Question 1

Aspirin and celecoxib act as anti-inflammatory agents by inactivating both the COX-1 and COX-2 enzymes.

Accepted Answer

A) True 
 B)False

Question 2

Which compound has the highest melting point?

Accepted Answer

A) CH3(CH2)14COOH 
B) CH3(CH2)10CH=CH(CH2)2COOH 
C) CH3(CH2)2CH=CH(CH2)4CH=CH(CH2)4COOH 
D) CH3(CH2)2CH=CH(CH2)2CH=CH(CH2)2CH=CH(CH2)2COOH 
A) CH3(CH2)14COOH 
B) CH3(CH2)10CH=CH(CH2)2COOH 
C) CH3(CH2)2CH=CH(CH2)4CH=CH(CH2)4COOH 
D) CH3(CH2)2CH=CH(CH2)2CH=CH(CH2)2CH=CH(CH2)2COOH

Question 3

Lipids are defined as biomolecules that contain fatty acids as part of their structure.

Accepted Answer

A) True 
 B)False

Question 4

Glycerol,shown below,is a component of triacylglycerols. In which solvent would glycerol be expected to have the greatest solubility?

Accepted Answer

A) Octane 
B) Benzene 
C) Hexane 
D) Water 
A) Octane 
B) Benzene 
C) Hexane 
D) Water

Question 5

The triacylglycerol shown below is expected to be a liquid at room temperature.

Accepted Answer

A) True 
 B)False

Question 6

Fats and oils are structurally both triacylglycerols,but fats are solids at room temperature and oils are liquids at room temperature. Which statement best describes the reason for their difference in physical state?

Accepted Answer

A) Fats are simple triacylglycerols and oils are mixed triacylglycerols. 
B) Oils are simple triacylglycerols and fats are mixed triacylglycerols. 
C) Oils contain longer fatty acid chains than fats do,and therefore have higher melting points than fats. 
D) Fats contain a higher percentage of saturated fatty acids than oils do,and therefore have higher melting points than oils. 
A) Fats are simple triacylglycerols and oils are mixed triacylglycerols. 
B) Oils are simple triacylglycerols and fats are mixed triacylglycerols. 
C) Oils contain longer fatty acid chains than fats do,and therefore have higher melting points than fats. 
D) Fats contain a higher percentage of saturated fatty acids than oils do,and therefore have higher melting points than oils.

Question 7

Simvastatin,also sold as Zocor (structure shown),is a drug used to reduce the level of cholesterol in the bloodstream. Which of the following functional groups is not present in simvastatin?

Accepted Answer

A) Ketone 
B) Ester 
C) Alcohol 
D) Alkene 
A) Ketone 
B) Ester 
C) Alcohol 
D) Alkene

Question 8

There are ten (10)tetrahedral carbons in Vitamin A (structure shown).

Accepted Answer

A) True 
 B)False

Question 9

There are twenty-one (21)tetrahedral carbons in Vitamin D4 (structure shown).

Accepted Answer

A) True 
 B)False

Question 10

What designation best describes linolenic acid,whose structure is shown below?

Accepted Answer

A) Omega-6 acid 
B) Omega-3 acid 
C) Omega-9 acid 
D) Omega-1 acid 
A) Omega-6 acid 
B) Omega-3 acid 
C) Omega-9 acid 
D) Omega-1 acid

Question 11

Fats contain a larger percentage of unsaturation in their structures than oils do.

Accepted Answer

A) True 
 B)False

Question 12

Two common types of phospholipids are ________ and ________.

Accepted Answer

phosphoacy

Question 13

Trans double bonds can be formed when triacylglycerols are partially hydrogenated.

Accepted Answer

A) True 
 B)False

Question 14

The block diagram for a phosphoacylglycerol (glycerophospholipid)is shown below. Phosphoacylglycerols can interact with both water and other lipids,and therefore are well suited for their role in the lipid bilayer of cell membranes. Which statement best explains this behavior?

Accepted Answer

A) They contain a phosphodiester. 
B) They contain both a hydrophobic region as well as a hydrophilic region. 
C) They contain both saturated fatty acids as well as unsaturated fatty acids. 
D) They contain both single bonds as well as double bonds. 
A) They contain a phosphodiester. 
B) They contain both a hydrophobic region as well as a hydrophilic region. 
C) They contain both saturated fatty acids as well as unsaturated fatty acids. 
D) They contain both single bonds as well as double bonds.

Question 15

What wax is formed from palmitic acid [CH3(CH2)14COOH] and the alcohol CH3(CH2)21OH?

Accepted Answer

A) CH3(CH2)21COO(CH2)14CH3 
B) CH3(CH2)14COO(CH2)14CH3 
C) CH3(CH2)14COO(CH2)21CH3 
D) CH3(CH2)21COO(CH2)21CH3 
A) CH3(CH2)21COO(CH2)14CH3 
B) CH3(CH2)14COO(CH2)14CH3 
C) CH3(CH2)14COO(CH2)21CH3 
D) CH3(CH2)21COO(CH2)21CH3

Question 16

There are six (6)trigonal planar carbons in Vitamin D4 (structure shown).

Accepted Answer

A) True 
 B)False

Question 17

Which compound has the lowest melting point?

Accepted Answer

A) CH3(CH2)18COOH 
B) CH3(CH2)5CH=CH(CH2)7COOH 
C) CH3(CH2)7CH=CH(CH2)7COOH 
D) CH3(CH2)4(CH=CHCH2)4(CH2)2COOH 
A) CH3(CH2)18COOH 
B) CH3(CH2)5CH=CH(CH2)7COOH 
C) CH3(CH2)7CH=CH(CH2)7COOH 
D) CH3(CH2)4(CH=CHCH2)4(CH2)2COOH

Question 18

The three-dimensional structure of a trans triacylglycerol shows its similarity to saturated triacylglycerols.

Accepted Answer

A) True 
 B)False

Question 19

A sphingomyelin has three nonpolar side chain tails and one polar head.

Accepted Answer

A) True 
 B)False

Question 20

Which is not a fat-soluble vitamin?

Accepted Answer

A) Vitamin A 
B) Vitamin C 
C) Vitamin E 
D) Vitamin K 
A) Vitamin A 
B) Vitamin C 
C) Vitamin E 
D) Vitamin K

Exam 19: Lipids

Aspirin and celecoxib act as anti-inflammatory agents by inactivating both the COX-1 and COX-2 enzymes.

Which compound has the highest melting point?

Lipids are defined as biomolecules that contain fatty acids as part of their structure.

Glycerol,shown below,is a component of triacylglycerols. In which solvent would glycerol be expected to have the greatest solubility?

The triacylglycerol shown below is expected to be a liquid at room temperature.

Fats and oils are structurally both triacylglycerols,but fats are solids at room temperature and oils are liquids at room temperature. Which statement best describes the reason for their difference in physical state?

Simvastatin,also sold as Zocor (structure shown),is a drug used to reduce the level of cholesterol in the bloodstream. Which of the following functional groups is not present in simvastatin?

There are ten (10)tetrahedral carbons in Vitamin A (structure shown).

There are twenty-one (21)tetrahedral carbons in Vitamin D4 (structure shown).

What designation best describes linolenic acid,whose structure is shown below?

Fats contain a larger percentage of unsaturation in their structures than oils do.

Two common types of phospholipids are ________ and ________.

Trans double bonds can be formed when triacylglycerols are partially hydrogenated.

The block diagram for a phosphoacylglycerol (glycerophospholipid)is shown below. Phosphoacylglycerols can interact with both water and other lipids,and therefore are well suited for their role in the lipid bilayer of cell membranes. Which statement best explains this behavior?

What wax is formed from palmitic acid [CH3(CH2)14COOH] and the alcohol CH3(CH2)21OH?

There are six (6)trigonal planar carbons in Vitamin D4 (structure shown).

Which compound has the lowest melting point?

The three-dimensional structure of a trans triacylglycerol shows its similarity to saturated triacylglycerols.

A sphingomyelin has three nonpolar side chain tails and one polar head.

Which is not a fat-soluble vitamin?

Matter and Measurement

Atoms and the Periodic Table

Ionic Compounds

Covalent Compounds

Chemical Reactions

Energy Changes,reaction Rates,and Equilibrium

Gases,liquids,and Solids

Solutions

Acids and Bases

Nuclear Chemistry

Introduction to Organic Molecules and Functional Groups

Alkanes

Unsaturated Hydrocarbons

Organic Compounds That Contain Oxygen,halogen,or Sulfur

The Three-Dimensional Shape of Molecules

Aldehydes and Ketones

Carboxylic Acids,esters,and Amides

Amines and Neurotransmitters

Carbohydrates

Amino Acids,proteins,and Enzymes

Nucleic Acids and Protein Synthesis

Metabolism and Energy Production

Carbohydrate,lipid,and Protein Metabolism

Filters

Two common types of phospholipids are and .

What wax is formed from palmitic acid [CH₃(CH₂)₁₄COOH] and the alcohol CH₃(CH₂)₂₁OH?