Phloem Transport
Phloem Transport: Overview
This topic covers concepts, such as, Phloem Sap, Pressure Flow Hypothesis, Bidirectional Flow & Phloem Loading etc.
Important Questions on Phloem Transport
The main function of phloem is translocation of

Which one of the following is a protein deficiency disease?

According to the pressure flow hypothesis, loading of the phloem sets up a

Which phenomenon causes the movement of water from the adjacent xylem into the phloem?

A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?

The translocation in phloem is explained by the

The form of sugar transported through phloem is


Phloem translocates a variety of
A. Organic solutes.
B. Inorganic solutes.
C. Water.


Select the incorrect pair from the following.

Read the given statements and select the correct option.
Statement : Xylem transport is unidirectional.
Statement : Phloem transport is bi-directional.

What is the direction of movement of sugars in phloem?



Assertion : The movement of photosynthates is unidirectional.
Reason : Movement of photosynthates occurs with the water.

A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicate that it is phloem sap?


“Cytoplasmic streaming hypothesis” is concerned with

During translocation; the highest carbohydrate content is found in:
