Question 1

________ is the name given to the technique that utilizes radioactive molecules that bind to specific membrane proteins.

Accepted Answer

The answer of ________ is the name given to the...

Question 2

The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is

Accepted Answer

A) 7. 
B) 10. 
C) 16. 
D) 19. 
E) 24. 
A) 7. 
B) 10. 
C) 16. 
D) 19. 
E) 24.

Question 3

You are experimenting with a variety of lipids to determine their efficacy for use as drug delivery system liposomes.What is one feature of the individual lipid that would best ensure the use of a lipid for this purpose?

Accepted Answer

A) It must have a structure similar to cholesterol. 
B) It must be composed entirely of unsaturated fatty acids. 
C) It should be exclusively hydrophilic. 
D) It should be amphipathic. 
E) It should be exclusively hydrophobic. 
A) It must have a structure similar to cholesterol. 
B) It must be composed entirely of unsaturated fatty acids. 
C) It should be exclusively hydrophilic. 
D) It should be amphipathic. 
E) It should be exclusively hydrophobic.

Question 4

Which of the following organisms would contain sphingomyelin in its cell membrane?

Accepted Answer

A) bacteria 
B) algae 
C) animals 
D) bryophytes 
E) angiosperms 
A) bacteria 
B) algae 
C) animals 
D) bryophytes 
E) angiosperms

Question 5

Where would you expect to find an organism possessing a cell membrane composed of large proportions of cholesterol and a predominance of unsaturated fatty acids?

Accepted Answer

A) frozen wastelands 
B) temperate regions 
C) tropical regions 
D) equatorial regions 
E) upper levels of an aquatic environment 
A) frozen wastelands 
B) temperate regions 
C) tropical regions 
D) equatorial regions 
E) upper levels of an aquatic environment

Question 6

Consider the antimicrobial peptides (AMPs)that are classified as cationic and amphipathic as potential novel therapeutic agents in the treatment of leprosy (Mycobacterium leprae).In your response,describe AMPs,where they can be found in nature,and how this specific group of AMPs could be developed into a treatment for leprosy.

Accepted Answer

AMPs are small,biologically active pepti

Question 7

Based on the composition of cell membranes,the most prominent lipids are

Accepted Answer

A) phospholipids. 
B) glycolipids. 
C) cholesterol. 
D) phytosterol. 
E) cerebrosides. 
A) phospholipids. 
B) glycolipids. 
C) cholesterol. 
D) phytosterol. 
E) cerebrosides.

Question 8

Localized regions of membrane lipids that contain proteins involved in cell signaling are known as

Accepted Answer

A) hopanoids. 
B) membrane leaflets. 
C) homeoviscous adaptations. 
D) lipid rafts. 
E) islands of hydropathy. 
A) hopanoids. 
B) membrane leaflets. 
C) homeoviscous adaptations. 
D) lipid rafts. 
E) islands of hydropathy.

Question 9

Match between columns
                        Premises: Charles Overton
Gorter and Grendel
Singer and Nicolson
J.David Robertson
Unwin and Henderson
Davson and Danielli
Irving Langmuir

Accepted Answer

The Answer of used electron microscopy for the basis of is...

Question 10

The technique that allows various proteins to be differentiated based on size,once the proteins have been denatured,is

Accepted Answer

A) SDS-PAGE. 
B) photobleaching. 
C) liposome formation. 
D) ferritin-conjugated lectins. 
E) the freeze-fracture technique. 
A) SDS-PAGE. 
B) photobleaching. 
C) liposome formation. 
D) ferritin-conjugated lectins. 
E) the freeze-fracture technique.

Question 11

________ is a sterol associated with fungal cell membranes.

Accepted Answer

The answer of ________ is a sterol associated with fungal...

Question 12

________ are organisms that are unable to regulate their body temperature.

Accepted Answer

The answer of ________ are organisms that are unable to...

Question 13

Starting with shredded spinach leaves,you follow a procedure that allows for separation of cellular organelles.You are specifically looking for the fraction that contains the mitochondria.To identify this fraction,you should test for the

Accepted Answer

A) phospholipids unique to intracellular membranes. 
B) general presence of enzymes that fix carbon. 
C) phospholipids unique to the mitochondrial membrane. 
D) polysaccharides that specifically surround the mitochondria. 
E) presence of enzymes associated with cellular respiration. 
A) phospholipids unique to intracellular membranes. 
B) general presence of enzymes that fix carbon. 
C) phospholipids unique to the mitochondrial membrane. 
D) polysaccharides that specifically surround the mitochondria. 
E) presence of enzymes associated with cellular respiration.

Question 14

A means of detecting the presence of specific carbohydrate moieties on glycoproteins is

Accepted Answer

A) SDS-PAGE. 
B) the freeze-fracture technique. 
C) photobleaching. 
D) ferritin-conjugated lectins. 
E) liposome formation. 
A) SDS-PAGE. 
B) the freeze-fracture technique. 
C) photobleaching. 
D) ferritin-conjugated lectins. 
E) liposome formation.

Question 15

A prokaryotic organism is isolated from a hydrothermal vent,where it has been observed to be thriving.Based on your knowledge of the plasma membrane,you would expect to find a predominance of

Accepted Answer

A) largely saturated fatty acids. 
B) equal amounts of saturated and unsaturated fatty acids, as long as the chain was close to 12 carbons in length. 
C) polar fatty acids. 
D) largely unsaturated fatty acids. 
E) none of the above 
A) largely saturated fatty acids. 
B) equal amounts of saturated and unsaturated fatty acids, as long as the chain was close to 12 carbons in length. 
C) polar fatty acids. 
D) largely unsaturated fatty acids. 
E) none of the above

Question 16

Which of the following molecules would not readily cross an intact cell membrane by simple diffusion?

Accepted Answer

A) water 
B) glucose 
C) oxygen 
D) fatty acids 
E) ethanol 
A) water 
B) glucose 
C) oxygen 
D) fatty acids 
E) ethanol

Question 17

Match between columns
                        Premises: glycolipids
sterols
phospholipids

Accepted Answer

The Answer of cholesterol and triglycerides and 24-carbon fatty acids is...

Question 18

You are examining an electron micrograph of cells obtained from a new deep-sea life form.Upon closer examination,you notice that there are two dark lines separated by a lightly stained region.These results are similar to the observation of which investigator(s)of membrane structure?

Accepted Answer

A) Robertson 
B) Gorter and Grendel 
C) Unwin and Henderson 
D) Overton 
E) Singer and Nicolson 
A) Robertson 
B) Gorter and Grendel 
C) Unwin and Henderson 
D) Overton 
E) Singer and Nicolson

Question 19

Substances that can readily pass through the cell membrane are chemically ________ in nature.

Accepted Answer

hydrophobi

Question 20

Of the following lipids,which is found in approximately equal amounts in both the outer and inner portions of the lipid bilayer?

Accepted Answer

A) cholesterol 
B) glycolipid 
C) phosphatidylserine 
D) phophatidylethanolamine 
E) phophatidylinositol 
A) cholesterol 
B) glycolipid 
C) phosphatidylserine 
D) phophatidylethanolamine 
E) phophatidylinositol

Exam 7: Membranes: Their Structure, function, and Chemistry

________ is the name given to the technique that utilizes radioactive molecules that bind to specific membrane proteins.

The most common number of carbons in fatty acid hydrocarbon chains of membrane phospholipids is

You are experimenting with a variety of lipids to determine their efficacy for use as drug delivery system liposomes.What is one feature of the individual lipid that would best ensure the use of a lipid for this purpose?

Which of the following organisms would contain sphingomyelin in its cell membrane?

Where would you expect to find an organism possessing a cell membrane composed of large proportions of cholesterol and a predominance of unsaturated fatty acids?

Based on the composition of cell membranes,the most prominent lipids are

Localized regions of membrane lipids that contain proteins involved in cell signaling are known as

The technique that allows various proteins to be differentiated based on size,once the proteins have been denatured,is

________ is a sterol associated with fungal cell membranes.

________ are organisms that are unable to regulate their body temperature.

Starting with shredded spinach leaves,you follow a procedure that allows for separation of cellular organelles.You are specifically looking for the fraction that contains the mitochondria.To identify this fraction,you should test for the

A means of detecting the presence of specific carbohydrate moieties on glycoproteins is

A prokaryotic organism is isolated from a hydrothermal vent,where it has been observed to be thriving.Based on your knowledge of the plasma membrane,you would expect to find a predominance of

Which of the following molecules would not readily cross an intact cell membrane by simple diffusion?

You are examining an electron micrograph of cells obtained from a new deep-sea life form.Upon closer examination,you notice that there are two dark lines separated by a lightly stained region.These results are similar to the observation of which investigator(s)of membrane structure?

Substances that can readily pass through the cell membrane are chemically ________ in nature.

Of the following lipids,which is found in approximately equal amounts in both the outer and inner portions of the lipid bilayer?

A Preview of the Cell

The Chemistry of the Cell

The Macromolecules of the Cell

Cells and Organelles

Bioenergetics: the Flow of Energy in the Cell

Enzymes: the Catalysts of Life

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, chromosomes, and the Nucleus

The Cell Cycle, DNA Replication, and Mitosis

Sexual Reproduction, meiosis, and Genetic Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

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