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Biology NEET > XI: Chapter 11- Transport in plants > Flashcards

XI: Chapter 11- Transport in plants Flashcards

(67 cards)

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1
Q

Who is the father of plant phisiology?

A

Stephen Hales

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2
Q

Who is the father of India plant phisiology?

A

Jagdish Chandra Bose

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3
Q

What are the water channels in cell membrane made of?

A

Eight different types of aquaporins

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4
Q

Cells swell up after keeping them in which type of solution?

A

Hypotonic solution

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5
Q

What is the osmotic pressure of pure water?

A

Zero

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6
Q

How does osmotic pressure increase with temperature?

A

Osmotic pressure increases with increase in temperature.

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7
Q

How do root hair absorb water from soil?

A

By osmosis

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8
Q

What is turgor pressure?

A

Turgor pressure is the force within the cell that pushes the plasma membrane against the cell wall.

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9
Q

In which cells is turgor pressure not seen?

A

Cell wall less cells- animal cells

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10
Q

What happens to turgor pressure as water enters the cell?

A

Turgor pressure increases

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11
Q

What is also called pressure potential of a cell?

A

Turgor pressure

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12
Q

What is water potential mathematically equal to?

A

Ψ = ΨS + ΨP

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13
Q

What is the relation between solute potential and pressure potential of fully turgid cell?

A

ΨS = ΨP

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14
Q

What is the relation between diffusion deficit pressure, osmotic pressure and turgor pressure?

A

DPD=OP-TP

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15
Q

What is the relation between osmotic pressure and solute potential?

A

ΨS= -OP

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16
Q

What is limiting plasmolysis?

A

Protoplasm of plant cell shrinks after keeping in hypertonic solution.

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17
Q

What is incipient plasmolysis?

A

Vacuole starts contracting, cell is seen shrinking

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18
Q

How many stages does plasmolysis have?

A

Three stages-
Limiting plasmolysis
Incipient plasmolysis
Evident plasmolysis

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19
Q

What is found between cell wall and cell membrane of a plasmolysed cell?

A

Hypertonic solution

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20
Q

‘A’ has high diffusion deficit pressure and ‘B’ has low diffusion deficit pressure. Water will move from?

A

B to A

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21
Q

‘A’ has high diffusion pressure and ‘B’ has low diffusion pressure. Water will move from?

A

A to B

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22
Q

‘A’ has high osmotic pressure and ‘B’ has low osmotic pressure. Water will move from?

A

B to A

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23
Q

‘A’ has high turgor pressure and ‘B’ has low turgor pressure. Water will move from?

A

A to B

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24
Q

Which is the only form of water available to plants

A

Capillary water

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25
What is chresard?
Water which can be absorbed by plants
26
What is echard?
Water which cannot be absorbed by plants
27
What is holard?
Chresard+echard
28
What is field capacity?
The water retained in soil after rain
29
How is water absorbed by root hair?
Passively
30
Is apoplast faster or symplast?
Apoplast
31
Mass flow happens through which pathway?
Apoplast
32
Who gave the transpiration pull theory?
Dixon and jolly
33
Which instrument is used to measure transpiration?
Potometer
34
Who said that transpiration is an essential evil?
Curtis
35
Who said that transpiration is an unavoidable evil?
Steward
36
Stomatal transpiration accounts for what percentage of total transpiration?
90%
37
What is cuticular transpiration?
Transpiration through the cuticle present on the lamina of the leaf
38
What is syndetochilec stomata?
Gaurd cell and subsidiary cell originated from a single cell
39
What is haplochilec stomata?
Guard cell and subsidiary cell originated from different cells.
40
Epistomatous stomata (stomata present only on upper surface of leaf) are present in
Water lily, lotus
41
Stomata are absent in
Vallisneria, potamogeton
42
Where are cellulose microfibrils located in stomatal apparatus?
In gaurd cells
43
According to starch sugar interconversion theory, what makes stomata open?
Starch converts to sugar and water moves into gaurd cells from subsidiary cells
44
According to proton pump hypothesis, what makes stomata open?
Increase in K concentration in gaurd cells
45
WHat makes stomata close according to proton pump hypothesis?
Abscissic acid acts on gaurd cells and leads to reversal of the reactions that make stomata open
46
Which light favours the opening of stomata?
Blue light followed by red light
47
What is the effect of cytokinins on stomata?
Makes stomata open by increasing potassium ion concentration
48
What is stomatal index?
The number of stomata per unit area of a leave is defined as stomatal index.
49
What happens to the glucose formed in leaves?
It dimerises to form sucrose which is loaded into seive tubes by companion cells.
50
What is the tonicity of phloem?
Hypertonic condition
51
Which is the only means of gaseous transport within the plant body?
Diffusion
52
What do inhibitors of carrier proteins react with?
Protein side chain
53
What is the water content of a watermelon?
92%
54
Dry matter of herbaceous plants form how much of the fresh weight?
10 to 15%
55
Water potential is expressed in which units?
Units of pressure (pascals)
56
Do the contents of vacuolar sap contribute to solute potential of the cell?
Yes
57
What are the two factors on which osmosis depends?
Pressure gradient and concentration gradient
58
What is the condition of a cell (flaccid or turgid) kept in an isotonic solution?
Flaccid
59
What are the requirements for imbibition?
Water potential gradient between adsorbant and liquid, affinity between adsorbant and liquid
60
Is symplastic movement against or along a potential gradient?
Along the potential gradient
61
What re-establishes the continuous chains of water molecules in the xylem which often break under tension?
Root pressure
62
In how many directions can the root endodermis transport ions?
In one direction only
63
Where are mineral ions unloaded in a plant?
Fine nerve endings
64
How are mineral ions unloaded in a plant?
By diffusion
65
Which elements are actively remobilised?
P, K, N
66
Which transport is required to move sucrose from phloem sap into the sink?
Active transport
67
How deep is the bark cut out for girdling experiment?
Upto the depth of the phloem

Biology NEET (39 decks)

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