Tag: transport in plants

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Questions Related to transport in plants

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

Periderm includes __________________.

  1. Phelloderm, collenchyrna and cortex

  2. Phellem, cambium and cortex

  3. All the tissues between epidermis and pith

  4. Phellogen, phellem and phelloderm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The periderm is the protective secondary covering that replaces the epidermis in woody plants. It consists of three parts: the phellogen (cork cambium), the phellem (cork), and the phelloderm (secondary cortex).

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

With reference to the water relations of plants, consider the following statements.
a. The mechanical work done by a chemical system during any change at constant temperature is equal to the decrease in its free energy
b. In the case of inhibition, as water continues to move into the imbibing, the water potential of the water in the imbibing becomes less negative
c. Osmotic pressure is directly proportional to the number of solute molecules per solvent.
Which of these statements are correct?

  1. $1$ and $2$
  2. $2$ and $3$
  3. $1$ and $3$
  4. $1, 2$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Multiple choice biology transport in plants diffusion transport in vascular plants types of transport

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

  1. Ubiquinone

  2. Cytochrome C

  3. Carnitine

  4. NAD
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Carnitine is an amino acid derivative responsible for transporting fatty acids into the mitochondria for beta-oxidation, but it is not part of the mitochondrial electron transport chain. Ubiquinone, Cytochrome C, and NAD (or NADH dehydrogenase) are all core components of the electron transport chain.

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

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:

  1. weathering

  2. leaching

  3. erosion

  4. smearing
Reveal answer Fill a bubble to check yourself
B Correct answer
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"

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

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

  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.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Xylem transport is primarily unidirectional (roots to leaves) due to transpiration pull. Phloem transport is bidirectional (source to sink), as sugars can be moved to various parts of the plant depending on metabolic needs.

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

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

  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.
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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

  1. Unindirectional, bidirectional

  2. Bidirectional, bidirectional

  3. Bidirectional, unidirectional

  4. Unindirectional, unidirectional
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Along DPD gradient

  2. By molecular diffusion

  3. By carriers and pumps

  4. Along water potential gradients
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

The direction of water in Cycas leaflets is 

  1. Upward

  2. Downward

  3. Lateral

  4. Both A and B
Reveal answer Fill a bubble to check yourself
C Correct answer
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'