Movement of molecule across a typical plant cell i.e. 50 micrometer takes

(1) 10 seconds

(2) 15 seconds

(3) 2.5 seconds

(4) 16 seconds

Subtopic:  Water Absorption |
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Mass flow or bulk flow system is the movement of substances in bulk or in masse from one point to another point as a result of

(1) Pressure Difference between two points

(2) Osmotic gradient between two points

(3) Concentration gradient between two points

(4) Cannot be predicted

Subtopic:  Phloem Translocation |
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Mass flow

(1) Solids move slowly

(2) Liquid move faster

(3) All move through the same pace

(4) Solids move faster due to high Osmotic pressure

Subtopic:  Pathways of transport |
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Bulk flow can be achieved by

(1) Positive hydrostatic pressure

(2) Negative hydrostatic pressure

(3) Both A and B

(4) Concentration gradient

Subtopic:  Pathways of transport |
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If mass flow is occurring like a garden hose,

(1) It is due to positive hydrostatic pressure

(2) It is due to negative hydrostatic pressure

(3) It is due to concentration gradient

(4) All of these

Subtopic:  Phloem Translocation |
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If mass flow is occurring like suction through a straw

(1) It is due to positive hydrostatic pressure

(2) It is due to negative hydrostatic pressure

(3) It is due to concentration gradient

(4) All of these

Subtopic:  Water Potential Concept |
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Xylem transports from roots to the aerial parts of the plants

(1) Water, mineral salta

(2) Some organic Nitrogen

(3) Inorganic solutes, Hormones

(4) All of these

Subtopic:  Ascent of Sap |
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The apoplast does not hold true which of the following statements?

(1) System of adjacent cell walls that is continuous throughout the plant

(2) Not continuous path at the place of casparian strips of the endodermis in the roots

(3) Occurs through the intercellular spaces and the walls of the cells

(4) Crosses cell membrane

Subtopic:  Water Absorption |
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Apoplast movement

Find the wrong one.

(1) Dependent on gradient

(2) Water movement is through mass flow

(3) The continuous stream of water gets tension when water is absorbed by root hairs

(4) Mass flow of water occurs due to adhesive and cohesive properties of water

Subtopic:  Water Absorption |
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Symplastic system

Find the wrong one.

(1) System of interconnected protoplasts

(2) Involves path through plasmodesmata

(3) Water has to enter the cells through the cell membrane

(4) Above a potential gradient movement

Subtopic:  Water Absorption |
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