Question 1

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. A

Question 2

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. E

Question 3

Which substance will not be transported into a cell by simple diffusion?

Accepted Answer

A) CO2 
B) O2 
C) estrogen 
D) cortisone 
E) epinephrine 
A) CO2 
B) O2 
C) estrogen 
D) cortisone 
E) epinephrine E

Question 4

Describe the similarities and differences between soaps and emulsifying agents.

Accepted Answer

Both soaps and emulsifiers work in the s

Question 5

Match the following.
-polyunsaturated

Accepted Answer

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

Question 6

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 7

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 8

The product of an esterification reaction between which of the following molecules would be an oil?
I.CH3 (CH2)14COOH
II.CH3 (CH2)7CHCH(CH2)7COOH
III.HOCH2CH2OH
IV.HOCH2CH(OH)CH2OH

Accepted Answer

A) I and IV 
B) II and III 
C) II and IV 
D) I and III 
E) I and II 
A) I and IV 
B) II and III 
C) II and IV 
D) I and III 
E) I and II

Question 9

Sphingomyelins are composed of sphingosine,a fatty acid,phosphoric acid,and

Accepted Answer

A) choline. 
B) glucose. 
C) galactose. 
D) inositol. 
E) none of the above 
A) choline. 
B) glucose. 
C) galactose. 
D) inositol. 
E) none of the above

Question 10

Match the following.
-simple diffusion

Accepted Answer

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

Question 11

The molecule shown can be classified as a(an)

Accepted Answer

A) steroid. 
B) eicosanoid. 
C) wax. 
D) glycerophospholipid. 
E) sphingolipid. 
A) steroid. 
B) eicosanoid. 
C) wax. 
D) glycerophospholipid. 
E) sphingolipid.

Question 12

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 13

Match the following.
-hydrophilic

Accepted Answer

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

Question 14

Phospholipids differ from fats and oils by having

Accepted Answer

A) one of the fatty acid ester linkages replaced by a phosphate ester linkage. 
B) one of the fatty acid ester linkages replaced by an amine group. 
C) cyclic ester structures instead of the three-carbon backbone. 
D) a molecule of glucose bonded to the three-carbon backbone. 
E) a molecule of galactose bonded to the three-carbon backbone. 
A) one of the fatty acid ester linkages replaced by a phosphate ester linkage. 
B) one of the fatty acid ester linkages replaced by an amine group. 
C) cyclic ester structures instead of the three-carbon backbone. 
D) a molecule of glucose bonded to the three-carbon backbone. 
E) a molecule of galactose bonded to the three-carbon backbone.

Question 15

Unsaturated triacylglycerols are usually ________ because ________.

Accepted Answer

A) liquids; they have relatively short fatty acid chains 
B) liquids; the kinks in their fatty acid chains prevent their fitting together closely 
C) liquids; they contain impurities from their natural sources 
D) solids; they have relatively long fatty acid chains 
E) solids; the similar zig-zag shape of their fatty acid chains allows them to fit together closely 
A) liquids; they have relatively short fatty acid chains 
B) liquids; the kinks in their fatty acid chains prevent their fitting together closely 
C) liquids; they contain impurities from their natural sources 
D) solids; they have relatively long fatty acid chains 
E) solids; the similar zig-zag shape of their fatty acid chains allows them to fit together closely

Question 16

The process of transport across cell membranes which costs biochemical energy is

Accepted Answer

A) simple diffusion. 
B) facilitated diffusion. 
C) active transport. 
D) osmosis. 
E) none of the above 
A) simple diffusion. 
B) facilitated diffusion. 
C) active transport. 
D) osmosis. 
E) none of the above

Question 17

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 18

The function of glycoproteins and glycolipids in cell membranes is to

Accepted Answer

A) vary the fluidity of the membrane as needed. 
B) mediate interactions between the cell and outside agents. 
C) provide channels for facilitated diffusion. 
D) provide channels for active transport. 
E) act as energy sources for active transport. 
A) vary the fluidity of the membrane as needed. 
B) mediate interactions between the cell and outside agents. 
C) provide channels for facilitated diffusion. 
D) provide channels for active transport. 
E) act as energy sources for active transport.

Question 19

Compare the three mechanisms for moving materials across cell membranes.Be sure to mention gradients,energy considerations,actual method of transport,and types of materials transported in your answer.

Accepted Answer

The answer of Compare the three mechanisms for moving materials...

Question 20

The product of an esterification reaction between which of the following molecules would be a fat?
I.CH3(CH2)14COOH
II.CH3(CH2)7CH=CH(CH2)7COOH
III.HOCH2CH2OH
IV.HOCH2CH(OH)CH2OH

Accepted Answer

A) I and IV 
B) II and III 
C) II and IV 
D) I and III 
E) I and II 
A) I and IV 
B) II and III 
C) II and IV 
D) I and III 
E) I and II

Exam 23: Lipids

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

Biomolecules can be classified as lipids on the basis of

Which substance will not be transported into a cell by simple diffusion?

Describe the similarities and differences between soaps and emulsifying agents.

Match the following. -polyunsaturated

Which molecule is a saturated fatty acid?

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

The product of an esterification reaction between which of the following molecules would be an oil? I.CH3 (CH2)14COOH II.CH3 (CH2)7CHCH(CH2)7COOH III.HOCH2CH2OH IV.HOCH2CH(OH)CH2OH

Sphingomyelins are composed of sphingosine,a fatty acid,phosphoric acid,and

Match the following. -simple diffusion

The molecule shown can be classified as a(an)

The biochemical roles of lipids are

Match the following. -hydrophilic

Phospholipids differ from fats and oils by having

Unsaturated triacylglycerols are usually ________ because ________.

The process of transport across cell membranes which costs biochemical energy is

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

The function of glycoproteins and glycolipids in cell membranes is to

Compare the three mechanisms for moving materials across cell membranes.Be sure to mention gradients,energy considerations,actual method of transport,and types of materials transported in your answer.

The product of an esterification reaction between which of the following molecules would be a fat? I.CH3(CH2)14COOH II.CH3(CH2)7CH=CH(CH2)7COOH III.HOCH2CH2OH IV.HOCH2CH(OH)CH2OH

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

Amines

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Amino Acids and Proteins

Enzymes and Vitamins

The Generation of Biochemical Energy

Carbohydrates

Carbohydrate Metabolism

Lipid Metabolism

Nucleic Acids and Protein Synthesis

Genomics

Protein and Amino Acid Metabolism

Chemical Messengers: Hormones, neurotransmitters, and Drugs

Body Fluids

Filters

The product of an esterification reaction between which of the following molecules would be an oil? I.CH₃ (CH₂)₁₄COOH II.CH₃ (CH₂)₇CHCH(CH₂)₇COOH III.HOCH₂CH₂OH IV.HOCH₂CH(OH)CH₂OH

Unsaturated triacylglycerols are usually because .

The product of an esterification reaction between which of the following molecules would be a fat? I.CH₃(CH₂)₁₄COOH II.CH₃(CH₂)₇CH=CH(CH₂)₇COOH III.HOCH₂CH₂OH IV.HOCH₂CH(OH)CH₂OH