Mass flow seems to be the prominent mode of transport during

1. Translocation of organic solutes within phloem.

2. translocation of water and minerals in xylem

3. Apolplastic movement of water in plants

4. All of the above

Consider the following two statements:

I. The direction of movement in the phloem is bi-directional.

II. The source-sink relationship in plants is variable.

1. Both I and II are correct and II explains I

2. Both I and II are correct but II does not explain I

3. I is correct but II is incorrect

4. Both I and II are incorrect 

The most abundant solute in the phloem sap is :
1. Potassium ions
2. Sucrose
3. Glucose
4. Starch

Which one of the following elements in plants is not remobilised?

1. Calcium

2. Potassium

3. Sulphur

4. Phosphorus

Phloem sap is mainly:-

1.  Water and osmotically inactive disaccharides only

2.  Water and PGRs only

3.  Water and osmotically active disaccharides 

4.  Minerals and PGRs only

The form of sugar transported through phloem is

1.  glucose

2.  fructose

3.  sucrose

4.  ribose

Phloem sap in the plants mainly consists of : 
1. fructose and water 
2. fructose and sucrose 
3. glucose and water 
4. sucrose and water 

During translocation of sugars in plants from source to sink:

1. The loading of sugar at source is by active transport and unloading at the sink is by passive transport.

2. The loading of sugar at source is by passive transport and unloading at the sink is by active transport.

3. Both loading at the source and unloading at the sink are by active transport.

4. Both loading at the source and unloading at the sink are by passive transport.

Continuity of protoplasm in sieve elements is maintained through

1. Cytoplasmic strands

2. P proteins

3. Vacuoles

4. Walls