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

XI: Chapter 11- Transport in plants Flashcards

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
Q

What is chresard?

A

Water which can be absorbed by plants

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26
Q

What is echard?

A

Water which cannot be absorbed by plants

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27
Q

What is holard?

A

Chresard+echard

28
Q

What is field capacity?

A

The water retained in soil after rain

29
Q

How is water absorbed by root hair?

30
Q

Is apoplast faster or symplast?

31
Q

Mass flow happens through which pathway?

32
Q

Who gave the transpiration pull theory?

A

Dixon and jolly

33
Q

Which instrument is used to measure transpiration?

34
Q

Who said that transpiration is an essential evil?

35
Q

Who said that transpiration is an unavoidable evil?

36
Q

Stomatal transpiration accounts for what percentage of total transpiration?

37
Q

What is cuticular transpiration?

A

Transpiration through the cuticle present on the lamina of the leaf

38
Q

What is syndetochilec stomata?

A

Gaurd cell and subsidiary cell originated from a single cell

39
Q

What is haplochilec stomata?

A

Guard cell and subsidiary cell originated from different cells.

40
Q

Epistomatous stomata (stomata present only on upper surface of leaf) are present in

A

Water lily, lotus

41
Q

Stomata are absent in

A

Vallisneria, potamogeton

42
Q

Where are cellulose microfibrils located in stomatal apparatus?

A

In gaurd cells

43
Q

According to starch sugar interconversion theory, what makes stomata open?

A

Starch converts to sugar and water moves into gaurd cells from subsidiary cells

44
Q

According to proton pump hypothesis, what makes stomata open?

A

Increase in K concentration in gaurd cells

45
Q

WHat makes stomata close according to proton pump hypothesis?

A

Abscissic acid acts on gaurd cells and leads to reversal of the reactions that make stomata open

46
Q

Which light favours the opening of stomata?

A

Blue light followed by red light

47
Q

What is the effect of cytokinins on stomata?

A

Makes stomata open by increasing potassium ion concentration

48
Q

What is stomatal index?

A

The number of stomata per unit area of a leave is defined as stomatal index.

49
Q

What happens to the glucose formed in leaves?

A

It dimerises to form sucrose which is loaded into seive tubes by companion cells.

50
Q

What is the tonicity of phloem?

A

Hypertonic condition

51
Q

Which is the only means of gaseous transport within the plant body?

52
Q

What do inhibitors of carrier proteins react with?

A

Protein side chain

53
Q

What is the water content of a watermelon?

54
Q

Dry matter of herbaceous plants form how much of the fresh weight?

55
Q

Water potential is expressed in which units?

A

Units of pressure (pascals)

56
Q

Do the contents of vacuolar sap contribute to solute potential of the cell?

57
Q

What are the two factors on which osmosis depends?

A

Pressure gradient and concentration gradient

58
Q

What is the condition of a cell (flaccid or turgid) kept in an isotonic solution?

59
Q

What are the requirements for imbibition?

A

Water potential gradient between adsorbant and liquid, affinity between adsorbant and liquid

60
Q

Is symplastic movement against or along a potential gradient?

A

Along the potential gradient

61
Q

What re-establishes the continuous chains of water molecules in the xylem which often break under tension?

A

Root pressure

62
Q

In how many directions can the root endodermis transport ions?

A

In one direction only

63
Q

Where are mineral ions unloaded in a plant?

A

Fine nerve endings

64
Q

How are mineral ions unloaded in a plant?

A

By diffusion

65
Q

Which elements are actively remobilised?

66
Q

Which transport is required to move sucrose from phloem sap into the sink?

A

Active transport

67
Q

How deep is the bark cut out for girdling experiment?

A

Upto the depth of the phloem

Biology NEET (39 decks)

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