Tag: water absorption and ascent of sap in plants

Questions Related to water absorption and ascent of sap in plants

Apoplast is located

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Outside the plasma membrane

  2. In the entire cytosol

  3. inside the plasma membrane

  4. In the plastidial content

Show answer
Correct Option: A
Explanation:

In the Apoplast pathway water cannot enter the protoplasm.

It travels through  the space between the cell wall and cell membrane and intercellular spaces.
So the correct answer is 'Outside the plasma membrane'.

The pathway which water moves through cell wall without crossing any membrane

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. apoplast pathway

  2. symplast pathway

  3. vacuolar pathway

  4. transmembrane pathway

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Correct Option: A

Mark true statement about apoplast pathway.

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Apoplast pathway may be aided by cytoplasmic streaming

  2. Apoplast pathway is continuous throughout the plant without any exception

  3. Apoplast pathway is faster than symplast pathway

  4. In Apoplast pathway mass flow of water occurs through plasmodesmata

Show answer
Correct Option: C
Explanation:

Apoplast is the system of cell walls which is continuous throughout the plant except in some parts like Casparian strips in the roots. Therefore it cannot be aided by cytoplasmic streaming and cannot occur through plasmodesmata. So, the correct answer is 'apoplast pathway is faster than the symplast pathway'

Movement of water through the symplast involves crossing the 

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Intercellular spaces

  2. Cell wall

  3. Cell membrane

  4. More than one option is correct

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Correct Option: C

Two cells A and B are adjacent to each other. The cell A has osmotic pressure 13 atm and turgor pressure 5 atm, while the cell B has osmotic pressure 6 atm and turgor pressure 2 atm. the result will be 

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Movement of water from cell A to B

  2. Movement of water from cell B to A

  3. Equilibrium of water transport between cell A and B

  4. No movement of water at all

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Correct Option: A

Most water flow in root occurs via apoplast as

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Cortical cells are living cells

  2. Cortical cells are loosely arranged

  3. Cortical cells are thin walled

  4. All the above

Show answer
Correct Option: B
Explanation:

Most of the water flow in the roots occurs via Apoplast since the cortical cells are loosely packed, and hence offer no resistance to water movement.

So, the answer is, "Cortical cells are loosely arranged".

Apoplastic movement of water occurs exclusively through the 
(i) Intercellular spaces
(ii) Walls of the cells
(iii) Plasmodesmata
(iv) Cytoplasm

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. i, ii and iv

  2. iii and iv

  3. i and ii

  4. ii and iv

  5. iv

Show answer
Correct Option: C
Explanation:
Apoplast absorption is a type of absorption where the water moves through the cell wall and intercellular spaces between the two cell. Water is absorbed by the root hair from the soil. It passes the epidermis, cortex, endodermis, casparian strip and pericycle and xylem. After reaching the xylem it is pulled up by the transpirational pull. 
So, the correct answer is option C.

Although a gridled (upto bast) tree may survive for sometime, but it will eventually die because _________________.

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Water will not move upward

  2. Water will not move downward

  3. Sugars and other organic solutes will not move downward

  4. Sugars and other organic solutes will not move upward

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Correct Option: A

Following are the differences between apoplast pathway and symplast pathway. Which of the given differences is/are correct?

Apoplast pathway Symplast pathway
(i) It consists of non-living parts of plant body, i.e., cell walls and intercellular spaces. It consists of living parts of plant body, i.e., protoplasts connected by plasmodesmata.
(ii) There is little resistance in the movement of water Some resistance occurs in the movement of water through symplast
(iii) It is slightly slower It is faster
(iv) Metabolic state of root directly affects apoplast pathway Metabolic state of root does not affect symplast pathway
botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. (iii) only

  2. (i) and (iii) only

  3. (iii) and (iv) only

  4. (ii) and (iii) only

Show answer
Correct Option: C
Explanation:

Apoplast pathway is faster while symplast pathway is slightly slower. Metabolic state of root does not affect apoplast pathway while metabolic state of root directly affects symplast pathway.

In which of the following pathways, movement of water occurs from one cell to another cell through plasmodesmata?

botany water absorption and ascent of sap in plants apoplast and symplastic pathway transport of water in plants water transport

  1. Apoplast pathway

  2. Symplast pathway

  3. Vacuolar pathway

  4. Transmembrane pathway

Show answer
Correct Option: B
Explanation:

In symplast pathway, water passes from cell to cell through their protoplasm. It does not enter cell vacuoles. The cytoplasm of the adjacent cells are connected through plasmodesmata. Symplastic movement is aided by cytoplasmic streaming of individual cells.