Question

Sugar molecules are moved into sieve elements through

• A. Passive transport
• B. Active transport
• C. Osmosis
• D. None of the above

Answer 1

The correct option is B Active transport

The sugar molecules are transported by the conducting cells in the phloem tissue in the form of sucrose. These sugar molecules are transported from the source end to the sink end. The source end is the region where the sugar is present in high concentrations. The sugar needs to be moved in the sieve elements in the source end by the process of sieve elements. Energy needs to be spent to move the sugar molecules in the form of ATP. The sugar molecules are transported through osmosis and removed from the sieve cells in the sink end by active transport.

Thus, the correct answer is option B.