Question

Show also the selenate anion (SeO₄^2- ) could be accumulated by a root cell using a symport, and how the Mn²⁺ ion would be exported from the cell using an antiport by drawing diagrams of both.     

Answer 1

Selenate ions are rapidly absorbed and transported in plant xylem sap. ... Soil and plant management in seleniferous areas must take into account soil types and the genetic tolerance by plants of high selenium and salt concentrations. It absorbed by symport way with the phosphate ions.

Manganese (Mn) is an important micronutrient for plant growth and development and sustains metabolic roles within different plant cell compartments. The metal is an essential cofactor for the oxygen-evolving complex (OEC) of the photosynthetic machinery, catalyzing the water-splitting reaction in photosystem II (PSII). Mn toxicity occurs on poorly drained and acidic soils in which high amounts of Mn are rendered available. Consequently, plants have evolved mechanisms to tightly regulate Mn uptake, trafficking, and storage. Manganese (Mn) export from plant cell through the Ca2+/Cation Antiporter

Uniporters, symporters, and antiporters are proteins that are used in ​transport​ of substances across a cell membrane. ... Symporters and antiporters are involved in active transport. Antiporters transport molecules in opposite directions, while symporters transport molecules in the same direction.