Final answer:
The direction of single molecule transport is determined by the concentration gradient, with molecules moving from a region of higher concentration to one of lower concentration through passive transport, until dynamic equilibrium is reached. The statement in the question is true.
Step-by-step explanation:
Yes, the direction of single molecule transport indeed depends on the concentration gradient. This principle operates under what's known as passive transport, where molecules move from an area of higher concentration to an area of lower concentration.
Whether the process involves diffusion, osmosis, or facilitated transport, the unifying factor is that movement occurs along the concentration gradient, which does not require energy from the cell. Once the diffusion process reaches a state called dynamic equilibrium, the concentration of the substance is equal throughout the space, and there is no net movement of the molecules. Additionally, the rate at which diffusion occurs can be affected by factors such as the 'steepness' of the concentration gradient and the physical properties of the molecules involved.