AP Biology Unit 2

Quiz
•
Science
•
12th Grade
•
Hard
Standards-aligned
Lisa Thompson
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The LDL receptor is an integral membrane protein that crosses the plasma membrane, with portions of the protein extending both outside and into the interior of the cell. The amino acid side chains (R groups) in the region of the protein that crosses the membrane are most likely
charged
hydrophilic
hydrophobic
carbohydrates
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The hydrophilic regions of a membrane protein are most likely
present only in muscle cells
associated with the fatty acid region of the lipids
either on the surface or inserted into the interior of the membrane
exposed on the surface of the membrane
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Plasma membranes are relatively impermeable to water-soluble molecules because
the membranes are waxy
water molecules are nonpolar
their bilayer is comprised of phospholipids
they have salt crystals embedded within them
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is not one of the functional roles of membrane proteins?
Allowing movement of molecules that otherwise would be excluded by the lipid components of the membrane
Transferring signals from outside the cell to inside the cell
Facilitating the transport of macromolecules across the membrane
Stabilizing the lipid bilayer
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Define 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
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which type of biological macromolecule is the main component of the plasma membrane?
carbohydrate
lipid
protein
nucleic acid
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
This image is an example of a phospholipid. Which part of a phospholipid is HYDROPHOBIC?
the phosphate "head"
the lipid "tails"
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