Question 1

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 2

The chemical makeup of oils is

Accepted Answer

A) simple esters of long chain alcohols and fatty acids. 
B) esters of glycerol with three identical saturated fatty acids. 
C) esters of glycerol with three identical unsaturated fatty acids. 
D) esters of glycerol with three predominantly saturated fatty acids. 
E) esters of glycerol with three predominantly unsaturated fatty acids. 
A) simple esters of long chain alcohols and fatty acids. 
B) esters of glycerol with three identical saturated fatty acids. 
C) esters of glycerol with three identical unsaturated fatty acids. 
D) esters of glycerol with three predominantly saturated fatty acids. 
E) esters of glycerol with three predominantly unsaturated fatty acids.

Question 3

Describe the similarities and differences between soaps and emulsifying agents.

Accepted Answer

Both soaps and emulsifiers work in the s

Question 4

A protein which extends completely through the cell membrane is referred to as a(an)

Accepted Answer

A) liposome. 
B) integral protein. 
C) peripheral protein. 
D) glycoprotein. 
E) cholesterol. 
A) liposome. 
B) integral protein. 
C) peripheral protein. 
D) glycoprotein. 
E) cholesterol.

Question 5

The molecule shown can be classified as a

Accepted Answer

A) wax. 
B) glycerophospholipid. 
C) sphingolipid. 
D) glycolipid. 
E) triacylglycerol. 
A) wax. 
B) glycerophospholipid. 
C) sphingolipid. 
D) glycolipid. 
E) triacylglycerol.

Question 6

Match the following.
-saturated

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 7

Glycolipids are similar in structure to sphingomyelins,except that the phosphate group has been replaced by a(an)

Accepted Answer

A) choline derivative. 
B) carbohydrate. 
C) fatty acid. 
D) amino acid. 
E) nucleic acid. 
A) choline derivative. 
B) carbohydrate. 
C) fatty acid. 
D) amino acid. 
E) nucleic acid.

Question 8

Saturated triacylglycerols are usually ________ because ________.

Accepted Answer

A) liquids;they have relatively short fatty acid chains 
B) liquids;their rigid fatty acid chains do not fit together closely 
C) liquids;they contain impurities from their natural sources 
D) solids;they have relatively long fatty acid chains 
E) solids;their flexible fatty acid chains allow the molecules to fit together closely 
A) liquids;they have relatively short fatty acid chains 
B) liquids;their rigid fatty acid chains do not fit together closely 
C) liquids;they contain impurities from their natural sources 
D) solids;they have relatively long fatty acid chains 
E) solids;their flexible fatty acid chains allow the molecules to fit together closely

Question 9

Match the following.
-facilitated 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 10

Which molecule is a saturated fatty acid?

Accepted Answer

A) CH3(CH2)14COOH 
B) CH3(CH2)7CH=CH(CH2)7COOH 
C) CH3CH=CHCH2COOH 
D) (CH3)2CH(CH2)3COOH 
E) none of the above 
A) CH3(CH2)14COOH 
B) CH3(CH2)7CH=CH(CH2)7COOH 
C) CH3CH=CHCH2COOH 
D) (CH3)2CH(CH2)3COOH 
E) none of the above

Question 11

Which statement about cholesterol is not correct?

Accepted Answer

A) It is an essential component of cell membranes. 
B) It is the precursor for steroid hormones. 
C) It is the precursor for bile acids and salts. 
D) It cannot be synthesized by the body. 
E) It is soluble in non-polar solvents. 
A) It is an essential component of cell membranes. 
B) It is the precursor for steroid hormones. 
C) It is the precursor for bile acids and salts. 
D) It cannot be synthesized by the body. 
E) It is soluble in non-polar solvents.

Question 12

Substances originating in plant or animal material and soluble in non-polar organic solvents are classified as

Accepted Answer

A) carbohydrates. 
B) lipids. 
C) nucleic acids. 
D) proteins. 
E) amino acids. 
A) carbohydrates. 
B) lipids. 
C) nucleic acids. 
D) proteins. 
E) amino acids.

Question 13

Which choice is an example of a material that is transported across cell membranes by active transport?

Accepted Answer

A) cholesterol 
B) K+ 
C) glucose 
D) oxygen 
E) carbon dioxide 
A) cholesterol 
B) K+ 
C) glucose 
D) oxygen 
E) carbon dioxide

Question 14

Match the following.
-active transport

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 15

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 16

Fats 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 17

Soaps are

Accepted Answer

A) alkali metal salts of long chain carboxylic acids. 
B) long chain fatty alcohols. 
C) esters of a long chain fatty alcohol with a long chain fatty acid. 
D) alkali metal salts of glycerol. 
E) B and D 
A) alkali metal salts of long chain carboxylic acids. 
B) long chain fatty alcohols. 
C) esters of a long chain fatty alcohol with a long chain fatty acid. 
D) alkali metal salts of glycerol. 
E) B and D

Question 18

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 19

Sketch a lipid bilayer and identify its hydrophobic and hydrophilic portions.

Accepted Answer

OOOOOOOOOOOOOO hydrophilic
||

Question 20

Which molecule is an unsaturated fatty acid?

Accepted Answer

A) CH3(CH2)14COOH 
B) CH3(CH2)7CH=CH(CH2)7COOH 
C) CH3CH=CHCH2COOH 
D) (CH3)2CH(CH2)3COOH 
E) none of the above 
A) CH3(CH2)14COOH 
B) CH3(CH2)7CH=CH(CH2)7COOH 
C) CH3CH=CHCH2COOH 
D) (CH3)2CH(CH2)3COOH 
E) none of the above

Exam 23: Lipids

The molecule shown can be classified as a(an)

The chemical makeup of oils is

Describe the similarities and differences between soaps and emulsifying agents.

A protein which extends completely through the cell membrane is referred to as a(an)

The molecule shown can be classified as a

Match the following. -saturated

Glycolipids are similar in structure to sphingomyelins,except that the phosphate group has been replaced by a(an)

Saturated triacylglycerols are usually ________ because ________.

Match the following. -facilitated diffusion

Which molecule is a saturated fatty acid?

Which statement about cholesterol is not correct?

Substances originating in plant or animal material and soluble in non-polar organic solvents are classified as

Which choice is an example of a material that is transported across cell membranes by active transport?

Match the following. -active transport

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

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

Soaps are

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

Sketch a lipid bilayer and identify its hydrophobic and hydrophilic portions.

Which molecule is an unsaturated fatty acid?

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

Saturated triacylglycerols are usually because .

Fats are generally at room temperature and are obtained from .

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