NEET BIOLOGY

Detailed explanation-1: -Solution : Companion cells are connected with sieve tubes with plasmodesmata. The supply sieve tubes ATP, nutrients and proteins.

Detailed explanation-2: -Companion cells provide sieve tube members with proteins necessary for signaling and ATP in order to help them transfer molecules between different parts of the plant. It is the companion cells that helps transport carbohydrates from outside the cells into the sieve tube elements.

Detailed explanation-3: -ATP is used in companion cells to provide the energy for loading a sieve tube element with sucrose.

Detailed explanation-4: -Sieve tubes are a component of the phloem in plants. They function as the vessle that transports organic food and other material across the plant.

Detailed explanation-5: -Function of companion cell is to load sugar and amino acids into sieve elements. These cells use transmembrane proteins to take up these molecules by active transport.