Osmosis

Which of the following is a correct definition of osmosis?

• Osmosis is the movement of solute from an area of high concentration to an area of low concentration.

• Osmosis is the movement of a substance against the concentration gradient.

• Osmosis is the net movement of water molecules through a selectively permeable membrane into a region of high solute concentration.

• Osmosis is the net movement of water molecules through a selectively permeable membrane into a region of low solute concentration.

Osmosis is an example of __________ transport because it __________ energy.

• active; requires

• active; does not require

• passive; requires

• passive; does not require

Which of the following molecules crosses through a semi-permeable membrane during the process of osmosis?

• sodium

• proteins

• glucose

• water

The cell membrane is selectively permeable.

What is the definition of selective permeability?

• The ability of the cell membrane to let all substances pass into and out of the cell

• The movement of substances into and out of the cell without the need for energy

• The ability of the cell membrane to let only selected substances pass into and out of the cell

• The movement of substances into and out of the cell using chemical energy

In this image, which side is hypotonic compared to the other side? (pink dots = water, purple dots = solute)

• A

• B

TRUE OR FALSE? A less concentrated solution is commonly referred to as hypertonic.

• TRUE

• FALSE

TRUE OR FALSE? A more concentrated solution is commonly referred to as hypertonic.

• TRUE

• FALSE

What is a reasonable prediction for this system?

• Water will move across the semi-permeable membrane from side A to side B.

• Water will move across the semi-permeable membrane from side B to side A.

Which structure in a plant cell will keep the cell from bursting when placed in a hypotonic solution?

• cytoplasm

• cell membrane

• cell wall

• chloroplast

Tags

NGSS.MS-LS1-2

A plant cell has a 5% salt concentration. It is placed into a solution containing a 12% salt concentration.

What will happen to the plant cell?

• Water will move out of the plant cell, causing it to shrivel.

• Water will move into the plant cell, causing it to swell and burst.

• Water will move into the plant cell, causing it to shrivel.

• Water will move out of the plant cell, causing it to swell and burst.

Tags

NGSS.HS-LS1-3