Which of the Following Statements About Apoplastic Phloem Loading Is

question 32

Multiple Choice

Which of the following statements about apoplastic phloem loading is FALSE?

• A)It is driven by a proton gradient.
• B)It occurs via sucrose-proton symport.
• C)Apoplastic loaders have numerous plasmodesmatal connections.
• D)In some cases, active transport occurs across the plasma membrane of the sieve tube.
• E)In some cases, active transport occurs across the plasma membrane of the companion cell.

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