Page | 1
Biology 1406 // Exam 2 Questions with
Detailed Verified Answers
Which of the following makes up the bilayer of every cell membrane?
Ans: Phospholipids
Which of the following describes the placement of membrane proteins?
Ans: The nonpolar regions are inserted into the membrane and the polar
regions protrude from its surface.
The lipid bilayer that forms the core of a cell's membranes is composed
primarily of Ans: phospholipids
Which of the following best describes the proteins which are inserted into
the lipid bilayer of the plasma membrane? Ans: Integral proteins
Identify the four main components of all eukaryotic membranes. Ans: -
Lipid bilayer
- Cell surface markers
- Interior protein network
- Transmembrane proteins
Globular proteins are inserted in the lipid bilayer with their ________
segments interacting with the interior of the lipid bilayer, and their
________ segments protruding from the membrane surface. Ans:
nonpolar, polar
, Page | 2
Which of the following describes the structure of the fluid mosaic model
of membranes? Ans: Proteins float in or on a phospholipid bilayer.
Which of the following is not one of the four main components of all
plasma membranes? Ans: Extracellular matrix
Which of a following is the major function of the phospholipid bilayer of a
plasma membrane? Ans: To impose a barrier to permeability.
The membranes of animal cells usually contain significant amounts of a
steroid molecule called Ans: cholesterol
Transmembrane proteins include: Ans: receptors
carriers
channels
Which of the following accurately describes plant cell membranes? Ans:
Plant cell membranes contain sterols but typically have little or no
cholesterol.
Which of the following accurately describe the functions of
transmembrane proteins? Ans: They can transport molecules across the
membrane.
They transmit information into the cell.
Which of the following are examples of how an interior protein network
structurally supports the membrane? Ans: - Intracellular proteins
anchor membrane proteins
- A protein in red blood cells called spectrin links proteins in the plasma
membrane to actin filaments
Which of the following statements are true concerning the substructure of
the plasma membrane? Ans: -The plasma membrane contains areas
with distinct lipid and protein composition.
Biology 1406 // Exam 2 Questions with
Detailed Verified Answers
Which of the following makes up the bilayer of every cell membrane?
Ans: Phospholipids
Which of the following describes the placement of membrane proteins?
Ans: The nonpolar regions are inserted into the membrane and the polar
regions protrude from its surface.
The lipid bilayer that forms the core of a cell's membranes is composed
primarily of Ans: phospholipids
Which of the following best describes the proteins which are inserted into
the lipid bilayer of the plasma membrane? Ans: Integral proteins
Identify the four main components of all eukaryotic membranes. Ans: -
Lipid bilayer
- Cell surface markers
- Interior protein network
- Transmembrane proteins
Globular proteins are inserted in the lipid bilayer with their ________
segments interacting with the interior of the lipid bilayer, and their
________ segments protruding from the membrane surface. Ans:
nonpolar, polar
, Page | 2
Which of the following describes the structure of the fluid mosaic model
of membranes? Ans: Proteins float in or on a phospholipid bilayer.
Which of the following is not one of the four main components of all
plasma membranes? Ans: Extracellular matrix
Which of a following is the major function of the phospholipid bilayer of a
plasma membrane? Ans: To impose a barrier to permeability.
The membranes of animal cells usually contain significant amounts of a
steroid molecule called Ans: cholesterol
Transmembrane proteins include: Ans: receptors
carriers
channels
Which of the following accurately describes plant cell membranes? Ans:
Plant cell membranes contain sterols but typically have little or no
cholesterol.
Which of the following accurately describe the functions of
transmembrane proteins? Ans: They can transport molecules across the
membrane.
They transmit information into the cell.
Which of the following are examples of how an interior protein network
structurally supports the membrane? Ans: - Intracellular proteins
anchor membrane proteins
- A protein in red blood cells called spectrin links proteins in the plasma
membrane to actin filaments
Which of the following statements are true concerning the substructure of
the plasma membrane? Ans: -The plasma membrane contains areas
with distinct lipid and protein composition.
