Assertion: The concentration of free sugar in the sink is always lower than in the sieve tube.
Reason: The unloaded sugar is consumed during growth or metabolism or converted to insoluble polymers such as starch.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false

Subtopic:  Phloem Translocation |
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Assertion: Removing sinks is a useful horticulture practice such as in production of larger sized apples.
Reason: If sinks are more than the source can support, plants may undergo self-thinning.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Phloem Translocation |
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Diffusion:
I. does not require any energy expenditure
II. is dependent on a living system
III. is a fast process
IV. is the only means for gaseous movements in plants
1. Only I and IV are correct
2. Only I, II and IV are correct
3. Only I, III and IV are correct
4. Only II and III are correct

Subtopic:  Diffusion |
 61%
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Substances that have a hydrophilic moiety:
1. have to be transported across the plasma membrane by active transport
2. can diffuse across the plasma membrane at a slower rate, if larger in size
3. do not need a concentration gradient to diffuse across the plasma membrane
4. need to be facilitated even along the concentration gradient

Subtopic:  Introduction | Membrane Transport | Means of Transport: Passive |
 60%
From NCERT
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Facilitated diffusion allows cells to:
1. achieve uphill transport without ATP energy
2. select substances for uptake
3. stop transport of hydrophilic substances
4. decrease the rate of diffusion of lipophilic substances

Subtopic:  Means of Transport: Active | Means of Transport: Passive |
 66%
From NCERT
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In gram negative bacteria the outer membrane:
1. is the major permeability barrier
2. is a thick peptidoglycan layer
3. is more permeable to hydrophilic substances
4. is devoid of lipopolysaccharides

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Unlike a symporter and an antiporter, a uniporter:
1. is not an integral membrane protein
2. is a cell surface carbohydrate
3. is not a co-transporter
4. cannot be used for active transport

Subtopic:  Means of Transport: Passive |
 72%
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What differentiates active transport from facilitated diffusion?
I. Uphill transport
II. Requirement of special membrane proteins
III. Selective nature
1. Only I
2. Only I and II
3. Only I and III
4. Only II and III

Subtopic:  Means of Transport: Passive |
 72%
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Consider the following statements:

I.  Pure water is usually defined as having a solute potential (Ψπ)of zero.
II.  A solution will have a lower and hence more negative water potential than that of pure water.
III.  The more solute molecules present, the more negative the solute potential is.


Correct statements are:
1. I and II
2. I and III
3. II and III
4. I, II and III

Subtopic:  Water Potential Concept |
 73%
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Consider the following statements regarding water potential:
I. Water potential is the potential energy of water relative to pure free water (e.g., deionized water)
in reference conditions.
II. Typically, pure water at standard temperature and pressure (or other suitable reference condition) is defined as having a water potential of 0.
III. The addition of solutes to water increases its potential (makes it more negative), just as the increase in pressure lowers its potential (makes it more positive).
The correct statements are:

1. I, II and III 2. I and II
3. I and III 4. II and III
Subtopic:  Plant Water Relations: Water Potential: DPD |
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