Root pressure develops due to?
1. Active absorption
2. Low osmotic potential in Soil
3. Passive absorption
4. Increase in transpiration

Subtopic:  Ascent of Sap |
 54%
From NCERT
NEET - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

A column of water within xylem vessels of tall trees does not break under its weight because of?
1. Dissolved sugar in water
2. Tensile strength of water
3. Lignification of xylem vessels
4. Positive root pressure

Subtopic:  Transpiration Pull: Illustration |
 72%
From NCERT
NEET - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

Transpiration and root pressure cause water to rise in plants by:

1. pulling it upward
2. pulling and pushing it, respectively
3. pushing it upward
4. pushing and pulling it, respectively

Subtopic:  Transpiration & Guttation |
 70%
From NCERT
NEET - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

In a ring-girdled plant:

1. the shoot dies first
2. the root dies first
3. the shoot and root die together
4. Neither root nor shoot will die

Subtopic:  Phloem Translocation |
 76%
NEET - 2015
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which one gives the most valid and recent explanation for stomatal movements?
1. Transpiration
2. Potassium influx and efflux
3. Starch hydrolysis
4. Guard cell photosynthesis

Subtopic:  Stomata: 3 | Stomata |
 72%
NEET - 2015
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Hints

Which of the following criteria does not pertain to facilitated transport?
1. High selectivity
2. Transport saturation
3. Uphill transport
4. Requirement of special membrane proteins
Subtopic:  Means of Transport: Active |
 85%
AIPMT - 2013
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Hints

Which one of the following is correctly matched?

1. Passive transport of nutrients-ATP

2. Apoplast- Plasmodesmata

3. Potassium- Readily mobilized

4. Bakanae of rice seedlings-F Skoog

Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
 72%
From NCERT
AIPMT - 2012
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NEET 2023 - Target Batch - Aryan Raj Singh
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Which one of the following elements in plants not re-mobilized?
1. Calcium 2. Potassium
3. Sulphur 4. Phosphorus
Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
 89%
From NCERT
AIPMT - 2011
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Guttation is the result of:
1. Root pressure
2. Diffusion
3. Transpiration
4. Osmosis

Subtopic:  Transpiration & Guttation |
 89%
From NCERT
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh
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Function of companion cells is:

1. Loading of sucrose into sieve elements
2. Providing energy to sieve elements for active transport
3. Providing water to phloem
4. Loading of sucrose into sieve elements by passive transport
Subtopic:  Phloem Translocation |
 61%
From NCERT
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh