Water potential

Water potential

Assessment

Assessment

Penny Dunning

Science

11th - 12th Grade

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15 questions

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1.

Multiple Choice

30 sec

1 pt

If a cells  Ψp\Psi p = 3 bars and its  Ψs\Psi s = -4.5 bars, what is the resulting  Ψ\Psi  ?

-7.5

7.5

-1.5

1.5

2.

Multiple Choice

30 sec

1 pt

A cell with a water potential of -1.5 bars is placed in a beaker of sugar water with Ψs\Psi s  = -4.0 bars.  In which direction will the net flow of water be?

Out of the cell

Into the cell

Both into and out of the cell

Neither into nor out of the cell

3.

Multiple Choice

30 sec

1 pt

A cell with a water potential of -1.5 bars is placed in a beaker of sugar water with  Ψs\Psi s  = 1.5 bars.  In which direction will the net flow of water be?

Into the cell

Out of the cell

No net flow of water

4.

Multiple Choice

1 min

1 pt

The value for  Ψ\Psi  in root tissue was found to be -3.3 bars.  If you take the root tissue and place it in a 0.1 M solution of sucrose at 20 °\degree C in an open beaker, what is the  Ψ\Psi  of the solution, and in which direction would the net flow of water be?

 Ψs\Psi s  = -3.3, net flow into the root

 Ψs\Psi s  = 3.3, net flow out of the root (into the solution)

 Ψs\Psi s  = -2.43, net flow into the root

 Ψs\Psi s  = 2.43, net flow out of the root (into the solution)

5.

Multiple Choice

1 min

1 pt

NaCl dissociates into 2 particles in water: Na+ and Cl-. If a solution in an open beaker contained 0.1M NaCl at 20 \degree C, what is the  Ψ\Psi  of the solution, and in which direction would the net flow of water be?

-3.3 bars, net flow out of the root (into the solution)

3.3 bars, net flow into the root

-4.87 bars, net flow out of the root (into the solution)

4.87 bars, net flow into the root

6.

Multiple Choice

1 min

1 pt

A plant cell with a Ψs\Psi s  of -7.5 bars keeps a constant volume when immersed in an open-beaker solution that has a  Ψs\Psi s  of -4 bars.  What is the cells  Ψp\Psi p  ?

-4

-7.5

-3.5

3.5

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