in the plant for later use. So the ratio of oxygen produced to that of consumed would be 10:1.

So the correct option is '10:1'