Question 1

_______________ inserts into lipid bilayers, disrupting interactions between fatty acids, thereby helping to maintain membrane fluidity.

Accepted Answer

The answer of _______________ inserts into lipid bilayers, disrupting interactions...

Question 2

The fluorescence recovery after photobleaching (FRAP) technique has been used to study:

Accepted Answer

A)  membrane composition. 
B)  the lateral diffusion in membranes. 
C)  protein structural motifs in membranes. 
D)  All of the above. 
E)  None of the above. 
A)  membrane composition. 
B)  the lateral diffusion in membranes. 
C)  protein structural motifs in membranes. 
D)  All of the above. 
E)  None of the above.

Question 3

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The process by which lipids and proteins move in the membrane bilayer.

Accepted Answer

A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low 
A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low

Question 4

The rate of lateral diffusion is such that a phospholipid molecule can travel from one end of a bacterium to the other in _______________ of time.

Accepted Answer

The answer of The rate of lateral diffusion is such...

Question 5

_______________ membrane proteins are bound primarily by electrostatic and hydrogen-bond interactions with the head groups of lipids.

Accepted Answer

The answer of _______________ membrane proteins are bound primarily by...

Question 6

How do proteins function to make membranes selectively permeable?

Accepted Answer

Many of the proteins found in

Question 7

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: These membrane components contain carbohydrates.

Accepted Answer

A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low 
A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low

Question 8

Which of the following statements is consistent with the structure of biological membranes?

Accepted Answer

A)  All membrane proteins are integral and associate with the hydrophobic region of the membrane. 
B)  Both proteins and lipids readily undergo transverse ("flip-flop") diffusion from the inside to the outside of the membrane. 
C)  Membranes are symmetric. 
D)  The membrane lipids self-assemble to form the lipid bilayer. 
E)  A biological membrane consists of proteins sandwiched between two layers of lipids, which is referred to as a lipid bilayer. 
A)  All membrane proteins are integral and associate with the hydrophobic region of the membrane. 
B)  Both proteins and lipids readily undergo transverse ("flip-flop") diffusion from the inside to the outside of the membrane. 
C)  Membranes are symmetric. 
D)  The membrane lipids self-assemble to form the lipid bilayer. 
E)  A biological membrane consists of proteins sandwiched between two layers of lipids, which is referred to as a lipid bilayer.

Question 9

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: This substance inhibits prostaglandin H2 synthase-1 by blocking the channel through which the substrate, arachidonate, travels.

Accepted Answer

A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low 
A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low

Question 10

Which is the proper order of permeability of molecules across a membrane, from the most permeable to the least?

Accepted Answer

A)  water, glucose, urea, sodium ion 
B)  water, indole, glucose, sodium ion 
C)  water, indole, sodium ion, glucose 
D)  indole, glucose, urea, sodium ion 
E)  indole, water, glucose, sodium ion 
A)  water, glucose, urea, sodium ion 
B)  water, indole, glucose, sodium ion 
C)  water, indole, sodium ion, glucose 
D)  indole, glucose, urea, sodium ion 
E)  indole, water, glucose, sodium ion

Question 11

How do secondary transporters drive the transport of a substance up its concentration gradient?

Accepted Answer

The thermodynamicall

Question 12

The degree of membrane fluidity depends on:

Accepted Answer

A)  the percentage of lipids that contain choline. 
B)  the percentage of glycolipids. 
C)  the percentage of free fatty acids. 
D)  the percentage of unsaturated fatty acids. 
E)  None of the above. 
A)  the percentage of lipids that contain choline. 
B)  the percentage of glycolipids. 
C)  the percentage of free fatty acids. 
D)  the percentage of unsaturated fatty acids. 
E)  None of the above.

Question 13

Carbohydrate residues attached to the membrane lipids are:

Accepted Answer

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

Question 14

Flip-flopping of lipids take place once in several hours. This is evidence for what?

Accepted Answer

That the transverse diffusion

Question 15

What is the function of prostaglandin H2 synthase-1? How does its position in the membrane facilitate its activity?

Accepted Answer

Prostaglandin H2 synthase-1 converts ara

Question 16

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The type of amino acid found in the transmembrane helix of an integral protein.

Accepted Answer

A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low 
A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low

Question 17

Membranes are said to be ____________ because their two faces always differ from each other.

Accepted Answer

The answer of Membranes are said to be ____________ because...

Question 18

Use the following to answer questions
Choose the correct answer from the list below. Not all of the answers will be used.
-Cells maintain a ____________ concentration of intracellular potassium as compared to the extracellular concentration.

Accepted Answer

A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low 
A) glycolipids 
B) closed biomolecular sheets 
C) lateral diffusion 
D) integral 
E) hydrophobic effect
F)acetylsalicylic acid (aspirin)
G)water
H)lipid raft
I)hydrophobic
J)ions
K)high
L)peripheral
M)low

Question 19

_______________ are bilayer lipid vesicles with an aqueous compartment.

Accepted Answer

The answer of _______________ are bilayer lipid vesicles with an...

Question 20

How many molecules thick are membranes?

Accepted Answer

A)  2 
B)  1 
C)  infinite 
D)  they are of varying thickness, depending on their structure 
E)  None of the above. 
A)  2 
B)  1 
C)  infinite 
D)  they are of varying thickness, depending on their structure 
E)  None of the above.

Exam 12: Membrane Structure and Function

_______________ inserts into lipid bilayers, disrupting interactions between fatty acids, thereby helping to maintain membrane fluidity.

The fluorescence recovery after photobleaching (FRAP) technique has been used to study:

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The process by which lipids and proteins move in the membrane bilayer.

The rate of lateral diffusion is such that a phospholipid molecule can travel from one end of a bacterium to the other in _______________ of time.

_______________ membrane proteins are bound primarily by electrostatic and hydrogen-bond interactions with the head groups of lipids.

How do proteins function to make membranes selectively permeable?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: These membrane components contain carbohydrates.

Which of the following statements is consistent with the structure of biological membranes?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: This substance inhibits prostaglandin H2 synthase-1 by blocking the channel through which the substrate, arachidonate, travels.

Which is the proper order of permeability of molecules across a membrane, from the most permeable to the least?

How do secondary transporters drive the transport of a substance up its concentration gradient?

The degree of membrane fluidity depends on:

Carbohydrate residues attached to the membrane lipids are:

Flip-flopping of lipids take place once in several hours. This is evidence for what?

What is the function of prostaglandin H2 synthase-1? How does its position in the membrane facilitate its activity?

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -____________: The type of amino acid found in the transmembrane helix of an integral protein.

Membranes are said to be ____________ because their two faces always differ from each other.

Use the following to answer questions Choose the correct answer from the list below. Not all of the answers will be used. -Cells maintain a ____________ concentration of intracellular potassium as compared to the extracellular concentration.

_______________ are bilayer lipid vesicles with an aqueous compartment.

How many molecules thick are membranes?

Biochemistry and the Unity of Life

Water, Weak Bonds, and the Generation of Order Out of Chaos

Amino Acids

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

Fatty Acid Degredation

Fatty Acid Synthesis

Lipid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant Dna Techniques

Filters