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NEET • BIOLOGY • TRANSPORT IN PLANTS

Transport in plants practice · Mixed difficulty

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181 Medium

181 of 344

Understanding +4 | -1

Read carefully the following statements and choose the right answer from the options given below
I. Diffusion is a slow process and it do not depends upon the living system
II. Usually process of diffusion does not need energy
III. Diffusion can occur from one part of a cell to another part of the same cell or from one cell to another and from one tissue to another tissue
IV. Diffusion is a rapid process over short distance, but extremely slow over long distances

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Correct option: D

I, II, III and IV

Option D (I, II, III and IV) is correct because all the statements about diffusion are accurate.

182 Hard

182 of 344

Understanding +4 | -1

Assertion (A): The more the solute molecules in a solution, The lower (more negative) is the solute potential of solution.

Reason (R): For a solution at atmoshperic pressure, water potential equal to solute potential.

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Correct option: B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

Option B (Both (A) and (R) are true and (R) is not the correct explanation of (A)) is correct because both the assertion and the reason are true statements, but the reason does not explain the assertion.

183 Easy

183 of 344

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.

184 Medium

184 of 344

Remembering +4 | -1

Movement among cells against concentration gradient is called

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Correct option: B

Active transport

Option B is correct because active transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy.

185 Medium

185 of 344

Remembering +4 | -1

How much percentage of absorbed water in plants is used in the process of photosynthesis?

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Correct option: D

1-2% of absorbed water

Option D (1-2% of absorbed water) is correct because plants use a very small percentage of the water they absorb for photosynthesis, with the majority being lost through transpiration.

186 Medium

186 of 344

Understanding +4 | -1

Study the following statements
I. Most minerals must enter the roots by active absorption into cytoplasm and epidermal cells
II. Ions are absorbed by both passive and active transport
III. Active absorption does not require energy
IV. Active uptake of ions is responsible for osmosis
Choose the correct option in reference to the statements given above

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Correct option: B

I, II and IV are correct and III is incorrect

Option A (I and II are correct and III and IV are incorrect) is correct because minerals enter roots by active absorption, ions are absorbed by both passive and active transport, active absorption requires energy, and active uptake of ions does not directly cause osmosis.

187 Medium

187 of 344

Remembering +4 | -1

Pumps are

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Correct option: D

Proteins

Option D (Proteins) is correct because pumps, which facilitate active transport, are typically made of proteins.

188 Hard

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Understanding +4 | -1

Which is not short distance transport?

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Correct option: C

Phloem transport

Option C (Phloem transport) is correct because phloem transport is a long-distance transport mechanism, while the others are short-distance.

189 Medium

189 of 344

Understanding +4 | -1

During ionic influx, uptake of ions into the inner space is:

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Correct option: A

Slowely and active process

Option A is correct. During ionic influx, the uptake of ions into the inner space is a slow and active process, requiring energy to move ions against their concentration gradient.

190 Easy

190 of 344

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.

191 Easy

191 of 344

Remembering +4 | -1

A special type, which occurs when water is absorbed by solids causing them to increase in volume is called

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Correct option: C

Imbibition

Option C (Imbibition) is correct because imbibition is the process where solids absorb water, causing them to swell without forming a solution.

192 Medium

192 of 344

Remembering +4 | -1

Which one of the following is not an antitranspirant?

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Correct option: B

BAP

Option B is correct. BAP (Benzylaminopurine) is a cytokinin, which promotes cell division and is not an antitranspirant.

193 Hard

193 of 344

Analyzing +4 | -1

Assertion: On the top of the water, oil will form
a film affecting the amount of light entering the
water.

Reason: Oil is a polar molecule, and forms
hydrogen bonds.

View answer and explanation

Correct option: C

If Assertion is true but Reason is false

Option C (If Assertion is true but Reason is false) is correct because oil does form a film on water, but it's due to its non-polar nature, not hydrogen bonding.

194 Medium

194 of 344

Understanding +4 | -1

A student has taken a twig from a plant. She/he observe a droplet of fluid exuding from the cut surface of twig. What is this fluid?

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Correct option: B

Phloem sap

Option B (Phloem sap) is correct because phloem sap contains sugars and nutrients and exudes from cut surfaces of twigs.

195 Hard

195 of 344

Understanding +4 | -1

The value of osmotic potential of an electrolyte is always

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Correct option: A

More than non electrolyte

Option A (More than non electrolyte) is correct because electrolytes dissociate into more particles in solution, leading to a greater osmotic effect.

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ANIMAL KINGDOM 756 MCQs PLANT KINGDOM 415 MCQs ANATOMY OF FLOWERING PLANTS 404 MCQs MOLECULAR BASIS OF INHERITANCE 404 MCQs CHEMICAL COORDINATION AND INTEGRATION 387 MCQs PRINCIPLE OF INHERITANCE AND VARIATION 374 MCQs

196 Medium

196 of 344

Understanding +4 | -1

The epidermal trichomes help in

View answer and explanation

Correct option: C

Protection and reduction of transpiration

Option C (Protection and reduction of transpiration) is correct because epidermal trichomes can protect the plant from herbivores and reduce transpiration by creating a boundary layer of still air near the leaf surface.

197 Easy

197 of 344

Understanding +4 | -1

When pea seeds and wheat grains are soaked in water, pea seeds showed more swelling than the wheat. The reason is

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Correct option: A

Imbibitions capacity of proteins is more than that of starch

Option A (Imbibitions capacity of proteins is more than that of starch) is correct because pea seeds have a higher protein content, and proteins have a greater imbibition capacity compared to starch, which is the main component of wheat grains.

198 Medium

198 of 344

Remembering +4 | -1

In a flowering plant, the substances that
need to be transported is/are

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Correct option: D

All of these

Option D (All of these) is correct because flowering plants need to transport water, minerals, organic nutrients, and plant growth regulators.

199 Medium

199 of 344

Remembering +4 | -1

Bulk flow of water, minerals and organic solutes is due to?

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Correct option: A

Pressure

Option A (Pressure) is correct because bulk flow, or mass flow, of water, minerals, and organic solutes is primarily driven by pressure gradients.

200 Easy

200 of 344

Understanding +4 | -1

Which among the following is NOT by facilitated diffusion?

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Correct option: D

Conduction of water, minerals and organic solutes in xylem and phloem.

Option D (Conduction of water, minerals and organic solutes in xylem and phloem) is correct because this process involves bulk flow, which is different from facilitated diffusion.

201 Medium

201 of 344

Remembering +4 | -1

Which type of soil has least water retaining capacity?

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Correct option: A

Sandy soil

Option A is correct because sandy soil has large particles and large pore spaces, leading to rapid drainage and the least water retention capacity.

202 Medium

202 of 344

Understanding +4 | -1

The real forces responsible for the movement of water from one cell to another cell is mainly

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Correct option: C

Diffusion pressure deficit

Option C (Diffusion pressure deficit) is correct because DPD represents the actual driving force for water movement from one cell to another.

203 Medium

203 of 344

Remembering +4 | -1

The potential energy of water is referred as

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Correct option: A

Water potential

Option A is correct because water potential is defined as the potential energy of water per unit volume, representing its ability to do work.

204 Medium

204 of 344

Remembering +4 | -1

During

{Na}^{+}-{K}^{+}

pump:

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Correct option: A

3 {Na}^{+}

and

2 {K}^{+}

are transported

Option A is correct because the

{Na}^{+}-{K}^{+}

pump actively transports 3

{Na}^{+}

ions out of the cell and 2

{K}^{+}

ions into the cell.

205 Easy

205 of 344

Remembering +4 | -1

The stomata in CAM plants open during

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Correct option: B

Night

Option B (Night) is correct because CAM plants open their stomata at night to fix carbon dioxide, minimizing water loss during the hotter, drier daytime hours.

206 Hard

206 of 344

Application +4 | -1

Two adjacent cells A and B are being studied. Cell A has OP of 10 atm and TP of 6 atm. Cell B has OP of 10 atm occurs from?

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Correct option: A

Cell A to cell B

Option A (Cell A to cell B) is correct because water moves from a region of higher water potential to a region of lower water potential.

207 Medium

207 of 344

Remembering +4 | -1

If two solutions have the same osmoregularity, they are said to be

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Correct option: C

Isotonic

Option C (Isotonic) is correct because isotonic solutions have the same osmolality, meaning they have the same solute concentration and water potential.

208 Medium

208 of 344

Remembering +4 | -1

Which of the following is responsible for the transport of water and minerals from roots to stems, leaves, flowers and fruits in rooted plants?

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Correct option: A

Xylem

Option A (Xylem) is correct because xylem is responsible for transporting water and minerals from the roots to other parts of the plant.

209 Medium

209 of 344

Understanding +4 | -1

In plasmolysed cell, the space between nucleus and plasma membrane is occupied by

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Correct option: B

Hypertonic solution

Option B (Hypertonic solution) is correct because in a plasmolysed cell, the cell membrane shrinks away from the cell wall due to water loss into the hypertonic solution surrounding the cell.

210 Medium

210 of 344

Remembering +4 | -1

Water channels are made up of how many different types of aquaporins?

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Correct option: A

Eight

Option A (Eight) is correct because water channels are made up of eight different types of aquaporins.

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