Based on the given information, do you have evidence that cellular respiration occured in leaves? Explain.
1. rates of respiration of leaves. (ppt/min)
a. as detected by oxygen gas sensor: 0.1633 ppt/min
b. as detected by carbon dioxide gas sensor: -0.1105 ppt/min
2. rates of photosynthesis of leaves. (ppt/min)
a. as detected by oxygen gas sensor: 0.2568 ppt/min
b. as detected by carbon dioxide gas sensor: -0.001116 ppt/min
During respiration, complex carbohydrates are broken down to release energy and water and carbon dioxide are the waste products of this reaction. Respiration leads to an increase in carbon dioxide and a decrease in oxygen.
In photosynthesis, plants use energy from the sun to convert water and carbon dioxide into complex carbohydrates and oxygen. The result of photosynthesis is an increase in oxygen and a decrease in carbon dioxide.
From the values given above, during photosynthesis there is an increase in the levels of oxygen and a decrease in the levels of carbon dioxide, this shows that it occurred.
But as in the case of respiration also, there is an increase in the level of oxygen and a decrease in the level of carbon dioxide, it did not occur.