Question 1

Carbohydrate residues attached to the membrane lipids are almost always

Accepted Answer

A)  positioned on the intracellular side of the membrane. 
B)  positioned on the inside center of the bilayer. 
C)  positioned on the extracellular side of the membrane. 
D)  positioned equally on both sides of the membrane. 
E)  also covalently attached to membrane proteins. 
A)  positioned on the intracellular side of the membrane. 
B)  positioned on the inside center of the bilayer. 
C)  positioned on the extracellular side of the membrane. 
D)  positioned equally on both sides of the membrane. 
E)  also covalently attached to membrane proteins.

Question 2

How are lipid bilayers formed? What is/are the driving forces?

Accepted Answer

Bimolecular sheets of lipids form sponta

Question 3

Eukaryotic cells are distinguished from prokaryotic cells by the presence of membranes inside the cell that form internal compartments. What are some examples?

Accepted Answer

Peroxisomes play a major role in the oxi

Question 4

The low incidence of protein or lipid flip-flop in a membrane preserves

Accepted Answer

A)  membrane fluidity. 
B)  membrane melting temperatures. 
C)  membrane asymmetry. 
D)  membrane fluidity and membrane melting temperatures. 
E)  All of the answers are correct. 
A)  membrane fluidity. 
B)  membrane melting temperatures. 
C)  membrane asymmetry. 
D)  membrane fluidity and membrane melting temperatures. 
E)  All of the answers are correct.

Question 5

What is the most common process by which lipids and proteins move in the membrane bilayer?

Accepted Answer

A)  kinesin-mediated movement 
B)  flip-flopping 
C)  translocation 
D)  lateral diffusion 
E)  asymmetric longitudinal flipping 
A)  kinesin-mediated movement 
B)  flip-flopping 
C)  translocation 
D)  lateral diffusion 
E)  asymmetric longitudinal flipping

Question 6

Explain the relationship between the endoplasmic reticulum and the nuclear membrane and one additional characteristic about the nuclear membrane that sets it apart from other membranes.

Accepted Answer

The nuclear membrane and endop

Question 7

What protein polymerizes into a lattice network around a budding membrane?

Accepted Answer

A)  porin 
B)  clathrin 
C)  epsin 
D)  G protein 
E)  glycophorin 
A)  porin 
B)  clathrin 
C)  epsin 
D)  G protein 
E)  glycophorin

Question 8

Hydrophobic molecules can be covalently attached to proteins to increase membrane association. Type(s) of group(s) include

Accepted Answer

A)  palmitoyl groups attached via Cys residues. 
B)  glycolipid structures attached to the carboxy terminus. 
C)  farnesyl groups attached via Cys residues. 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  palmitoyl groups attached via Cys residues. 
B)  glycolipid structures attached to the carboxy terminus. 
C)  farnesyl groups attached via Cys residues. 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Question 9

What is receptor-mediated endocytosis?

Accepted Answer

Receptor-mediated endocytosis

Exam 12: Lipids and Cell Membranes

Carbohydrate residues attached to the membrane lipids are almost always

How are lipid bilayers formed? What is/are the driving forces?

Eukaryotic cells are distinguished from prokaryotic cells by the presence of membranes inside the cell that form internal compartments. What are some examples?

The low incidence of protein or lipid flip-flop in a membrane preserves

What is the most common process by which lipids and proteins move in the membrane bilayer?

Explain the relationship between the endoplasmic reticulum and the nuclear membrane and one additional characteristic about the nuclear membrane that sets it apart from other membranes.

What protein polymerizes into a lattice network around a budding membrane?

Hydrophobic molecules can be covalently attached to proteins to increase membrane association. Type(s) of group(s) include

What is receptor-mediated endocytosis?

Biochemistry: an Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

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