The apoplast pathway in plants includes all the following except:
1. the lumen of a xylem vessel
2. the lumen of a sieve tube
3. the lumen of tracheids
4. the cell wall of a root hair

Subtopic:  Pathways of transport |
 58%
From NCERT
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The ions that plays the primary role in basic transport processes in plant cells is:
1. Na+
2. K+
3. H+
4. Cl-

Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
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Osmosis in plants would not be affected by:
1. water potential gradient
2. a difference in solute concentrations
3. type of cell membrane receptor proteins
4. number of aquaporins

Subtopic:  Osmosis |
 60%
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Active transport of substances does not involve:
1. transport of solute along the concentration gradient.
2. use of a specific membrane transport protein.
3. hydrolysis of ATP.
4. transport of solute against a concentration gradient.

Subtopic:  Means of Transport: Active |
 80%
From NCERT
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The proton pump in the plasma membrane of a plant cell does not:
1. hydrolyze ATP
2. establish a proton gradient across the membrane
3. generate a membrane potential
4. equalize the charge on each side of a membrane

Subtopic:  Membrane Transport |
 52%
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The direction of water movement in plants can always be predicted by measuring:
1. pressure potential
2. number of aquaporins
3. proton gradients
4. water potential (ψ)

Subtopic:  Water Potential Concept |
 81%
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The water potential (Ψ) of pure water in a container open to atmosphere under standard conditions is:
1. -0.1 MPa.
2. +0.1 MPa.
3. +0.5 MPa.
4. 0.0.

Subtopic:  Water Potential Concept |
 82%
From NCERT
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Water potential (Ψ) in plants is affected by:
I. mechanical pressure.
II. matrix effects (e.g., fluid cohesion and surface tension).
III. dissolved solutes.
IV. osmosis.
1. I, II and III only
2. I, III and IV only
3. II, III and IV only
4. I, II, III and IV

Subtopic:  Water Potential Concept |
 52%
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Give ψP = 0.25 MPa and ψS = -0.50 MPa,what will be the resulting Ψ:
1. +0.75 MPa.
2. -0.75 MPa.
3. -0.25 MPa.
4. +0.25 MP

Subtopic:  Water Potential Concept |
 78%
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The water potential [Ψ] in root tissue was found to be -0.13 MPa. The Ψ of 0.1 M solution of sucrose is -0.23. If the root tissue is placed in this solution, the net water movement is expected to be
1. from the root tissue into the sucrose solution.
2. from the sucrose solution into the root tissue.
3. equal in both direction.
4. requiring ATP hydrolysis for either direction.

Subtopic:  Water Potential Concept |
 67%
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