Transport in Plants Test

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Transport in Plants Test - 1

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Question 1
1 / -0

When water moves out of the cell and the cell membrane of a plant cell shrinks away from its cell is called

A
Plasmolysis

B
Isotonic

C
Cytoplasmic streaming

D
Plasmodesmata

Solution

Explanation:

Plasmolysis is the process of shrinkage or contraction of the protoplasm of a plant cell as a result of loss of water from the cell.

Plasmolysis is one of the results of osmosis and occurs very rarely in nature, but it happens in some extreme conditions.
Question 2
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The net direction and rate of osmosis depends on

A
Only pressure gradient

B
Pressure gradient and Concentration gradient

C
Only concentration gradient

D
None of the above

Solution

Explanation:

The diffusion of water across a semi-permeable membrane from high concentration of water (or low solute concentration) to low concentration of water (or high solute concentration) is called osmosis.

The net direction and rate of osmosis depends on two factors: concentration gradient and pressure gradient.
Question 3
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Which one will reduce the rate of transpiration?

A
Decrease in light intensity

B
Increase in wind velocity

C
Increase in water uptake

D
Rise in temperature

Solution

Explanation:

Transpiration takes place through stomata. Decrease in light intensity closes the stomata that ultimately results into reduction in rate of transpiration.
Question 4
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The component that is essential to perform all physiological activities of the plant is

A
All of the above

B
Water

C
Temperature

D
Pressure

Solution

Explanation:

Water is essential for all physiological activities of the plant and plays avery important role in all living organisms. It provides the medium in which most substances are dissolved.
Question 5
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Proteins that form huge pores in the membrane of the certain organelles and bacteria are called as

A
Flaccid

B
Enzymes

C
Pressure gradient

D
Porins

Solution

Explanation:

The porinsare proteins that form huge pores in the outer membranes of the plastids, mitochondria and some bacteria allowing molecules up to the size of small proteins to pass through.
Question 6
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Diffusion rate is affected by

A
Soil and water

B
Gradient concentration and pressure

C
Pressure and soil

D
Water and pressure

Solution

Explanation:

Diffusion rates are affected by the gradient of concentration, the permeability of the membrane separating them, temperature and pressure.
Question 7
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The movement of diffusion is

A
none of the above

B
facilitated

C
Passive

D
active

Solution

Explanation:

Movement by diffusionis passive, and may be from one part of the cell tothe other, or from cell to cell, or over short distances, say, from the intercellular spaces of the leaf to the outside.
Question 8
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Some carrier proteins allow diffusion by both molecules cross the membrane in the same direction is

A
Symport

B
Uniport

C
Aquaporins

D
Antiport

Solution

Explanation:

Some carrier or transport proteins allow diffusion only if two types of molecules move together. In a symport, both molecules cross the membrane in the same direction.
Question 9
1 / -0

Root hairs absorb water from soil with the help of

A
Root pressure

B
Suction pressure

C
Turger pressure

D
Osmatic pressure

Solution

Explanation:

Root hairs absorb water from soil with the help of suction pressure created due to concentration difference of water and mineral ions present in soil.
Question 10
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Transport of water and mineral in plants take place through

A
Xylem tissues

B
Parenchyma

C
Phloem tissues

D
Collenchymas tissues

Solution

Explanation:

Transport of water and mineral in plant take place through xylem tissue present in vascular bundles. Vessels and tracheids are main water conducting elements of xylem.

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Re-Attempt Weekly Quiz Competition

Transport in Plants Test - 1

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Transport in Plants Test - 1

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SHARING IS CARING

Question 1

Plasmolysis

Isotonic

Cytoplasmic streaming

Plasmodesmata

Solution

Question 2

Only pressure gradient

Pressure gradient and Concentration gradient

Only concentration gradient

None of the above

Solution

Question 3

Decrease in light intensity

Increase in wind velocity

Increase in water uptake

Rise in temperature

Solution

Question 4

All of the above

Water

Temperature

Pressure

Solution

Question 5

Flaccid

Enzymes

Pressure gradient

Porins

Solution

Question 6

Soil and water

Gradient concentration and pressure

Pressure and soil

Water and pressure

Solution

Question 7

none of the above

facilitated

Passive

active

Solution

Question 8

Symport

Uniport

Aquaporins

Antiport

Solution

Question 9

Root pressure

Suction pressure

Turger pressure

Osmatic pressure

Solution

Question 10

Xylem tissues

Parenchyma

Phloem tissues

Collenchymas tissues

Solution

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