Question

The cell membrane controls the traffic of molecules into and out of the cell, prevents the entry of toxic material into the cell and permits selective uptake of nutrients. Which property of the membrane can this be attributed to?

Answer 1

Semi-permeable nature of the membrane

Answer 2

Which of the following events is a part of the Light reaction of photosynthesis?

Answer 3

Inside the thylakoid space becomes acidic, the pH goes down. The photolysis light reaction frees protons that are pumped across into the space.

The stroma outside the thylakoid can be pH 8, it increases. This is the proton gradient that drives the synthesis of ATP.