AP Bio Water Potential

Pure water has a water potential of ___.

• 1
• 0
• -1
• 100

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Identify the approximate concentration of sucrose in the potato cells.

• 0.13 M
• 0.0 M
• 0.4 M
• 0.33 M

Tags

NGSS.HS-LS2-4

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Which molecule caused the change in mass?

• water
• sucrose
• salt
• glucose

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Calculate the water potential for the carrot cells.  The ionization constant for sucrose is 1.0 M.  The pressure potential is 0.

• -8.1 bars
• -8.1 M
• 8.1 bars
• -3.5 bars

Tags

NGSS.HS-LS2-4

A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What will be the direction for the net movement of water?

• into the cell
• out of the cell
• there will be no net movement

What is the approximate sucrose concentration in the potato core?

• .43 M
• .30 M
• 0.0 M
• 1.0 M

Tags

NGSS.HS-PS1-5

If salt cannot permeate the membrane, which cell will lose the most water?

• A
• B
• C

Tags

NGSS.HS-LS1-3

If salt cannot permeate the membrane, which cell will gain the most water?

• A
• B
• C

Tags

NGSS.HS-LS1-3

1.  If the water potential of a cell is higher than the surrounding solution.  The water will ____.

• Move into the cell.
• Move equally in and out of the cell.
• Move out of the cell.

The passive transport of an ion through a protein carrier into a cell represents which of the following?

• (A) facilitated diffusion

• (B) osmosis

• (C) exocytosis

• (D) phagocytosis

• (E) active transport