Tag: types of transport

Questions Related to types of transport

Which one of the following compounds is NOT a member of the electron transport chain?

biology transport in plants diffusion transport in vascular plants types of transport

  1. Ubiquinone

  2. Cytochrome C

  3. Carnitine

  4. NAD

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Correct Option: A

Choose the correct answer from the alternatives given.
At the time of heavy rain, minerals in upper layers of the soil move downward by a process known as:

biology transport in plants diffusion transport in vascular plants types of transport

  1. weathering

  2. leaching

  3. erosion

  4. smearing

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Correct Option: B
Explanation:

Leaching is draining away from soil, ash, or similar material by the action of percolating liquid, especially rainwater downwards.

So the correct answer is "leaching"

Read the given statements and selected the correct option.
Statement 1: Xylem transport is unidirectional.
Statement 2: Phloem transport is bidirectional.

biology transport in plants diffusion transport in vascular plants types of transport

  1. Both statement 1 and 2 are correct and statement 2 is the correct explanation of statemnet 1

  2. Both statement 1 and 2 are correct and statement 2 is not the correct explanation of statement 1

  3. Statement 1 is correct and statement 2 is incorrect

  4. Both statement 1 and 2 are correct.

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Correct Option: D

The primary difference between the aopolast and the symplast is that the

biology transport in plants diffusion transport in vascular plants types of transport

  1. apoplast is nonliving spaces and cell walls

  2. apoplast relies on active transport

  3. symplast is nonliving spaces and cell walls

  4. apoplast prevents passive diffusion.

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Correct Option: A
Explanation:

Apoplast and symplast are two routes used by plants to transport water from root hair cells to the xylem of the root. Apoplast includes the non-living components of a plant such as cell walls and the intracellular spaces. The main difference between apoplast and symplast is their mechanism of the water movement.

So, the correct option is 'apoplast is non-living spaces and cell walls'.

The movement of water and minerals in xylem and the movement of phloem sap in phloem is ............... and .................... respectively

biology transport in plants diffusion transport in vascular plants types of transport

  1. Unindirectional, bidirectional

  2. Bidirectional, bidirectional

  3. Bidirectional, unidirectional

  4. Unindirectional, unidirectional

Show answer
Correct Option: A
Explanation:

The movement of water and minerals in xylem and the movement of phloem sap in phloem is unidirectional and bidirectional respectively. Plants need water for their growth, and it uptakes water through the roots. Water that is taken by the roots has to reach all the leaves or branches, here the xylem function as transportation of water. Therefore, the movement of water and minerals in xylem is always an unidirectional. Whereas, the movement of phloem is bidirectional this is because, once the food is synthesized it is the phloem that transfers the food to all the parts of plants wherever it is necessary.

So, the correct answer is option A.

Choose the correct answer from the alternatives given.
By what method arc ions absorbed by plants?

biology transport in plants diffusion transport in vascular plants types of transport

  1. Along DPD gradient

  2. By molecular diffusion

  3. By carriers and pumps

  4. Along water potential gradients

Show answer
Correct Option: C
Explanation:

 For plants to take up mineral ions, ions are moved into root hairs, where they are in a higher concentration than in the dilute solutions in the soil. Active transport (pumps) then occurs across the root so that the plant takes in the ions it needs from the soil around it. The root hair cells have carrier molecules on their surface that pick up the minerals and move them into the cell against the concentration gradient.

So, the correct option is, 'By carriers and pumps'.

The direction of water in Cycas leaflets is 

biology transport in plants diffusion transport in vascular plants types of transport

  1. Upward

  2. Downward

  3. Lateral

  4. Both A and B

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Correct Option: C
Explanation:

(A) The upward flow of the water is seen in the roots of the plant.

(B) Downward flow is seen in the bulk transportation from leaf to every other part of the plant.
(C) Lateral flow of water is seen in leaf and roots due to the diffusion patterns.
So. the correct answer is 'Lateral'

Choose the correct answer from the alternatives given.
Minerals are absorbed in:

biology transport in plants diffusion transport in vascular plants types of transport

  1. meristematic zone

  2. root hair zone

  3. elongation zone

  4. root cap zone

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Correct Option: C
Explanation:

Plants absorb their mineral salt supply from the soil through the roots from the zones of elongation and root hair. The minerals are absorbed as ions which are accumulated by the plants against their concentration in the soil.

So, the correct option is, 'Elongation zone'.

Choose the correct answers from the alternatives given.
The energy source that drives the upward flow of water is

biology transport in plants diffusion transport in vascular plants types of transport

  1. Light

  2. Glucose

  3. ATP

  4. Solar heat

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Correct Option: D
Explanation:

Solar heat causes the evaporation of water from the surface of the leaves in form of water vapour through small openings called stomata. This loss is known as transpiration. Due to the loss of water, water stress condition is created that forces the upward movement of water from the soil towards the shoot system. This water is then again distributed to various plant parts.

Hence, the correct answer is 'Solar heat'.