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Q. No.

Guttation is the result of :
1. Root pressure
2. Diffusion
3. Transpiration
4. Osmosis

Q9:
 90% From NCERT AIPMT - 2011
Subtopic:  Transpiration & Guttation |
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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

Q10:
 60% From NCERT AIPMT - 2011
Subtopic:  Phloem Translocation |
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The translocation of organic solutes in sieve tube members is supported by:

1. root pressure and transpiration pull

2. P-proteins

3. mass flow involving a carrier and ATP

4. cytoplasmic streaming

Q13:
 56% AIPMT - 2006
Subtopic:  Phloem Translocation |
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Two cells A and B  are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure-7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be:

1. Movement of water from cell B to A

2. No movement of water

3. Equilibrium between the two

4. Movement of water from cell A to B

Q12:
 69% AIPMT - 2007
Subtopic:  Plant Water Relations: Water Potential: DPD |
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The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of

1.  lignified thick walls

2.  cohesion and adhesion

3.  weak gravitational pull

4.  transpiration pull

Q11:
 72% AIPMT - 2008
Subtopic:  Transpiration & Guttation | Transpiration Pull: Illustration |
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Which one of the following elements in plants not re-mobilized?
1.  Calcium

2.  Potassium
3.  Sulphur
4.  Phosphorus

Q8:
 90% From NCERT AIPMT - 2011
Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
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Which one of the following is correctly matched?

1. Passive transport of nutrients-ATP

2. Apoplast- Plasmodesmata

3. Potassium- Readily mobilized

4. Bakane of rice seedlings-F Skoog

Q7:
 71% From NCERT AIPMT - 2012
Subtopic:  Photosynthesis Transpiration Compromise & Mineral Translocation |
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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
Q6:
 85% AIPMT - 2013
Subtopic:  Means of Transport: Active |
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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

 

Q5:
 74% NEET - 2015
Subtopic:  Stomata: 3 | Stomata |
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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

 

Q4:
 77% NEET - 2015
Subtopic:  Phloem Translocation |
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