LS1.

Glucose is a large molecule that needs help entering the cell. Which is the most likely pathway glucose will take to enter the cell?

• Glucose will enter the cell through the phospholipid bilayer by diffusion.

• Glucose will pass through protein channels in a process called osmosis.

• Glucose will pass through protein channels in a process called facilitated diffusion.

• Glucose will enter the cell through the phospholipid bilayer by osmosis.

• carrier proteins

• phospholipid bilayer

• phosphorous bilayer

• receptor proteins

• Suspensions J and K because there was a higher concentration of water molecules inside the cells so water diffused out of the cells.

• Suspensions J and K because there was a higher concentration of water molecules outside the cells so water diffused into the cells.

• Suspension L because there was a higher concentration of water molecules inside the cells so water diffused out.

• Suspension M because the concentration was equal so water did not diffuse unlike all of the other suspensions whose cells lost water.

• X and Z

• X and Y

• W and Y

• W and Z

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    Solute concentrations are greater inside the cell than outside the cell

• Solute concentrations are greater outside the cell than inside the cell.

• Solute concentrations are equal on both sides of the cell wall.

• There are no solutes inside the cell.

• by using ATP molecules

• by degrading sodium ions

• by increasing cell size

• by producing potassium ions

A dinoflagellate is a photosynthetic, unicellular organism found in marine environments.

What would be the effect on this organism if it was transferred from its saltwater environment to freshwater?

• The organism would lose salt through active transport.

• The organism would gain water through osmosis.

• The organism would lose water through osmosis.

• The organism would gain salt through diffusion.

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• Molecules are moving with the concentration gradient.

• Molecules are moving against the concentration gradient.

• Molecules are moving by osmosis only.

• Molecules are moving by active transport only.

• Molecules are moving by both osmosis and active transport.

• active transport

• diffusion

• facilitated diffusion

• osmosis