Question

Loading of sucrose into sieve tube cells is by (i)_______ and the unloading of sucrose from the sieve tube cells is by (ii)________.

• A. Active transport and passive transport
• B. Passive transport and active transport
• C. Active transport
• D. Passive transport

Answer 1

The correct option is C

Active transport

Sucrose is loaded into sieve tube cells by active transport. Again active transport is necessary to move sucrose out of sieve tube cells.