All life forms currently have a basic cell membrane so we hypothesize that the earliest cells also had membranes.It is likely that the primordial environment was acidic.In order for a cell to function in this type of environment,the cell membrane would have to include A)a sodium (Na⁺)pump. B)a proton (H⁺)pump. C)mitochondria underneath in order to provide energy for active transport. D)an acid-proof cell wall. E)a totally nonpermeable membrane.

Question

Quizplus · Accepted Answer

In an acidic environment, a proton (H⁺) pump would be necessary to regulate the internal pH of the cell by actively transporting protons out of the cell.

All Life Forms Currently Have a Basic Cell Membrane So