Question

One of the disadvantages of the C4 pathway is that it requires:

A. more O2.
B. more NADPH.
C. more light.
D. more ATP.
E. a much higher temperature.

Answer 1

The C4 pathway in photosynthesis requires more ATP energy. It is less efficient in terms of ATP usage compared to C3 photosynthesis but is more efficient in water use, making it suitable for drier regions. It is favored in higher temperatures.

Step-by-step explanation:

The C4 pathway in photosynthesis has several disadvantages, and one of them is that it requires more ATP. In this pathway, there are additional steps before entering the C3 pattern, which results in an increased demand for ATP energy. Although C4 photosynthesis is less efficient than C3 photosynthesis in terms of ATP usage, it is more efficient in conserving water, making it more suitable for drier regions. Additionally, C4 photosynthesis is favored in higher temperatures.