What type of molecule are cell membranes made from?

• Protein

• Phospholipid

• Carbohydrate

• Nucleic Acids

Selective permeability means ...

• Allows all materials to cross

• Allows some materials to cross

• Allows nothing to cross

Moving molecules across membranes using energy is called ...

• Diffusion

• Active transport

• passive transport

• osmosis

Molecules can move __________ their concentration gradient by using energy.

• Down

• Against

If a student microwaves their dinner in the back of the classroom, the smell will ...

• diffuse from low concentration to high concentration.

• spread to the back of the room last.

• diffuse from high concentration to low concentration.

• spread to the front of the room first.

Tags

NGSS.MS-ESS2-5

A _______________ solution has a high concentration of solutes dissolved in a solvent.

• hypotonic

• hypertonic

• isotonic

• osmotic

Water diffusing across a membrane is called ...

• osmosis

• active transport

• passive transport

• permeability

Strawberries with sugar on them will get wet. Water from inside the plant cells moves outside the plant cells because ...

• the cytoplasm is more concentrated than the sugar.

• the cytoplasm is the same concentration than the sugar.

• the cytoplasm is less concentrated than the sugar.

Red blood cells placed in pure water will ...

• have water flow in until they burst.

• have water flow out and shrink.

• do nothing.

Tags

NGSS.HS-LS1-3

Facilitated diffusion is the movement of molecules across a membrane through a ...

• transport carbohydrate

• transport lipid

• transport protein