Consider the following two statements:

I. The direction of movement in the phloem is bi-directional.

II. The source-sink relationship in plants is variable.

1. Both I and II are correct and II explains I

2. Both I and II are correct but II does not explain I

3. I is correct but II is incorrect

4. Both I and II are incorrect 

Subtopic:  Phloem Translocation |
 79%
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During translocation of sugars in plants from source to sink:

1. The loading of sugar at source is by active transport and unloading at the sink by passive transport.

2. The loading of sugar at source is by passive transport and unloading at the sink by active transport.

3. Both loading at the source and unloading at the sink are by active transport.

4. Both loading at the source and unloading at the sink are by passive transport.

Subtopic:  Phloem Translocation |
 76%
From NCERT
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During plasmolysis:

1. Water is lost from the cytoplasm but not from the vacuole

2. Water is first lost from the cytoplasm and then from the vacuole

3. Water is first lost from the vacuole and then from the cytoplasm 

4. Water is lost from the vacuole but not from the cytoplasm 

Subtopic:  Plasmolysis |
 83%
From NCERT
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Which of the following is/are essential for imbibitions to take place?

I. Water potential gradient between the absorbent and the liquid imbibed

II. Affinity between the adsorbent and the liquid

1. Only II

2. Only I

3. Both I and II

4. None

Subtopic:  Imbibition |
 93%
From NCERT
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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 |
From NCERT
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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:  Pathways of transport |
 88%
From NCERT
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In flowering plants, transport over longer distances proceeds through the vascular system and is called
1. Transportation
2. Translocation
3. Transfusion
4. Transmission

Subtopic:  Introduction |
 96%
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Transport of water and minerals is essentially ……a...from roots to stems. Organic and mineral nutrients however, undergo…b…… transport.

(1) a-Multidirectional

(2) a-Bidirectional

(3) b- Mulltidirectional

(4) b- Unidirectional

Subtopic:  Introduction |
 84%
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Diffusion

Find the wrong option:

(1) Passive

(2) Over shorter distances

(3) No energy expenditure

(4) Movement in ordered fashion

Subtopic:  Means of Transport: Passive |
 93%
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Diffusion

Find the wrong one.

(1) Dependent on a living system

(2) Obvious in gases and liquids

(3) In solids rather than of solids is more likely

(4) Diffusion is very important in plants since it is the only means for gaseous movement within the plant body

Subtopic:  Means of Transport: Passive |
 82%
From NCERT
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