Which of the Following Supports the Finding That Sugar Translocation

question 14

Multiple Choice

Which of the following supports the finding that sugar translocation from mesophyll cells into companion cells is an active (energy-requiring) process?

• A) Sucrose occurs in higher concentrations in companion cells than in the mesophyll cells where it is produced.
• B) Movement of water occurs from xylem to phloem and back again.
• C) ATPase proteins are not associated with sucrose transport.
• D) Channel and carrier proteins are abundant in the plasma membranes of the mesophyll cells.

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