YESPYQ Start Practice
🛠️ JEE🧬 Biology

Transport in Plants

1 JEE Biology previous year questions on Transport in Plants — options free on every question; 1 include the answer & explanation free, the rest unlock with PYQ Pass.

Q1 FREE PREVIEW

Select the incorrect statement.

[Re-NEET 2020]

a

Elements most easily mobilized in plants from one region to another are : phosphorus, sulphur, nitrogen and potassium

b

Transport of molecules in phloem can be bidirectional

c

Movement of minerals in xylem is unidirectional

d

Unloading of sucrose at sink does not involve the utilization of ATP

✓ Correct answer: d)

Unloading of sucrose at sink does not involve the utilization of ATP

Explanation

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.

Practice more JEE Biology PYQs

Browse every Biology chapter, or explore the full JEE question bank.

🧬 All Biology chapters →