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- 1. Multiple Choice
Define cell (plasma) membrane
a solid, rigid boundary that surrounds a cell
the outer surface of a membrane that doesn't allow any substances to move into a cell
flexible boundary of a cell that separates a cell from its surroundings
a protective layer around the cell that provides strength
- 2. Multiple Choice
Which types of molecule are the main component of the cell (plasma) membrane?
carbohydrate and proteins
lipids and proteins
lipids and carbohydrates
DNA and proteins
- 3. Multiple Choice
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?
the phosphate "head"
the lipid "tails"
- 4. Multiple Choice
This image is an example of a phospholipid. Which part of a phospholipid would face the watery environment, either inside or outside a cell?
the phosphate "head"
the lipid "tails"
- 5. Multiple Choice
Which of the following is not a main role of the cell membrane?
providing strength for the cell
cell recognition
allowing cells to communicate with each other
controlling the movement of substance sin and out of a cell
- 6. Multiple Choice
Where can PROTEINS be found when part of a plasma membrane?
Embedded on the outside of the membrane
Embedded on the inside of the membrane
Embedded the whole way through the membrane
All the above
- 7. Multiple Choice
What is the "big idea" of the fluid mosaic model of cell (plasma) membranes?
the plasma membrane creates a specialized FLUID that looks like a MOSAIC.
the plasma membrane is a MOSAIC of different fluids.
the fluid mosaic model is NOT related to the plasma membrane.
a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.
- 8. Multiple Choice
What does "hydrophilic" mean?
water loving, associates with water
water fearing, does not associate with water
water loving and fearing
attracted to fats and oils
- 9. Multiple Choice
The width of a cell (plasma) membrane is most appropriately measured in what sort of units?
nanometres
millimetres
centimetres
metres
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