Consider the following:

I.    A decrease in pressure on cell exerted by the wall
II.   An increase in water potential of the surroundings
III.  The uptake of solutes by the cell
IV.  An increase in the tension on the surrounding solution

Which of these would contribute to the uptake of water by the cell?

1. I, II, III

2. II, III, IV

3. I, II, IV

4. I, III, IV

Subtopic:  Water Potential Concept |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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What is true for both symplast and apoplast movement of water in plants?

1. An equal rate of transport

2. Being down a potential gradient

3. Assistance by cytoplasmic streaming 

4.Conduction through interconnected protoplasts

Subtopic:  Water Absorption |
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Phenyl mercuric acetate (PMA) results in

1. reduced photosynthesis

2. reduced transpiration

3. reduced respiration

4. killing of plants.

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Pressure on a plant cell wall caused osmotic movement of water is called:

1. Osmotic pressure

2. Osmotic potential

3. Turgor pressure

4. Hypertonic pressure

Subtopic:  Plant Water Relations: Water Potential: DPD |
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The most abundant solute in the phloem sap is :
1. Potassium ions
2. Sucrose
3. Glucose
4. Starch

Subtopic:  Phloem Translocation |
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A plant requires potassium for:

(1) Holding its cells together

(2) Synthesizing chlorophyll

(3) DNA replication

(4) Opening and closing its stomata

Subtopic:  Stomata: 3 | Stomata |
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The water potential of pure water is

(1) zero

(2) less than zero

(3) more than zero, but less than one

(4) more than one

Subtopic:  Plant Water Relations: Water Potential: 2 | Plant Water Relations: Reverse Osmosis & Water potential: 1 | Plant Water Relations: Reverse Osmosis & Water Potential |
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Which of the following facilitates opening of stomatal aperture :-

(1) Contraction of outer wall of guard cells

(2) Decrease in turgidity of guard cells

(3) Radial orientation of cellulose microfibrils in the cell wall of guard cells

(4) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells

Subtopic:  Stomata: 3 | Stomata |
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A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?

(1) Acidic

(2) Alkaline

(3) Low refractive index

(4) The absence of sugar

Subtopic:  Ascent of Sap |
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Root pressure develops due to

1. active absorption

2. low osmotic potential in soil

3. passive absorption

4. increase in transpiration

Subtopic:  Radial Transport |
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NEET 2021 - Achiever Batch - Aryan Raj Singh
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