A) are specialized cells for the synthesis of triglycerides. B) are specialized cells for short term energy storage. C) provide compartments for efficient membrane bilayer synthesis. D) exist primarily in a thin layer surrounding major muscle groups as a rapid high energy source. E) All of the above characterize adipocytes. A) are specialized cells for the synthesis of triglycerides. B) are specialized cells for short term energy storage. C) provide compartments for efficient membrane bilayer synthesis. D) exist primarily in a thin layer surrounding major muscle groups as a rapid high energy source. E) All of the above characterize adipocytes.

Exam 9: Lipids and Biological Membranes

Which of the following correctly describes the usefulness of SNAREs? I.They are essential for proper post-translation processing. II.They are a critical element in the function of the secretory pathway. III.They are effective at overcoming electrostatic repulsion between vesicle membranes. IV.They facilitate anchoring between vesicle membranes.

(Multiple Choice)

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Question 21

Which of the following structures correctly represents a glycerophospholipid?

(Multiple Choice)

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Question 22

Sphingolipids I.contain a glycerol core with a phosphocholine headgroup. II.contain a modified sphingosine. III.often function as receptor components of membranes. IV.function as a precursor to sterols.

(Multiple Choice)

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Question 23

Which of the following classes of proteins associates with the membrane bilayer with the lowest energy and would therefore be most difficult to separate from the membrane?

(Multiple Choice)

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Question 24

Adipocytes

(Multiple Choice)

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Question 25

Lung surfactants function to decrease the likelihood of collapse of the alveoli when air is expired.Based on your knowledge of lipids and amphipathic molecules, which of the following explains the mechanism by which the dipalmitoyl phosphatidylcholine (DPPC)can accomplish this task?

(Multiple Choice)

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Question 26

Matching -Eicosanoids are 20-carbon compounds derived from ______.

(Multiple Choice)

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Question 27

The signal peptide sequence I.is often used to direct proteins to the lysosome for incorporation into the lysosome. II.is usually not used for small eukaryotic proteins. III.of some transmembrane proteins is embedded into the membrane as an anchor. IV.is usually cleaved off the completed protein.

(Multiple Choice)

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Question 28

A researcher is developing a new drug for the treatment of influenza.Based on the information presented in the text about the influenza virus, which of the following drug reactions describes the action of this new drug?

(Multiple Choice)

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Question 29

Matching -A derivative of______ is the major lipid in lung surfactant.

(Multiple Choice)

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Question 30

The _________ model describes the cell membrane as an assortment of integral proteins suspended freely in a lipid bilayer.

(Multiple Choice)

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Question 31

In bacteria, phospholipids are synthesized:

(Multiple Choice)

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Question 32

Rank the melting points of the following fatty acids from highest to lowest: (1)cis-oleic(18:1) (2)trans-oleic (18:1) (3)linoleic (18:2) (4)steraic (18:0) (5)palmitic (16:0)

(Multiple Choice)

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Question 33

Transmembrane proteins I.are predominantly constructed of a single hydrophobic α-helix. II.are often constructed from bundles of hydrophobic $\beta$ -helices. III.are sometimes constructed from β-barrels with hydrophobic interiors and exteriors. IV.may have transmembrane helices identified by the free energy of transfer to water.

(Multiple Choice)

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Question 34

Which of the following points to the correct location of attachment for a fatty acid which would yield a ceramide?

(Multiple Choice)

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Question 35

A researcher has designed a new drug that will block the release of certain neurotransmitters from the synaptic cleft.Which of the following reactions must be blocked by this new drug?

(Multiple Choice)

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Question 36

Matching -A steroid-derived hormone that must be activated by hydroxylation, ______ regulates Ca²⁺ metabolism.

(Multiple Choice)

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Question 37

Triglycerides contain more metabolic energy per unit weight than glycogen because: I.Glycogen has greater polarity than fatty acids. II.Fatty acids predominate in an anhydrous form III.Fatty acids are less oxidized than carbohydrates. IV.Triglycerides have a higher average molecular mass.

(Multiple Choice)

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Question 38

Which of the structures below is an example of an $\omega$ -3 polyunsaturated fatty acid? $Which of the structures below is an example of an \omega -3 polyunsaturated fatty acid?$

(Multiple Choice)

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Question 39

The ___, which is found embedded in the endoplasmic reticulum, is a _ protein.

(Multiple Choice)

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Question 40

Showing 21 - 40 of 59

Exam 9: Lipids and Biological Membranes

Which of the following structures correctly represents a glycerophospholipid?

Sphingolipids I.contain a glycerol core with a phosphocholine headgroup. II.contain a modified sphingosine. III.often function as receptor components of membranes. IV.function as a precursor to sterols.

Which of the following classes of proteins associates with the membrane bilayer with the lowest energy and would therefore be most difficult to separate from the membrane?

Adipocytes

Lung surfactants function to decrease the likelihood of collapse of the alveoli when air is expired.Based on your knowledge of lipids and amphipathic molecules, which of the following explains the mechanism by which the dipalmitoyl phosphatidylcholine (DPPC)can accomplish this task?

Matching -Eicosanoids are 20-carbon compounds derived from ______.

The signal peptide sequence I.is often used to direct proteins to the lysosome for incorporation into the lysosome. II.is usually not used for small eukaryotic proteins. III.of some transmembrane proteins is embedded into the membrane as an anchor. IV.is usually cleaved off the completed protein.

A researcher is developing a new drug for the treatment of influenza.Based on the information presented in the text about the influenza virus, which of the following drug reactions describes the action of this new drug?

Matching -A derivative of______ is the major lipid in lung surfactant.

The _________ model describes the cell membrane as an assortment of integral proteins suspended freely in a lipid bilayer.

In bacteria, phospholipids are synthesized:

Rank the melting points of the following fatty acids from highest to lowest: (1)cis-oleic(18:1) (2)trans-oleic (18:1) (3)linoleic (18:2) (4)steraic (18:0) (5)palmitic (16:0)

Which of the following points to the correct location of attachment for a fatty acid which would yield a ceramide?

A researcher has designed a new drug that will block the release of certain neurotransmitters from the synaptic cleft.Which of the following reactions must be blocked by this new drug?

Matching -A steroid-derived hormone that must be activated by hydroxylation, ______ regulates Ca2+ metabolism.

Triglycerides contain more metabolic energy per unit weight than glycogen because: I.Glycogen has greater polarity than fatty acids. II.Fatty acids predominate in an anhydrous form III.Fatty acids are less oxidized than carbohydrates. IV.Triglycerides have a higher average molecular mass.

Which of the structures below is an example of an ω\omegaω -3 polyunsaturated fatty acid?

The _________, which is found embedded in the endoplasmic reticulum, is a _______ protein.

Introduction to the Chemistry of Life

Water

Nucleotides, Nucleic Acids, and Genetic Information

Amino Acids

Proteins: Primary Structure

Proteins: Three-Dimensional Structure

Protein Function Part I: Myoglobin and Hemoglobin

Carbohydrates

Membrane Transport

Enzyme Catalysis

Enzyme Kinetics, Inhibition and Control

Biochemical Signaling

Introduction to Metabolism

Glycogen Metabolism and Gluconeogenesis

Glucose Catabolism

Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Photosynthesis

Lipid Metabolism

Amino Acid Metabolism

Mammalian Fuel Metabolism: Integration and Regulation

Nucleotide Metabolism

Nucleic Acid Structure

Dna Replication, Repair and Recombination

Transcription and Rna Processing

Translation

Regulation of Gene Expression

Filters

Matching -A steroid-derived hormone that must be activated by hydroxylation, ______ regulates Ca²⁺ metabolism.

Which of the structures below is an example of an $\omega$ -3 polyunsaturated fatty acid? $Which of the structures below is an example of an \omega -3 polyunsaturated fatty acid?$

The ___, which is found embedded in the endoplasmic reticulum, is a _ protein.