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WorksheetsTransport in Plants- Quiz 5
Total questions: 20
Worksheet time: 8mins
During plasmolysis what occurs?
Movement of water occurs across the membrane from an area of higher water potential to lower water potential
Movement of water occurs across the membrane from an area of low water potential to high water potential
Water moves inside the cell until equilibrium is reached
O. P. of cell remains the same
When a plasmolysed cell is placed in water or hypotonic solution, what happens?
T.P. of cell decreases
T.P. of cell becomes zero
T.P. increases
Water potential of cell decreases
Mass or bulk flow of substance is called –
Active transport
Translocation
Diffusion
Facilitated diffusion
Unidirectional flow of water, minerals, some organic nitrogen and hormones occurs through –
Xylem
Phloem
Root
Vascular tissue
Multidirectional flow of a variety of organic and inorganic solutes occurs through –
Xylem
Vascular tissue
Phloem
Root
Which of the following is the part of apoplast?
Cell wall
Plasma membrane
Plasmodesmata
Cytoplasm
Water moving through the apoplast from the soil to stele cells must crosses a plasma membrane in the cells of
Root hairs
Cortex
Endodermis
Vessel
__________ are generally moved by a mass or bulk flow system.
Water and minerals
Water and organic molecule
Water, minerals and food
Only water
Endodermal cells differ from other cells in root. They –
Lack symplast region
Have a high rate of water transport
Are completely surrounded by a waxy layer
Prevent water and ions from moving between them
Cell walls impregnated with water repellent suberin are found in the cells of –
Endodermis
Pericycle
Trancheids
Root hairs
The primary function of casparian strips is to –
force water and minerals through the membranes of endodermal cells
prevent entry into the stele solely through the apoplast
provide regulation for water and minerals movement in the plants
All
The primary difference between the apoplast and the symplast is that the –
apoplast is non-living spaces and cell walls
apoplast relies on active transport
symplast is nonliving spaces and cell wall
apoplast prevents passive diffusion
Which of the following is not a component of the symplast?
Sieve tube
Endodermal cells
Plasmodesmata
Xylem tracheids
The casparian strip prevents water and minerals from entering the stele through the –
Plasmodesmata
Apoplast
symplast
Xylem vessel
All of the following increase the surface area available for absorption of water and minerals by a root except –
Mycorrhiza
Numerous branches of root
Root hairs
None
All are correct except –
Mycorrhizal fungi form a network around the young root and they penetrate the root cells
Mycorrhizae helps the plant to absorb water and minerals
Root provides sugar and nitrogenous organic compounds to the mycorrhizae
Pinus seed can germinate and establish without mycorrhizae
Root pressure –
Is not sufficient to rise water above ground level
Is negative in all except the tallest trees
Is the driving force for the mass flow of sugar
can push water upto small heights in the stem
As various ions from the soil are actively transported into vascular tissues of root, water follows and increases the pressure inside the xylem. This positive pressure is called
Mass pressure
Root pressure
osmotic potential
None
The transpiration driven ascent of sap depends on which of the following physical properties of water?
Cohesion
Surface tension
Adhesion
All
What is the minimum number of cell membranes that a water molecule must move through in getting from soil into a xylem vessel –
0
1
2
6
