Question

Perforations are not found in cell wall of the following cells

• A. Tracheid
• B. Companion cells
• C. Sieve tube
• D. Vessels

Answer 1

The correct option is B Companion cells

Companion cells are associated with sieve tubes and aid in loading sucrose into the sieve tubes, they maintain osmotic balance and pressure gradient in the sieve tubes for transportation of sucrose from source to sink.

They are associated with the cells of the sieve tube with the help of pasmodesmatal connections and hence, they do not have perforations