Osmolarity refers to the concentration of solutes within a solution.

Osmolarity refers to the concentration of solutes within a solution.

• A. The rate of metabolic activity
• B. The temperature of the environment
• C. The concentration of solutes within a solution
• D. The genetic content of the cell

Answer: (C)

Osmolarity is a measure of how many solute particles are in a given volume of solution. This concentration of solutes determines the osmotic pressure the solution can exert and, in turn, how water will move across a semipermeable membrane during osmosis. In labs and biology, this concept helps predict whether cells will swell or shrink when placed in different solutions. The other ideas describe different phenomena: metabolic activity rate relates to how fast cellular processes occur; temperature affects kinetic energy and reaction rates; genetic content refers to the cell’s DNA. None of these describe the amount of solute particles in a solution, which is what osmolarity specifically measures.

Osmolarity is a measure of how many solute particles are in a given volume of solution. This concentration of solutes determines the osmotic pressure the solution can exert and, in turn, how water will move across a semipermeable membrane during osmosis. In labs and biology, this concept helps predict whether cells will swell or shrink when placed in different solutions.

The other ideas describe different phenomena: metabolic activity rate relates to how fast cellular processes occur; temperature affects kinetic energy and reaction rates; genetic content refers to the cell’s DNA. None of these describe the amount of solute particles in a solution, which is what osmolarity specifically measures.