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NEET 2011
Exam
NEET
Year
2011
Subject
Botany
Chapter
Transport in Plants

NEET 2011 · Botany · Transport in Plants

Function of companion cells is

Function of companion cells is

Options

  1. Aproviding energy to sieve elements for active transport
  2. Bproviding water to phloem
  3. Cloading of sucrose in to sieve elements by passive transport
  4. Dloading of sucrose into sieve elements

Correct answer

D. loading of sucrose into sieve elements

Step-by-step solution

The companion cells are specialised parenchyma cells, which are closely associated with sieve tube elements. The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls. The companion cells help in maintaining the pressure gradient in the sieve tubes. They also function in loading of sucrose into sieve elements actively.
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