Chapter 1 Test Biology
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Biology, 8e (Campbell)
Chapter 7
Membrane Structure and Function
Multiple-Choice Questions
1) Who was/were the first to propose that cell membranes are phospholipid bilayers?
A) H. Davson and J. Danielli
B) I. Langmuir
C) C. Overton
D) S. Singer and G. Nicolson
E) E. Gorter and F. Grendel
2) Who proposed that membranes are a phospholipid bilayer between two layers of hydrophilic proteins?
A) H. Davson and J. Danielli
B) I. Langmuir
C) C. Overton
D) S. Singer and G. Nicolson
E) E. Gorter and F. Grendel
3) Who proposed that the membrane is a mosaic of protein molecules bobbing in a fluid bilayer of phospholipids?
A) H. Davson and J. Danielli
B) I. Langmuir
C) C. Overton
D) S. Singer and G. Nicolson
E) E. Gorter and F. Grendel
4) Which of the following types of molecules are the major structural components of the cell membrane?
A) phospholipids and cellulose
B) nucleic acids and proteins
C) phospholipids and proteins
D) proteins and cellulose
E) glycoproteins and cholesterol
For the following questions, match the labeled component of the cell membrane (Figure 7.1) with its description.
Figure 7.1
5) peripheral protein
6) cholesterol
7) fiber of the extracellular matrix
8) microfilament of the cytoskeleton
9) glycolipid
10) When biological membranes are frozen and then fractured, they tend to break along the middle of the bilayer. The best explanation for this is that
A) the integral membrane proteins are not strong enough to hold the bilayer together.
B) water that is present in the middle of the bilayer freezes and is easily fractured.
C) hydrophilic interactions between the opposite membrane surfaces are destroyed on freezing.
D) the carbon-carbon bonds of the phospholipid tails are easily broken.
E) the hydrophobic interactions that hold the membrane together are weakest at this point.
11) The presence of cholesterol in
Answers are attached
Enjoy
Biology, 8e (Campbell)
Chapter 7
Membrane Structure and Function
Multiple-Choice Questions
1) Who was/were the first to propose that cell membranes are phospholipid bilayers?
A) H. Davson and J. Danielli
B) I. Langmuir
C) C. Overton
D) S. Singer and G. Nicolson
E) E. Gorter and F. Grendel
2) Who proposed that membranes are a phospholipid bilayer between two layers of hydrophilic proteins?
A) H. Davson and J. Danielli
B) I. Langmuir
C) C. Overton
D) S. Singer and G. Nicolson
E) E. Gorter and F. Grendel
3) Who proposed that the membrane is a mosaic of protein molecules bobbing in a fluid bilayer of phospholipids?
A) H. Davson and J. Danielli
B) I. Langmuir
C) C. Overton
D) S. Singer and G. Nicolson
E) E. Gorter and F. Grendel
4) Which of the following types of molecules are the major structural components of the cell membrane?
A) phospholipids and cellulose
B) nucleic acids and proteins
C) phospholipids and proteins
D) proteins and cellulose
E) glycoproteins and cholesterol
For the following questions, match the labeled component of the cell membrane (Figure 7.1) with its description.
Figure 7.1
5) peripheral protein
6) cholesterol
7) fiber of the extracellular matrix
8) microfilament of the cytoskeleton
9) glycolipid
10) When biological membranes are frozen and then fractured, they tend to break along the middle of the bilayer. The best explanation for this is that
A) the integral membrane proteins are not strong enough to hold the bilayer together.
B) water that is present in the middle of the bilayer freezes and is easily fractured.
C) hydrophilic interactions between the opposite membrane surfaces are destroyed on freezing.
D) the carbon-carbon bonds of the phospholipid tails are easily broken.
E) the hydrophobic interactions that hold the membrane together are weakest at this point.
11) The presence of cholesterol in