What mechanisms do plants use to load sucrose produced by photosynthesis into specialized cells in the veins of leaves?
A)an electrogenic pump
B)a proton pump
C)a contransport protein
D)A and C only
E)A, B, and C

Question

Quizplus · Accepted Answer

Plants use a combination of an electrogenic pump, a proton pump, and a cotransport protein to load sucrose into the phloem. The proton pump creates a proton gradient, which is then used by the cotransport protein to move sucrose into the phloem cells.

What Mechanisms Do Plants Use to Load Sucrose Produced by Photosynthesis