How many properties are associated with active transport?

a. Requires special membrane proteins

b. Highly selective in nature

c. Transport saturates

d. Requires ATP as source of energy

e. Responds to protein inhibitors

 

1. a, b, c, d only

2. b, c, d, e only

3. a, c, d, e only

4. All a, b, c, d, e

Subtopic:  Means of Transport: Active |
 87%
From NCERT
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Select the incorrect about apoplast pathway.

1. It is faster than symplast

2. Little resistance in the movement of water

3. Consists of living parts of the plant body

4. Water moves through cell walls and intercellular spaces

Subtopic:  Water Absorption |
 73%
From NCERT
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A cell is placed in 0.4 M solution of sugar and no change in volume of cell is found. What is the concentration of the cell sap?

1. 40 M

2. 4 M

3. 0.4 M

4. 0.20 M

Subtopic:  Plant Water Relations: Plasmolysis |
 93%
From NCERT
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In mycorrhiza, fungal filaments help in 

1. Water absorption

2. Food translocation

3. Developing tension in xylem

4. Development of root pressure

Subtopic:  Water Absorption |
 84%
From NCERT
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The process responsible for facilitating loss of water in liquid form from the tip of grass blades at night and early morning is:

1. Root pressure

2. Imbibition

3. Plasmolysis

4. Transpiration

Subtopic:  Transpiration & Guttation |
 71%
From NCERT
NEET - 2020
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Main factor deciding rate of diffusion is :-

1. Pressure/concentration gradient

2. Solubility of gases

3. Thickness of diffusion membrane

4. Posture of body 

Subtopic:  Diffusion |
 78%
From NCERT
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ln above diagram A is having :-

(1) Hypotonic solution 

(2) Hypertonic solution 

(3) Low ψw

(4) Both B & C correct

 

 

 

Subtopic:  Plant Water Relations: Plasmolysis |
 59%
From NCERT
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Movement of water and mineral in cell wall & intercellular space is called as:-

1. Symport 

2. Antiport

3. Symplast

4. Apoplast

Subtopic:  Pathways of transport |
 78%
From NCERT
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Which is not correct with transporting the food through phloem?

1. Loading is a passive process

2. Translocation is due to hydrostatic force

3. Food translocation is bidirectional

4. Translocation always occur from source to sink 

Subtopic:  Phloem Translocation: Short Distance Transport |
 75%
From NCERT
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Which protein is responsible for active transport:-

1. Pump

2. Channel

3. Symport

4. Uniport

Subtopic:  Means of Transport: Active |
 85%
From NCERT
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