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WorksheetsCell Membrane
Total questions: 16
Worksheet time: 12mins
Define cell (plasma) membrane
lipid that helps minimize effects of temperature
only on the outer surface of the plasma membrane and are attached to proteins or lipids; form distinctive cellular markers
flexible boundary of a cell that separates a cell from its surroundings
may extend partway into the plasma membrane, cross the membrane entirely, or be loosely attached to its inside or outside face
Which type of biological macromolecule is the main component of the plasma membrane?
carbohydrate
lipid
protein
nucleic acid
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?
the phosphate "head"
the lipid "tails"
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHILIC?
the phosphate "head"
the lipid "tails"
Where can carbohydrates be found when part of a plasma membrane?
On the outside of the membrane
On the inside of the membrane
Embedded part of the way into the membrane
Embedded the whole way through the membrane
All of the above
Where can PROTEINS be found when part of a plasma membrane?
On the outside of the membrane
On the inside of the membrane
Embedded the whole way through the membrane
All of the above
What is the function of cholesterol in a plasma membrane?
To make the membrane flexible
To control the effect of temperature changes
To attract water molecules
To allow nutrients and other essential molecules into the cell
What is the "big idea" of the fluid mosaic model of plasma membranes?
the plasma membrane creates a specialized FLUID that looks like a MOSAIC.
the plasma membrane is a MOSAIC.
the fluid mosaic model is NOT related to the plasma membrane.
a plasma membrane is a MOSAIC of components that move FREELY and FLUIDLY.
What does "hydrophobic" mean?
water loving, associates with water
water fearing, does not associate with water
a world war II submarine
an example would be solutes like sugar or salt
What does "hydrophilic" mean?
water loving, associates with water
water fearing, does not associate with water
a world war II submarine
an example would be solutes like oil or fat
Which are example is hydrophobic in nature.
Oil
Sugar
Salt
Water
What does "polar" mean?
A molecule is cold
A molecule has areas of positive and negative charge
A molecule of water is made by
covalent bond (share electrons)
ionic bond (one lose one gain)
Water molecule are polar molecule so, in a solution of water, the water molecules attract eachother by
covalent bond
Hydrogen bond, it's a type of Van Der Waals force
ionic bond
Why is it difficult to wash oil from your hands with plain water?
Both substances are polar. Like polarities repel.
Both substances are nonpolar. Like polarities repel.
Water is nonpolar, and oil is polar, so they will not combine.
Water is polar, and oil is nonpolar, so they will not combine.
