Question 1

The basic structure of cell membranes consists of

Accepted Answer

A) protein micelles studded with phospholipids. 
B) protein bilayers studded with phospholipids. 
C) one protein layer and one phospholipid layer. 
D) phospholipid micelles studded with proteins. 
E) phospholipid bilayers studded with proteins. 
A) protein micelles studded with phospholipids. 
B) protein bilayers studded with phospholipids. 
C) one protein layer and one phospholipid layer. 
D) phospholipid micelles studded with proteins. 
E) phospholipid bilayers studded with proteins.

Question 2

A sphingomyelin includes all of the following components except

Accepted Answer

A) amino alcohol. 
B) phosphate group. 
C) sphingosine. 
D) glycerol. 
E) fatty acid. 
A) amino alcohol. 
B) phosphate group. 
C) sphingosine. 
D) glycerol. 
E) fatty acid.

Question 3

Which of the following has a structure similar to a lipid bilayer?

Accepted Answer

A) liposomes 
B) integral proteins 
C) peripheral proteins 
D) glycoproteins 
E) cholesterol 
A) liposomes 
B) integral proteins 
C) peripheral proteins 
D) glycoproteins 
E) cholesterol

Question 4

Biomolecules classified as lipids are

Accepted Answer

A) polyhydroxy aldehydes or ketones,or compounds which produce those when hydrolyzed. 
B) polymers of α-amino acids. 
C) soluble in non-polar solvents. 
D) six-membered rings with delocalized electrons. 
E) polymers of diacids and diamines. 
A) polyhydroxy aldehydes or ketones,or compounds which produce those when hydrolyzed. 
B) polymers of α-amino acids. 
C) soluble in non-polar solvents. 
D) six-membered rings with delocalized electrons. 
E) polymers of diacids and diamines.

Question 5

Oils are generally ________ at room temperature and are obtained from ________.

Accepted Answer

A) liquids;plants 
B) liquids;animals 
C) solids;plants 
D) solids;animals 
E) none of the above 
A) liquids;plants 
B) liquids;animals 
C) solids;plants 
D) solids;animals 
E) none of the above

Question 6

The biochemical roles of lipids are

Accepted Answer

A) short-term energy storage,transport of molecules,and structural support. 
B) storage of excess energy,component of cell membranes,and chemical messengers. 
C) catalysis,protection against outside invaders,motion. 
D) component of cell membranes,catalysis,and structural support. 
E) neurotransmitters,hormones,transport of molecules. 
A) short-term energy storage,transport of molecules,and structural support. 
B) storage of excess energy,component of cell membranes,and chemical messengers. 
C) catalysis,protection against outside invaders,motion. 
D) component of cell membranes,catalysis,and structural support. 
E) neurotransmitters,hormones,transport of molecules.

Question 7

All of the following types of molecules can be classified as lipids except

Accepted Answer

A) triacylglycerols. 
B) steroids. 
C) glycoproteins. 
D) eicosanoids. 
E) sphingomyelins. 
A) triacylglycerols. 
B) steroids. 
C) glycoproteins. 
D) eicosanoids. 
E) sphingomyelins.

Question 8

A certain glycerophospholipid is made of glycerol,two fatty acids,a phosphate and ethanolamine.Which components do carboxylic ester linkages connect?

Accepted Answer

A) the fatty acids and phosphate 
B) glycerol and ethanolamine 
C) glycerol and the fatty acids 
D) phosphate and ethanolamine 
E) There are no carboxylic ester linkages. 
A) the fatty acids and phosphate 
B) glycerol and ethanolamine 
C) glycerol and the fatty acids 
D) phosphate and ethanolamine 
E) There are no carboxylic ester linkages.

Question 9

Biomolecules can be classified as lipids on the basis of

Accepted Answer

A) a common structure consisting of long hydrocarbon chains. 
B) the presence of many hydroxyl groups and at least one carbonyl group. 
C) the presence of at least one amine group and one carboxylic acid group on each molecule. 
D) the physical properties of odor,color,and melting point within certain guidelines. 
E) the physical property of solubility in nonpolar organic solvents. 
A) a common structure consisting of long hydrocarbon chains. 
B) the presence of many hydroxyl groups and at least one carbonyl group. 
C) the presence of at least one amine group and one carboxylic acid group on each molecule. 
D) the physical properties of odor,color,and melting point within certain guidelines. 
E) the physical property of solubility in nonpolar organic solvents.

Question 10

Match the following.
-simple diffusion

Accepted Answer

A) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
B) describes fatty acids that have mostly single but more than one double carbon-carbon bond 
C) describes the polar portion of a molecule that interacts readily with water or other polar substances 
D) a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy 
E) describes fatty acids that have mostly single but at least one double carbon-carbon bond
F)describes fatty acids that do not have any carbon-carbon double bonds
G)a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane
H)a process of transport that costs energy because the flow is against the concentration gradient 
A) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
B) describes fatty acids that have mostly single but more than one double carbon-carbon bond 
C) describes the polar portion of a molecule that interacts readily with water or other polar substances 
D) a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy 
E) describes fatty acids that have mostly single but at least one double carbon-carbon bond
F)describes fatty acids that do not have any carbon-carbon double bonds
G)a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane
H)a process of transport that costs energy because the flow is against the concentration gradient

Question 11

The hydrocarbon end of a soap molecule is

Accepted Answer

A) hydrophilic and attracted to grease. 
B) hydrophobic and attracted to grease. 
C) hydrophilic and attracted to water. 
D) hydrophobic and attracted to water. 
E) neither hydrophobic nor hydrophilic. 
A) hydrophilic and attracted to grease. 
B) hydrophobic and attracted to grease. 
C) hydrophilic and attracted to water. 
D) hydrophobic and attracted to water. 
E) neither hydrophobic nor hydrophilic.

Question 12

The process of moving solutes into or out of a cell against the natural concentration gradient is called

Accepted Answer

A) active transport. 
B) passive transport. 
C) facilitated diffusion. 
D) diffusive transport. 
E) allotropic migration. 
A) active transport. 
B) passive transport. 
C) facilitated diffusion. 
D) diffusive transport. 
E) allotropic migration.

Question 13

All of the following are components of a cell membrane except

Accepted Answer

A) liposomes. 
B) integral proteins. 
C) peripheral proteins. 
D) glycoproteins. 
E) cholesterol. 
A) liposomes. 
B) integral proteins. 
C) peripheral proteins. 
D) glycoproteins. 
E) cholesterol.

Question 14

Most naturally occurring monounsaturated fatty acids can be classified as which of the following?

Accepted Answer

A) d 
B) l 
C) cis 
D) trans 
E) none of the above 
A) d 
B) l 
C) cis 
D) trans 
E) none of the above

Question 15

Use the terms hydrophobic,hydrophilic,and micelle to explain how a soap removes grease from fabric.

Accepted Answer

Soap molecules are salts of fatty acids,

Question 16

Which molecule is a saturated fatty acid?

Accepted Answer

A) lauric acid 
B) linoleic acid 
C) arachidonic acid 
D) butyric acid 
E) oleic acid 
A) lauric acid 
B) linoleic acid 
C) arachidonic acid 
D) butyric acid 
E) oleic acid

Question 17

Eicosanoids function as

Accepted Answer

A) sex hormones. 
B) thyroid hormones. 
C) local hormones. 
D) neurotransmitters. 
E) membrane components. 
A) sex hormones. 
B) thyroid hormones. 
C) local hormones. 
D) neurotransmitters. 
E) membrane components.

Question 18

Local hormones

Accepted Answer

A) are short-lived. 
B) can be prostaglandins. 
C) can be leukotrienes. 
D) act near their point of synthesis. 
E) all of the above 
A) are short-lived. 
B) can be prostaglandins. 
C) can be leukotrienes. 
D) act near their point of synthesis. 
E) all of the above

Question 19

Match the following.
-polyunsaturated

Accepted Answer

A) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
B) describes fatty acids that have mostly single but more than one double carbon-carbon bond 
C) describes the polar portion of a molecule that interacts readily with water or other polar substances 
D) a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy 
E) describes fatty acids that have mostly single but at least one double carbon-carbon bond
F)describes fatty acids that do not have any carbon-carbon double bonds
G)a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane
H)a process of transport that costs energy because the flow is against the concentration gradient 
A) describes the non-polar portion of a molecule that does not interact with water or other polar substances 
B) describes fatty acids that have mostly single but more than one double carbon-carbon bond 
C) describes the polar portion of a molecule that interacts readily with water or other polar substances 
D) a process of transport in which substances cross a membrane based on concentration differences without the expenditure of energy 
E) describes fatty acids that have mostly single but at least one double carbon-carbon bond
F)describes fatty acids that do not have any carbon-carbon double bonds
G)a process of transport in which integral proteins change shape to allow a substance to cross a cell membrane
H)a process of transport that costs energy because the flow is against the concentration gradient

Question 20

Sphingomyelin is made of

Accepted Answer

A) sphingosine,a fatty acid,and phosphoryl choline. 
B) sphingosine,a fatty acid,and a trisaccharide. 
C) sphingosine,a fatty acid,and glucose. 
D) glycerol and a fatty acid. 
E) glycerol,a fatty acid,and phosphate. 
A) sphingosine,a fatty acid,and phosphoryl choline. 
B) sphingosine,a fatty acid,and a trisaccharide. 
C) sphingosine,a fatty acid,and glucose. 
D) glycerol and a fatty acid. 
E) glycerol,a fatty acid,and phosphate.

Exam 23: Lipids

The basic structure of cell membranes consists of

A sphingomyelin includes all of the following components except

Which of the following has a structure similar to a lipid bilayer?

Biomolecules classified as lipids are

Oils are generally ________ at room temperature and are obtained from ________.

The biochemical roles of lipids are

All of the following types of molecules can be classified as lipids except

A certain glycerophospholipid is made of glycerol,two fatty acids,a phosphate and ethanolamine.Which components do carboxylic ester linkages connect?

Biomolecules can be classified as lipids on the basis of

Match the following. -simple diffusion

The hydrocarbon end of a soap molecule is

The process of moving solutes into or out of a cell against the natural concentration gradient is called

All of the following are components of a cell membrane except

Most naturally occurring monounsaturated fatty acids can be classified as which of the following?

Use the terms hydrophobic,hydrophilic,and micelle to explain how a soap removes grease from fabric.

Which molecule is a saturated fatty acid?

Eicosanoids function as

Local hormones

Match the following. -polyunsaturated

Sphingomyelin is made of

Matter and Measurements

Atoms and the Periodic Table

Ionic Compounds

Molecular Compounds

Classification and Balancing of Chemical Reactions

Chemical Reactions: Mole and Mass Relationships

Chemical Reactions: Energy, rates, and Equilibrium

Gases, liquids, and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Chemistry: Alkanes

Alkenes, alkynes, and Aromatic Compounds

Some Compounds With Oxygen, sulfur, or a Halogen

Aldehydes and Ketones

Amines

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

Carbohydrates

The Generation of Biochemical Energy

Carbohydrate Metabolism

Lipid Metabolism

Protein and Amino Acid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

Oils are generally at room temperature and are obtained from .