Question 1

The currently accepted model of membrane structure, proposed by Singer and Nicolson, is called the _______ model.

Accepted Answer

The answer of The currently accepted model of membrane structure,...

Question 2

Coated pits are converted to coated vesicles by formation of rings of the protein

Accepted Answer

A)  caveolin. 
B)  clathrin. 
C)  COPI. 
D)  dynamin. 
A)  caveolin. 
B)  clathrin. 
C)  COPI. 
D)  dynamin.

Question 3

Phosphatidylcholine is the only major phospholipid in the plasma membrane.

Accepted Answer

A) True 
 B)False

Question 4

According to the generally accepted fluid mosaic model of membrane structure, membranes are two-dimensional fluids through which proteins can move freely in lateral directions. Provide an example of a membrane protein that is not free to move laterally within a plasma membrane.

Accepted Answer

Some membrane proteins are associated wi

Question 5

The resting potential of a typical eukaryotic cell is _______ mV.

Accepted Answer

A)  0 
B)  -60 
C)  +60 
D)  -100 
A)  0 
B)  -60 
C)  +60 
D)  -100

Question 6

Gene therapy for cystic fibrosis involves transfer of the _______ gene into bronchial epithelia.

Accepted Answer

A)  CFTR 
B)  mucin 
C)  Na+-K+ pump 
D)  MDR transporter 
A)  CFTR 
B)  mucin 
C)  Na+-K+ pump 
D)  MDR transporter

Question 7

Which of the following features of a membrane protein is never used as a membrane anchor?

Accepted Answer

A)  C-terminal glycosylphosphatidyl inositol (GPI) 
B)  An N-terminal myristoyl group 
C)  Prenyl and palmitoyl group additions 
D)  Oligosaccharide side chains 
A)  C-terminal glycosylphosphatidyl inositol (GPI) 
B)  An N-terminal myristoyl group 
C)  Prenyl and palmitoyl group additions 
D)  Oligosaccharide side chains

Question 8

Transport of glucose into the intestinal epithelium is driven by ion gradients established by the

Accepted Answer

A)  ATP pump. 
B)  H+ pump. 
C)  Na+-K+ pump. 
D)  K+ channel. 
A)  ATP pump. 
B)  H+ pump. 
C)  Na+-K+ pump. 
D)  K+ channel.

Question 9

Facilitated diffusion is a lipid-mediated process.

Accepted Answer

A) True 
 B)False

Question 10

How does the plasma membrane come to be hyperpolarized locally during action potential reversal?

Accepted Answer

The development of an action potential i

Question 11

Frye and Edidin demonstrated the mobility of membrane proteins with the use of fused human and mouse cells. Briefly describe the results of their experiment.

Accepted Answer

Immediately after fusion, the human and

Question 12

The major ATPase maintaining the plasma membrane potential is the Na+-K+ pump.

Accepted Answer

A) True 
 B)False

Question 13

Clusters of sphingolipids, cholesterol, and membrane proteins that move together laterally in the plane of the plasma membrane are called lipid

Accepted Answer

A)  boats. 
B)  barrels. 
C)  rafts. 
D)  barges. 
A)  boats. 
B)  barrels. 
C)  rafts. 
D)  barges.

Question 14

The plasma membrane of intestinal epithelial cells is divided into two domains: the _______ domain and the _______ domain.

Accepted Answer

The answer of The plasma membrane of intestinal epithelial cells...

Question 15

Phagocytosis is an example of macropinocytosis.

Accepted Answer

A) True 
 B)False

Question 16

What would be the resting potential across an artificial membrane if all charged molecules on both sides were equally permeable?

Accepted Answer

A)  -60 mV 
B)  +60 mV 
C)  0 mV 
D)  -1 mV 
A)  -60 mV 
B)  +60 mV 
C)  0 mV 
D)  -1 mV

Question 17

Molecules that diffuse passively across the plasma membrane most rapidly are

Accepted Answer

A)  small. 
B)  hydrophobic. 
C)  small and hydrophobic. 
D)  small and hydrophilic. 
A)  small. 
B)  hydrophobic. 
C)  small and hydrophobic. 
D)  small and hydrophilic.

Question 18

Active transport is transport in an energetically

Accepted Answer

A)  unfavorable direction, always driven by hydrolysis of ATP. 
B)  unfavorable direction, always coupled to another reaction or source of energy. 
C)  unfavorable direction, driven only by the flow of another molecule across a membrane. 
D)  favorable direction, coupled to the hydrolysis of ATP. 
A)  unfavorable direction, always driven by hydrolysis of ATP. 
B)  unfavorable direction, always coupled to another reaction or source of energy. 
C)  unfavorable direction, driven only by the flow of another molecule across a membrane. 
D)  favorable direction, coupled to the hydrolysis of ATP.

Question 19

The drug ouabain inhibits the plasma membrane Na+-K+ pump. Why does it also inhibit glucose transport across the intestinal epithelial layer?

Accepted Answer

A Na⁺-glucose transporter is responsible

Question 20

Plasma membrane phospholipids are

Accepted Answer

A)  located mostly in the outer leaflet of the bilayer. 
B)  located mostly in the inner leaflet of the bilayer. 
C)  symmetrically distributed between the two membrane halves. 
D)  asymmetrically distributed between the two membrane halves. 
A)  located mostly in the outer leaflet of the bilayer. 
B)  located mostly in the inner leaflet of the bilayer. 
C)  symmetrically distributed between the two membrane halves. 
D)  asymmetrically distributed between the two membrane halves.

The currently accepted model of membrane structure, proposed by Singer and Nicolson, is called the _______ model.

Coated pits are converted to coated vesicles by formation of rings of the protein

Phosphatidylcholine is the only major phospholipid in the plasma membrane.

According to the generally accepted fluid mosaic model of membrane structure, membranes are two-dimensional fluids through which proteins can move freely in lateral directions. Provide an example of a membrane protein that is not free to move laterally within a plasma membrane.

The resting potential of a typical eukaryotic cell is _______ mV.

Gene therapy for cystic fibrosis involves transfer of the _______ gene into bronchial epithelia.

Which of the following features of a membrane protein is never used as a membrane anchor?

Transport of glucose into the intestinal epithelium is driven by ion gradients established by the

Facilitated diffusion is a lipid-mediated process.

How does the plasma membrane come to be hyperpolarized locally during action potential reversal?

Frye and Edidin demonstrated the mobility of membrane proteins with the use of fused human and mouse cells. Briefly describe the results of their experiment.

The major ATPase maintaining the plasma membrane potential is the Na⁺-K⁺ pump.

Clusters of sphingolipids, cholesterol, and membrane proteins that move together laterally in the plane of the plasma membrane are called lipid

The plasma membrane of intestinal epithelial cells is divided into two domains: the _ domain and the _ domain.

Phagocytosis is an example of macropinocytosis.

What would be the resting potential across an artificial membrane if all charged molecules on both sides were equally permeable?

Molecules that diffuse passively across the plasma membrane most rapidly are

Active transport is transport in an energetically

The drug ouabain inhibits the plasma membrane Na⁺-K⁺ pump. Why does it also inhibit glucose transport across the intestinal epithelial layer?

Plasma membrane phospholipids are

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

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Exam 15: The Plasma Membrane

The currently accepted model of membrane structure, proposed by Singer and Nicolson, is called the _______ model.

Coated pits are converted to coated vesicles by formation of rings of the protein

Phosphatidylcholine is the only major phospholipid in the plasma membrane.

According to the generally accepted fluid mosaic model of membrane structure, membranes are two-dimensional fluids through which proteins can move freely in lateral directions. Provide an example of a membrane protein that is not free to move laterally within a plasma membrane.

The resting potential of a typical eukaryotic cell is _______ mV.

Gene therapy for cystic fibrosis involves transfer of the _______ gene into bronchial epithelia.

Which of the following features of a membrane protein is never used as a membrane anchor?

Transport of glucose into the intestinal epithelium is driven by ion gradients established by the

Facilitated diffusion is a lipid-mediated process.

How does the plasma membrane come to be hyperpolarized locally during action potential reversal?

Frye and Edidin demonstrated the mobility of membrane proteins with the use of fused human and mouse cells. Briefly describe the results of their experiment.

The major ATPase maintaining the plasma membrane potential is the Na+-K+ pump.

Clusters of sphingolipids, cholesterol, and membrane proteins that move together laterally in the plane of the plasma membrane are called lipid

The plasma membrane of intestinal epithelial cells is divided into two domains: the _______ domain and the _______ domain.

Phagocytosis is an example of macropinocytosis.

What would be the resting potential across an artificial membrane if all charged molecules on both sides were equally permeable?

Molecules that diffuse passively across the plasma membrane most rapidly are

Active transport is transport in an energetically

The drug ouabain inhibits the plasma membrane Na+-K+ pump. Why does it also inhibit glucose transport across the intestinal epithelial layer?

Plasma membrane phospholipids are

An Overview of Cells and Cell Research

Molecules and Membranes

Bioenergetics and Metabolism

Fundamentals of Molecular Biology

Genomics, Proteomics, and Systems Biology

Genes and Genomes

Replication, Maintenance, and Rearrangements of Genomic Dna

RNA Synthesis and Processing

Transcriptional Regulation and Epigenetics

Protein Synthesis, Processing, and Regulation

The Nucleus

Protein Sorting and Transport

Mitochondria, Chloroplasts, and Peroxisomes

The Cytoskeleton and Cell Movement

Cell Walls, the Extracellular Matrix, and Cell Interactions

Cell Signaling

The Cell Cycle

Cell Death and Cell Renewal

Cancer

Filters

The major ATPase maintaining the plasma membrane potential is the Na⁺-K⁺ pump.

The plasma membrane of intestinal epithelial cells is divided into two domains: the _ domain and the _ domain.

The drug ouabain inhibits the plasma membrane Na⁺-K⁺ pump. Why does it also inhibit glucose transport across the intestinal epithelial layer?