Aquaporins
a. are found in all cells.
b. allow water to cross the plasma membrane against its concentration gradient.
c. allow for the active transport of water.
d. allow water to cross the plasma membrane via facilitated diffusion

Aquaporins allow for the active transport of water.

Aquaporins (AQP) are protein membrane that serve as channels for the transportation of water and sometimes small solutes across the membrane. They are usually found in bacteria, plants, and animals.

The main function of Aquaporins is the transportation of water between cells.

Find out more at: link

d. allow water to cross the plasma membrane via facilitated diffusion

Explanation:yeah

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.