Coordinated biology IGCSE 2.2 - Osmosis and diffusion

Boiling potatoes destroys their cell membranes. A peeled, boiled potato strip is placed in a concentrated solution of salts. What takes place?

• Osmosis and the diffusion of the solute

• Osmosis but no diffusion of the solute

• Diffusion of the solute but no osmosis

• Neither diffusion of solute nor osmosis

Tags

NGSS.MS-LS1-5

The diagram shows the cells in the epidermis of a leaf. Which parts are partially permeable?

• P and Q

• Q and R

• R and S

• P and S

Tags

NGSS.MS-LS1-2

The diagram represents two liquids separated by a membrane through which osmosis can occur. What movement of molecules will occur.

• Molecules of the dissolved substance move from left to right

• Molecules of dissolved substance move from right to left

• Overall, water molecules move from left to right

• Overall, water molecules move from right to left

The diagram shows a plant cell before and after being placed in liquid X for 30 minutes, and an animal cell before and after being placed in liquid Y for 30 minutes. What describes liquids X and Y?

• X: Concentrated solution, Y: Concentrated solution

• X: Concentrated solution, Y: Pure water

• X: Pure water, Y: Concentrated solution

• X: Pure water, Y: Pure water

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

Which diagram shows the appearance of a plant cell after it is placed in distilled water.

• A

• B

• C

• D

Tags

NGSS.MS-LS1-2

Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar?

• A

• B

• C

• D

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

The diagram shows a plant cell that has been placed in a concentrated solution for 30 minutes.What identifies X and Y?

• X: cell membrane, Y: air

• X: cell membrane, Y: concentrated solution

• X: cell wall, Y: air

• X: cell wall, Y: concentrated solution

Tags

NGSS.MS-LS1-2

The diagram shows an experiment using a potato. Which shows the result after 24 hours?

• A

• B

• C

• D

The diagram shows a freshly cut potato strip, a strip suspended in liquid X and one suspended in liquid Y. What identifies the liquids?

• X: Concentrated sugar solution, Y: very dilute sugar solution

• X: pure water, Y: dilute sugar solution

• X: Dilute sugar solution, Y: Concentrated sugar solution

• X: pure water, Y: concentrated sugar solution

Tags

NGSS.MS-PS1-2

The diagram shows two solutions that are separated by a partially permeable membrane. In which direction will most water molecules move in relation to their concentration gradient?

• From X to Y against the water potential gradient

• From X to Y down the water potential gradient

• From Y to X against the water potential gradient

• From Y to X down the water potential gradient

Tags

NGSS.HS-LS1-3