If ATP production is blocked, what type of transport would be most affected?

Active transport is highly dependent on ATP production because it involves the movement of substances against their concentration gradient. This process requires energy, which is primarily supplied by ATP. Active transport mechanisms, such as the sodium-potassium pump, utilize ATP to transport ions in and out of cells, maintaining essential concentrations necessary for cellular function.

In contrast, passive transport processes, such as diffusion and facilitated diffusion, do not require energy. These processes involve the movement of molecules down their concentration gradient, meaning they can occur naturally due to differences in concentration without the need for cellular energy. Thus, even if ATP production is blocked, these forms of transport would continue to operate as they rely on the inherent kinetic energy of molecules or the presence of specific channels.

Therefore, if ATP production is disrupted, active transport would be the most affected type of transport due to its energy requirements.