AP Biology Topic 4.5

Pure water has a water potential of ___.

• 1
• 0
• -1
• 100

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

• -1.5 . bars

• 7.5 bars

• 3 bars

• -7.5 bars

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

• 4 bars

• 0 bars

• -4 bars

• 2 bars

A cell with a water potential of -1.5 bars is placed in a beakers with a sugar potential of -4 bars. In which direction the net flow of water be?

• Into the cell

• Out of the cell

• There will be no net movement of water

A plant cell with the solute potential of -3 bars and pressure potential of 2 bars is placed into a beaker of pure water (distilled water). Which direction will the net movement of water be?

• Into the cell

• Out of the cell

• There will be no net movement of water.

A plant cell with a solute potential of -3 bars is placed into a beaker of distilled water and is allowed to come equilibrium. What must the pressure potential of the plant cell be?

• 3 bars

• -3 bars

• 0 bars

• 6 bars

A student places a zucchini cube into an open container containing a 0.50M of sucrose solution. The temperature of the solution is kept steady at 25 degrees Celsius. What is the solute potential of the soultion?

• 1.0 bars

• -1.0 bars

• 12 bars

• -12 bars

A student places a potato cube into a beaker of distilled water as shown. The potato cube has a ψp

​ of 7.2 bars and a ψsof -9.8 bars. Which of the following is true?

.

• The potato cells have a water potential of -2.6 bars while the beaker has a water potential of 17.6

• The potato cells have a water potential of 0 while the beaker of water has a water potential of 0.

• The potato cells have a water potential of -2.6 while the beaker of water has a water potential of 0.

• The potato cells have a water potential of 0 while the beaker of water has a water potenial of -2.6.

The solute potential of a plant cell is −12bar and its pressure potential is 3 bar. The cell is placed in a solution with a water potential of -10 bar. What is the water potential and which way will water move.

.

• −9 bar; water will move out of the cell

• −15 bar; water will move into the cell

• −15 bar; water will move out of the cell

• −9 bar; water will move into the cell

Tags

NGSS.HS-LS1-3