Question

Companion cells are a specialized type of

• A. Sclerenchyma cells
• B. Lateral meristems
• C. Collenchyma cells
• D. Parenchyma cells

Answer 1

The correct option is D Parenchyma cells

Companion cells are a specialized type of parenchyma cells. The metabolic functioning of sieve-tube members depends on a close association with the companion cells. All of the cellular functions of a sieve-tube element are carried out by the much smaller companion cell. Companion cell usually has a larger number of ribosomes and mitochondria. The cytoplasm of a companion cell is connected to the sieve-tube element by plasmodesmata.

Thus, the correct answer is option D.