You have a container separated into two compartments by a selectively permeable membrane. Compartment A contains a 5% sugar solution, and Compartment B contains a 10% sugar solution. Which direction will the water flow through the membrane, and why?

The question refers to the concept of selective permeability and diffusion in biology. The substance will naturally move from the compartment with higher concentration (compartment A) to the one with lower concentration (compartment B) according to the principle of diffusion, until the concentration in both is equal.

Explanation:

The subject of this question pertains to the concept of selective permeability and diffusion in biology. Specifically, it involves a scenario where a container is divided into two compartments by a selectively permeable membrane. Compartment A has a higher concentration of a substance compared to compartment B, which is similar to a cell's structure where the cell membrane serves as a barrier.

In biology, the cell membrane or plasma membrane is a bilayer of lipids that acts as a barrier and controls the movement of substances in and out of the cell. This is what we mean when we say the membrane is selectively permeable. In this scenario, the 5% solution in compartment A represents a high concentration area, whereas compartment B with 1% solution signifies a lower concentration area.

According to the principle of diffusion, substances tend to move from an area of high concentration to an area of low concentration to achieve equilibrium. In the given scenario, the substance will naturally move from compartment A to B, until the concentration in both compartments is equal. This principle of movement from high concentration to low is also referred to as moving down the concentration gradient.

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