First slide

Phloem Transport: Flow from Source to Sink

Question

Select the incorrect statement.

Moderate

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

Solution

Both in loading and unloading of sucrose or sugars from sieve tube elements are active phenomena and involve utilization of ATP.

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