AP Biology Water Potential Problems

Front

What is the water potential of pure water?

Back

0

Front

What is the formula for calculating water potential?

Back

Water Potential (ψ) = Pressure Potential (ψp) + Solute Potential (ψs)

Front

If a potato cube has a pressure potential of 7.2 bars and a solute potential of -9.8 bars, what is its water potential?

Back

-2.6 bars

Front

What does a negative water potential indicate about a solution?

Back

It indicates that the solution has a lower potential for water movement compared to pure water.

Front

How do you calculate solute potential?

Back

Solute Potential (ψs) = -iCRT, where i = ionization constant, C = molar concentration, R = pressure constant (0.0831 liter bar per mole per K), and T = temperature in Kelvin.

Front

If a cell has a pressure potential of 3 bars and a solute potential of -4.5 bars, what is the water potential?

Back

-1.5 bars

Front

What is the significance of pressure potential in plant cells?

Back

Pressure potential contributes to turgor pressure, which helps maintain cell structure and rigidity.

Front

If a plant cell has a water potential of -2 bars and a pressure potential of 2 bars, what is its solute potential?

Back

-4 bars

Front

What happens to water movement when a cell's water potential is higher than that of its surrounding solution?

Back

Water will move out of the cell.

Front

What is the direction of water flow when a cell with a water potential of -1.5 bars is placed in a solution with a water potential of -4 bars?

Back

Water will flow out of the cell.