Which statement about phloem transport among the following is false?

Sieve tubes in a source leaf have a low hydrostatic pressure

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Water and solutes move through the sieve tube along a pressure gradient

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Sucrose is swept along by the bulk flow of water in sieve tubes

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Root tips, stem tips and fast growing storage organs are considered as sink regions in phloem transport

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Solution

The correct option is A Sieve tubes in a source leaf have a low hydrostatic pressure
Sieve tube in leaf will have very high hydrostatic pressure due to the dissolving of sugar (sucrose) in sap.

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Similar questions

Q. 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.

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.

Q. During phloem transportation sugar is moved in form of sucrose in to the companion cells and them into the living phloem sieve tube cells by -

Q. Arrange the following five events in a correct order that explains the mass flow of materials in the phloem.
1. Water diffuses into the sieve tube elements.
2. Leaf cells produce sugar by photosynthesis.
3. Solutes are actively transported into the sieve elements.
4. Sugar is transported from cell to cell in the leaf.
5. Sugar moves down the stem.

Q. Consider the following statements
(a) Xylem transports water and minerals
(b) Gymnosperms lack sieve tubes and companion cells in phloem
(c) First formed primary xylem is called metaxylem
(d) Phloem fibres (bast fibres) are made of collenchyma
Of these statements

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Which statement about phloem transport among the following is false?

The correct option is A Sieve tubes in a source leaf have a low hydrostatic pressureSieve tube in leaf will have very high hydrostatic pressure due to the dissolving of sugar (sucrose) in sap.

The correct option is A Sieve tubes in a source leaf have a low hydrostatic pressure
Sieve tube in leaf will have very high hydrostatic pressure due to the dissolving of sugar (sucrose) in sap.