Question 1

Which of the following hormone-like molecules is NOT produced from arachidonic acid?

Accepted Answer

A) prostaglandins 
B) eicosanoids 
C) leukotrienes 
D) thromboxanes 
E) steroids 
A) prostaglandins 
B) eicosanoids 
C) leukotrienes 
D) thromboxanes 
E) steroids

Question 2

Which of the following is NOT classified as a type of eicosanoid?

Accepted Answer

A) steroids 
B) prostaglandins 
C) thromboxanes 
D) leukotrienes 
E) All are considered eicosanoids. 
A) steroids 
B) prostaglandins 
C) thromboxanes 
D) leukotrienes 
E) All are considered eicosanoids.

Question 3

What is the major energy storage form found in fat cells?

Accepted Answer

A) waxes 
B) phospholipids 
C) acetylcholines 
D) triglycerides 
E) low density lipids 
A) waxes 
B) phospholipids 
C) acetylcholines 
D) triglycerides 
E) low density lipids

Question 4

Which statement concerning lipids is FALSE?

Accepted Answer

A) Lipids are used as an energy source. 
B) Most of the energy stored in the body is in the form of lipids. 
C) Glycogen is the lipid used for storing energy. 
D) Lipids are stored in fat cells called adipocytes. 
E) Lipids release more than twice the energy of carbohydrates when oxidized. 
A) Lipids are used as an energy source. 
B) Most of the energy stored in the body is in the form of lipids. 
C) Glycogen is the lipid used for storing energy. 
D) Lipids are stored in fat cells called adipocytes. 
E) Lipids release more than twice the energy of carbohydrates when oxidized.

Question 5

What is another name for phosphatidylcholine?

Accepted Answer

A) phospholipid-D 
B) sphingosine 
C) cholinesterase 
D) lecithin 
E) chylomicron 
A) phospholipid-D 
B) sphingosine 
C) cholinesterase 
D) lecithin 
E) chylomicron

Question 6

Which of the following leads to an increase in the melting point of a fatty acid?

Accepted Answer

A) increase in the length of the carbon chain 
B) increase in the amount of unsaturation 
C) decrease in the number of hydrogen atoms per carbon atom 
D) All of the choices are correct. 
E) None of the choices are correct. 
A) increase in the length of the carbon chain 
B) increase in the amount of unsaturation 
C) decrease in the number of hydrogen atoms per carbon atom 
D) All of the choices are correct. 
E) None of the choices are correct.

Question 7

What process converts an unsaturated fatty acid into a saturated fatty acid?

Accepted Answer

A) oxidation 
B) combustion 
C) substitution 
D) hydrolysis 
E) hydrogenation 
A) oxidation 
B) combustion 
C) substitution 
D) hydrolysis 
E) hydrogenation

Question 8

Which of the following substances do not contribute to the structure of biological membranes?

Accepted Answer

A) phospholipids 
B) glycolipids 
C) cholesterol 
D) proteins 
E) cellulose 
A) phospholipids 
B) glycolipids 
C) cholesterol 
D) proteins 
E) cellulose

Question 9

What two fatty acids are essential fatty acids?

Accepted Answer

A) palmitoleic acid and oleic acid 
B) linoleic acid and stearic acid 
C) arachidonic acid and eicosanoids 
D) linolenic acid and linoleic acid 
E) stearic acid and oleic acid 
A) palmitoleic acid and oleic acid 
B) linoleic acid and stearic acid 
C) arachidonic acid and eicosanoids 
D) linolenic acid and linoleic acid 
E) stearic acid and oleic acid

Question 10

What products are formed from the complete hydrolysis of a triglyceride?

Accepted Answer

A) glycerol and 3 fatty acids 
B) glycerol and 2 fatty acids 
C) glycerol and 1 fatty acid 
D) All of the choices are correct. 
E) None of the choices are correct. 
A) glycerol and 3 fatty acids 
B) glycerol and 2 fatty acids 
C) glycerol and 1 fatty acid 
D) All of the choices are correct. 
E) None of the choices are correct.

Question 11

What type of fatty acid is represented by the formula CnH2nCOOH?

Accepted Answer

A) saturated fatty acid 
B) unsaturated fatty acid 
C) essential fatty acid 
D) nonessential fatty acid 
E) chiral fatty acid 
A) saturated fatty acid 
B) unsaturated fatty acid 
C) essential fatty acid 
D) nonessential fatty acid 
E) chiral fatty acid

Question 12

What is the most abundant class of membrane lipids?

Accepted Answer

A) prostaglandins 
B) triglycerides 
C) waxes 
D) phosphoglycerides 
E) eicosanoids 
A) prostaglandins 
B) triglycerides 
C) waxes 
D) phosphoglycerides 
E) eicosanoids

Question 13

Cetyl palmitate is a component of spermaceti wax,isolated from the heads of sperm whales,and used in cosmetics.In which solvent would cetyl palmitate be expected to have the greatest solubility?

Accepted Answer

A) acetic acid (CH3COOH) 
B) ethyl alcohol (CH3CH2OH) 
C) decane (CH3(CH2)6CH3) 
D) water 
E) 5% NaCl(aq) 
A) acetic acid (CH3COOH) 
B) ethyl alcohol (CH3CH2OH) 
C) decane (CH3(CH2)6CH3) 
D) water 
E) 5% NaCl(aq)

Question 14

Prostaglandins produced in the kidneys cause renal blood vessels to dilate.

Accepted Answer

A) True 
 B)False

Question 15

Glycolipids contain what type of compound joined to the lipid portion of the molecule?

Accepted Answer

A) protein 
B) enzyme 
C) vitamin 
D) carbohydrate 
E) amino acid 
A) protein 
B) enzyme 
C) vitamin 
D) carbohydrate 
E) amino acid

Question 16

Which statement best describes how lipids are defined?

Accepted Answer

A) Lipids are biomolecules that contain the ester functional group. 
B) Lipids are biomolecules that contain fatty acids. 
C) Lipids are biomolecules that have negative effects on a person's health. 
D) Lipids are biomolecules that are solids at room temperature. 
E) Lipids are structurally diverse biomolecules that are soluble in nonpolar solvents and insoluble in water. 
A) Lipids are biomolecules that contain the ester functional group. 
B) Lipids are biomolecules that contain fatty acids. 
C) Lipids are biomolecules that have negative effects on a person's health. 
D) Lipids are biomolecules that are solids at room temperature. 
E) Lipids are structurally diverse biomolecules that are soluble in nonpolar solvents and insoluble in water.

Question 17

What type of lipid is formed in the reaction between a long-chain alcohol and a fatty acid?

Accepted Answer

A) triglyceride 
B) oil 
C) steroid 
D) cholesterol 
E) wax 
A) triglyceride 
B) oil 
C) steroid 
D) cholesterol 
E) wax

Question 18

Which of the statements concerning the lipid bilayer of cell membranes is INCORRECT?

Accepted Answer

A) The lipid bilayer consists of two identical layers of phospholipids. 
B) The hydrophobic hydrocarbon tails are located in the interior of the bilayer. 
C) The ionic head groups of lipids are exposed on the exterior surface of the bilayer. 
D) The hydrocarbon tails provide a thin shell of nonpolar material that prevents mixing of molecules on both sides of the bilayer. 
E) Carbohydrate groups attached to the outer surface of the lipid bilayer participate in receptor and recognition functions. 
A) The lipid bilayer consists of two identical layers of phospholipids. 
B) The hydrophobic hydrocarbon tails are located in the interior of the bilayer. 
C) The ionic head groups of lipids are exposed on the exterior surface of the bilayer. 
D) The hydrocarbon tails provide a thin shell of nonpolar material that prevents mixing of molecules on both sides of the bilayer. 
E) Carbohydrate groups attached to the outer surface of the lipid bilayer participate in receptor and recognition functions.

Exam 17: Lipids and Their Functions in Biochemical Systems

Which of the following hormone-like molecules is NOT produced from arachidonic acid?

Which of the following is NOT classified as a type of eicosanoid?

What is the major energy storage form found in fat cells?

Which statement concerning lipids is FALSE?

What is another name for phosphatidylcholine?

Which of the following leads to an increase in the melting point of a fatty acid?

What process converts an unsaturated fatty acid into a saturated fatty acid?

Which of the following substances do not contribute to the structure of biological membranes?

What two fatty acids are essential fatty acids?

What products are formed from the complete hydrolysis of a triglyceride?

What type of fatty acid is represented by the formula CnH2nCOOH?

What is the most abundant class of membrane lipids?

Cetyl palmitate is a component of spermaceti wax,isolated from the heads of sperm whales,and used in cosmetics.In which solvent would cetyl palmitate be expected to have the greatest solubility?

Prostaglandins produced in the kidneys cause renal blood vessels to dilate.

Glycolipids contain what type of compound joined to the lipid portion of the molecule?

Which statement best describes how lipids are defined?

What type of lipid is formed in the reaction between a long-chain alcohol and a fatty acid?

Which of the statements concerning the lipid bilayer of cell membranes is INCORRECT?

Chemistry - Methods and Measurement

The Structure of the Atom and the Periodic Table

Structure and Properties of Ionic and Covalent Compounds

Calculations, chemical Changes, and the Chemical Equation

States of Matter: Gases, liquids, and Solids

Solutions

Energy,rate and Equilibrium

Acids and Bases

The Nucleus, radioactivity, and Nuclear Medicine

An Introduction to Organic Chemistry

The Unsaturated Hydrocarbons: Alkenes, alkynes, and Aromatics

Alcohols, phenols, thiols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Carboxylic Acid Derivatives

Amines and Amides

Carbohydrates

Protein Structure and Function

Enzymes

Introduction to Molecular Genetics

Carbohydrate Metabolism

Aerobic Respiration and Energy Production

Fatty Acid Metabolism

Filters

What type of fatty acid is represented by the formula C_nH_2nCOOH?