Q. No.All the following are true regarding pressure potential except:
1. It is based on mechanical pressure.
2. By creating this pressure, the plant can maintain turgor, which allows the plant to keep its rigidity.
3. The pressure potential in a plant cell is usually negative.
4. In plasmolysed cells, pressure potential is almost zero.
1. It is based on mechanical pressure.
2. By creating this pressure, the plant can maintain turgor, which allows the plant to keep its rigidity.
3. The pressure potential in a plant cell is usually negative.
4. In plasmolysed cells, pressure potential is almost zero.
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A component of water potential due to the adhesion of water molecules to non-dissolved structures of the system such as soil particles is called as:
1. Matrix potential
2. Gravimetric potential
3. Solute potential
4. Pressure potential
The molar concentration of a sugar solution in an open beaker has been determined to be 0.3M. The solution is kept at 27 degree Celsius. The solute potential will be about:
1. - 3.75
2. - 7.48
3. - 9.18
4. 0
Study the given figure where five beakers filled with a solution have a bag with solution of certain molarity suspended in each of them. The bags are made up of semi-permeable membranes.
What would be the correct order of the beakers in order of the mass of bags after 30 minutes have been allowed to run the experiment [bag with smallest mass to be placed first]?
1. 1, 2, 3, 4, 5
2. 1, 5, 2, 3, 4
3. 4, 3, 2, 5, 1
4. 2, 1, 5, 3, 4
Study the given diagram and choose the correct statement from the options given below:
1. The beet core in beaker A is at equilibrium with the surrounding water.
2. The beet core in beaker B will lose water to the surrounding environment.
3. The beet core in beaker B would be more turgid than the beet core in beaker A.
4. The beet core in beaker A is likely to gain so much water that its cells will rupture.
Identify the incorrect statement regarding plasmolysis in plant cells:
1. If a plant cell is placed in a hypertonic solution, the plant cell loses water and hence turgor pressure by plasmolysis.
2. If cytorrhysis occurs the plant will wilt.
3. Plasmolysis can be reversed if the cell is placed in a hypotonic solution in many cases.
4. Convex plasmolysis is always reversible.
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Rocks can be split by inserting dry wooden stalks in the crevices of the rocks and soaking them in water. The physiological basis of this phenomenon is:
1. Imbibition
2. Crenation
3. Cytorrhisis
4. Reverse osmosis
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What is incorrect regarding apoplast transport in plants?
1. The apoplast is formed by the continuum of cell walls of adjacent cells as well as the extracellular spaces.
2. Transport velocity is lower in the apoplast than in the symplast.
3. Apoplast transport also accounts for a higher proportion of water transport in plant tissues than does symplastic transport.
4. The apoplastic pathway is also involved in passive exclusion.
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Root pressure is caused by:
1. active distribution of mineral nutrient ions into the root xylem.
2. passive distribution of mineral nutrient ions into the root xylem.
3. a lower water potential in soil than the root cells.
4. transpirational pull.
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