Select the incorrect statement. [Re-NEET 2020]

Correct Answer: D. Unloading of sucrose at sink does not involve the utilization of ATP

This statement is incorrect. The unloading of sucrose at the sink (such as roots, fruits, or seeds) does involve ATP, especially when it occurs against the concentration gradient. Active transport mechanisms use proton pumps and transporter proteins, which require energy in the form of ATP. Therefore, unloading is not always passive.

In contrast, phosphorus, sulphur, nitrogen, and potassium are indeed mobile and can be translocated within the plant. Phloem transport is bidirectional, and xylem transport is unidirectional, generally from roots to aerial parts. Hence, option D is incorrect.