Cell Membrane and Osmosis - Unit 4

What is the main component of the cell membrane?

• carbohydrates

• phospholipids

• proteins

• cholesterol

What part of the phospholipid is hydrophobic?

• the phosphate head

• the fatty acid tails

• both the head and the tails

• neither the head nor the tails

What part of the phospholipid is hydrophilic?

• the phosphate head

• the fatty acid tails

• both the head and the tails

• neither the head nor the tails

What are 3 characteristics of the cell membrane? Check all that apply

• fluid

• solid

• self-sealing

• flexible

• rigid

What is the function of the cell membrane?

• store genetic information

• hold the cell together

• generate ATP

• maintain homeostasis

Tags

NGSS.MS-LS1-2

Which of the following is true of osmosis?

• Osmosis moves against the water concentration gradient.

• Osmosis is the movement of oxygen across a membrane.

• Osmosis moves water down the concentration gradient.

• Osmosis requires the use of the energy molecule ATP.

The model below represents a plant cell that was tested in different solutions. Based on the model, what type of solution was the cell put in during test A?

• hypotonic

• hypertonic

• isotonic

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-5

A student put a sample of red blood cells in a container filled with an unknown solution. Once in the container, the student noticed that the cells swelled and some of them burst. What type of solution were the red blood cells placed in?

• isotonic

• hypotonic

• hypertonic

Which of the following molecules moves down the concentration gradient during osmosis?

• protein

• sodium

• water

• glucose

The U-shaped tube shown below contains a solution of sugar and water. The green circles represent sugar molecules dissolved in the water. The red line is a semi-permeable membrane that is only permeable to water.

How will water move in this tube?

• The water levels are already equal so water will not flow through the semipermeable membrane.

• Water will flow from side A into side B.

• Water will flow from side B into side A.

• The water is already equal, so the sugar will move from side A to side B.

Tags

NGSS.MS-ESS2-4