Mass Flow Hypothesis

Q.

Bulk flow is achieved due to a positive hydrostatic pressure gradient in _____and negative hydrostatic pressure gradient in _____ respectively.

1. Xylem and phloem

2. Phloem and xylem

3. Root xylem and leaf xylem

4. Leaf phloem and root phloem

Q. Different substances synthesised in the plant body get transported to their sites of requirement by:

1. Diffusion
2. All of the above
3. Cytoplasmic streaming
4. Active transport and mass flow

Q.

If the concentration of solution inside the cell and outside the cell is same, the movement of water molecules will be in which direction?

1. Outward

2. No movement

3. Both inward and outward

4. Inward

Q.

Which of the following statements are wrong?
(i) Mass flow of substances inside the plant is the result of pressure differences between the two points.
(ii) Diffusion cannot account for long distance movement of water and solutes in plants.
(iii) Movement through apoplast does not involve crossing the cell membrane.

1. (ii)

2. All the statements are correct.

3. (iii)

4. (i)

Q.

Question 5
How is food transported in plants?

Q. What will happen if a concentrated solution of a fertilizer is given to the potted plants?

Q. Transport of sugar in sieve tube occur in the form of

1. monosaccharide
2. Sucrose
3. Glucose
4. Reducing sugar

Q. Assertion :Protons produced by photolysis accumulate in lumen of thylakoids. Reason: Photolysis occurs in the lumen of thylakoids.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Why do plants die when salt is sprinkled over them?

Q. A peeled and half cut potato was scooped to create a cavity in the middle. A salt solution was filled in the cavity and the potato was placed in a Petri dish filled with water.
Which process will occur in the given set-up? Why?

Q. By which of the following techniques, we can prove the phloem as an element for food translocation?

1. Tracer technique
2. Sap analysis technique
3. Chemical analysis
4. All of the above

Q. Mass flow occurs due to difference in pressure across two points.

1. False
2. True

Q.

In the following question, a statement of assertion is followed by a statement of reason. Mark the correct choice as:
Assertion: Translocation of sugar from source (leaf) to sink is defined as pressure flow hypothesis
Reason: Translocation of the solute is facilitated through living phloem sieve tube cells.

1. If both assertion and reason are true and reason is the correct explanation of assertion.

2. If both assertion and reason are true but reason is not the correct explanation of assertion.

3. If assertion is true but reason is false.

4. If both assertion and reason are false.

Q. Why do plants die when salt is sprinkled over them?

Q. Difference between Diffusion pressure and Diffusion pressure deficit(DPD).

Q. The translocation of organic solutes in sieve tube members is supported by:

1. Mass flow involving a carrier and ATP
2. Cytoplasmic streaming
3. Root pressure and transpiration pull
4. P-proteins

Q.

Munch hypothesis is based on

1. Translocation of food due to turgor pressure (TP) gradient

2. Translocation of food due to turgor pressure (TP) gradient and imbibition force

3. Translocation of food due to imbibition force

4. None of the above

Q. What is Mass flow theory?