In antiport,

Transport occurs along the concentration gradient.

$A$ plant with well-washed roots was placed in a beaker of water diluted with red ink. The red colour travelled up the stem and into the leaf veins. Which of the following is the explanation for the uptake of red ink into the roots?

Symport means...

Movement and accumulation of ions across a membrane against their concentration gradient can be explained by

Which of the following is true for both active transport and facilitated diffusion?