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NEET • BIOLOGY • TRANSPORT IN PLANTS

Transport in plants practice · Easy

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31 Easy

31 of 102

Understanding +4 | -1

With the increase in temperature, the process of imbibition

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Correct option: B

Increases

Option B (Increases) is correct because an increase in temperature generally increases the rate of imbibition due to increased kinetic energy of water molecules and enhanced diffusion.

32 Easy

32 of 102

Understanding +4 | -1

The first process responsible for the entry of water into a seed, when it is placed in a suitable environment for germination is

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Correct option: B

Imbibition

Option B (Imbibition) is correct because imbibition is the initial process by which dry seeds absorb water from their surroundings, leading to germination.

33 Easy

33 of 102

Understanding +4 | -1

When a cell is fully turgid

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Correct option: C

water potential is zero

Option C (water potential is zero) is correct because at full turgor, the pressure potential equals the osmotic potential, making the water potential zero.

34 Easy

34 of 102

Understanding +4 | -1

Which of the following feature is not related to facilitated diffusion?

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Correct option: C

Require the energy in the form of ATP

Option C (Require the energy in the form of ATP) is correct because facilitated diffusion is a passive process and does not require ATP.

35 Easy

35 of 102

Remembering +4 | -1

Root hair absorbs water from soil through

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Correct option: B

Osmosis

Option B (Osmosis) is correct because root hairs absorb water from the soil due to the difference in water potential between the soil and the root cells.

36 Easy

36 of 102

Understanding +4 | -1

When pea seeds and wheat seeds are put in water, which of the two will imbibe more water?

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Correct option: B

Pea seeds

Option B (Pea seeds) is correct because pea seeds generally have a higher protein content compared to wheat seeds, and proteins have a greater imbibition capacity than starches.

37 Easy

37 of 102

Understanding +4 | -1

If two types of seeds, like pea and maize are kept in water at the same time. Which among the two will imbibe more water?

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Correct option: B

Pea seed

Option B (Pea seed) is correct because pea seeds contain more protein compared to maize seeds, and proteins have a higher imbibition capacity than starches.

38 Easy

38 of 102

Remembering +4 | -1

Mechanism of opening and closing of stomata is controlled by

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Correct option: A

Guard cells

Option A (Guard cells) is correct because guard cells regulate the opening and closing of stomata by changing their turgor pressure.

39 Easy

39 of 102

Remembering +4 | -1

Which of the following is the most accepted theory for movement of water through plants?

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Correct option: A

Cohension theory

Option A (Cohension theory) is correct because the cohesion-tension theory is the most widely accepted explanation for water movement in plants.

40 Easy

40 of 102

Understanding +4 | -1

What is mandatory in the process of facilitated diffusion?

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Correct option: D

All of the above

Option D (All of the above) is correct because facilitated diffusion requires a concentration gradient, a carrier protein, and a hydrophilic moiety for interaction with the protein.

41 Easy

41 of 102

Understanding +4 | -1

Cell 'A' has

\psi = - \,0.3

Mpa cell 'B' has

\psi = - \,0.2

Mpa and cell ‘C’ has

\psi = - \,0.7

Mpa. Then water
diffuses from

View answer and explanation

Correct option: C

B to A to C

Option C (B to A to C) is correct because water diffuses from a region of higher water potential (less negative) to a region of lower water potential (more negative). B (-0.2) > A (-0.3) > C (-0.7).

42 Easy

42 of 102

Understanding +4 | -1

Osmotic pressure of a solution is

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Correct option: A

Greater than pure solvent

Option A (Greater than pure solvent) is correct because the presence of solute particles increases the osmotic pressure of a solution.

43 Easy

43 of 102

Remembering +4 | -1

Who coined the term diffusion pressure deficit?

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Correct option: C

Meyer

Option C (Meyer) is correct because Meyer coined the term diffusion pressure deficit (DPD), now known as water potential.

44 Easy

44 of 102

Remembering +4 | -1

What is the value of DPD?

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Correct option: C

DPD = OP – WP

Option C (DPD = OP – WP) is correct because DPD (Diffusion Pressure Deficit) is defined as the difference between Osmotic Pressure (OP) and Wall Pressure (WP) or Turgor Pressure (TP).

45 Easy

45 of 102

Remembering +4 | -1

Which one of the following is not a part of symplast?

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Correct option: A

Cell wall

Option A (Cell wall) is correct because the cell wall is not part of the symplast, which includes the cytoplasm, plasma membrane, and plasmodesmata.

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46 Easy

46 of 102

Understanding +4 | -1

Read the following statements regarding porins and select the correct option given below
I. Porins are transport proteins
II. Channel proteins are a type of transport protein, which are usually gated
III. Carrier protein binds the particular solute to be transported
IV. Particular solute is delivered to the other side of the membrane by carrier proteins

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Correct option: C

I, II, III and IV

Option C (I, II, III and IV) is correct because all the statements accurately describe porins, channel proteins, and carrier proteins.

47 Easy

47 of 102

Understanding +4 | -1

Choose the correct statement regarding casparian strips
I. It surrounds pericycle
II. It is made up of legnosuberin
III. It limits the pathway available to water solutes, forcing them to enter the symplast

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Correct option: B

I, II and III

Option B (I, II and III) is correct because casparian strips surround the pericycle, are made of legnosuberin, and force water and solutes to enter the symplast.

48 Easy

48 of 102

Understanding +4 | -1

The transport of organic and inorganic substances in plants over longer distance occurs through vascular tissue by the means of

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Correct option: D

Mass flow

Option D (Mass flow) is correct because the long-distance transport of substances in plants through vascular tissues (xylem and phloem) occurs via mass flow, driven by pressure gradients.

49 Easy

49 of 102

Remembering +4 | -1

Which theory is considered best to explain ascent of sap

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Correct option: B

Transpiration pull

Option B (Transpiration pull) is correct because transpiration pull is the main driving force for the ascent of sap in plants.

50 Easy

50 of 102

Remembering +4 | -1

Who described mass flow hypothesis?

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Correct option: A

Munch

Option A is correct because Munch described the mass flow hypothesis, which explains the translocation of sugars in plants.

51 Easy

51 of 102

Understanding +4 | -1

Two chambers are separated by selectively permeable membrane. If one chamber (X) has of

{\psi _w}

of -2000 kPa and the other (Y) has

{\psi _w}

-1000 kPa. The direction of the movement of water will be

View answer and explanation

Correct option: C

From the chamber with -1000 kPa

{\psi _w}

to -2000 kPa

{\psi _w}

The correct answer is C. Water moves from an area of higher water potential (less negative) to an area of lower water potential (more negative).

52 Easy

52 of 102

Understanding +4 | -1

If water enters in a cell, the pressure exerted by its swollen protoplast is

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Correct option: A

Turgor pressure

Option A (Turgor pressure) is correct because turgor pressure is the pressure exerted by the cell's contents against the cell wall when water enters the cell.

53 Easy

53 of 102

Understanding +4 | -1

Addition of more solutes in a given solution will:

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Correct option: C

lower its water potential

Option C (lower its water potential) is correct because adding solutes to a solution decreases its water potential, making it more negative.

54 Easy

54 of 102

Remembering +4 | -1

Mass flow hypothesis was first described by?

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Correct option: D

Munch

Option D is correct because Munch first described the mass flow hypothesis, which explains the translocation of sugars in plants.

55 Easy

55 of 102

Remembering +4 | -1

Transport of minerals through xylem is

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Correct option: A

Active and energy is provided by ATP

Option A (Active and energy is provided by ATP) is correct because mineral transport through xylem requires energy for loading at the source.

56 Easy

56 of 102

Understanding +4 | -1

After heavy rain fall with poor drainage, laves of many plants wilt due to

View answer and explanation

Correct option: B

Poor aeration

Option B (Poor aeration) is correct because heavy rainfall with poor drainage leads to waterlogged soil, reducing oxygen availability to the roots, causing them to wilt.

57 Easy

57 of 102

Remembering +4 | -1

Which type of transpiration continues throughout day and night?

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Correct option: D

All of these

Option D (All of these) is correct because cuticular, lenticular, and bark transpiration all occur continuously, though at different rates.

58 Easy

58 of 102

Understanding +4 | -1

Choose the incorrect statement w.r.t. translocation of mineral ions.

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Correct option: C

Exchange of materials does not take place between xylem and phloem

Option C (Exchange of materials does not take place between xylem and phloem) is correct because, in reality, there is indeed exchange of materials between xylem and phloem to facilitate nutrient distribution and maintain plant homeostasis.

59 Easy

59 of 102

Remembering +4 | -1

Cohension and adhension theory, is otherwise called

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Correct option: D

Transpiration pull theory

Option D (Transpiration pull theory) is correct because the cohesion-adhesion theory is also known as the transpiration pull theory.

60 Easy

60 of 102

Remembering +4 | -1

The ________ is freely permeable to water and substances in solution hence is not a barrier to movement.

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Correct option: B

Cell wall

Option B is correct because the cell wall is freely permeable to water and solutes, offering no barrier to movement.

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