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Micronutrients

Sucrose enter...

Question

Sucrose enters a phloem sieve-tube cell because of

A

osmosis.

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B

water potential

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C

active transport

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D

a process regulated by auxin.

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Solution

The correct option is C
active transport

This is also called as vein loading.

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Similar questions

Sucrose enters a phloem sieve-tube cell because of:

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 -

What is the name of the process whereby sugar enters sieve tubes by means of active transport?

Q. Assertion: Translocation of sucrose through phloem is a passive process.

Reason: Sucrose is pumped from leaves to sieve tubes at the expense of ATP.

Q. Find the correct pair of statements :
(i) The influx of Cl into guard cells during stomatal opening is active.
(ii) Entry of sucrose from companion cells into sieve tubes at source involves the expenditure of energy.
(iii) At the sinks, sucrose moves out of phloem by passive transport.
(iv) Efflux of K

^{+}

from guard cells during stomatal closure does not involve energy expenditure.

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