Question 1

Which eicosanoids produced by white blood cells can cause bronchial constriction?

Accepted Answer

A) prostaglandins 
B) fatty acids 
C) bile salts 
D) leukotrienes 
E) steroids 
A) prostaglandins 
B) fatty acids 
C) bile salts 
D) leukotrienes 
E) steroids

Question 2

Which of the following is the reverse of an esterification reaction?

Accepted Answer

A) reduction of an ester 
B) oxidation of an ester 
C) neutralization of an ester 
D) hydrolysis of an ester 
E) hydrogenation of an ester 
A) reduction of an ester 
B) oxidation of an ester 
C) neutralization of an ester 
D) hydrolysis of an ester 
E) hydrogenation of an ester

Question 3

Cyclooxygenase catalyzes the conversion of arachidonic acid into PGH2.What drug inhibits this enzyme?

Accepted Answer

A) lactaid 
B) aspirin 
C) progesterone 
D) norlutin 
E) cortisone 
A) lactaid 
B) aspirin 
C) progesterone 
D) norlutin 
E) cortisone

Question 4

What is the product that results upon complete hydrogenation of the fatty acid shown?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 5

Unsaturated fatty acids contain only single bonds in their hydrocarbon chains.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following fatty acids would be classified as an omega-6 fatty acid?

Accepted Answer

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

Question 7

Which of the following statements concerning lipid functions is NOT true?

Accepted Answer

A) The human body uses triglycerides for long-term energy storage,insulation,and protection. 
B) Plants and animals use waxes as water barriers. 
C) Phosphoglycerides are key components of the structure of cell membranes. 
D) Steroids function as messenger molecules that enable cell-cell communication. 
E) All statements concerning lipid functions are true. 
A) The human body uses triglycerides for long-term energy storage,insulation,and protection. 
B) Plants and animals use waxes as water barriers. 
C) Phosphoglycerides are key components of the structure of cell membranes. 
D) Steroids function as messenger molecules that enable cell-cell communication. 
E) All statements concerning lipid functions are true.

Question 8

Fatty acids react with long chain alcohols to produce waxes.

Accepted Answer

A) True 
 B)False

Question 9

The cell membrane controls the flow of metabolites into and out of a cell.

Accepted Answer

A) True 
 B)False

Question 10

When palmitic acid,a 16-carbon saturated fatty acid,reacts with a 30-carbon unbranched alcohol,a wax is formed.What is the structure of this wax?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 11

Which steroid is used in the treatment of rheumatoid arthritis,asthma,and many skin conditions?

Accepted Answer

A) testosterone 
B) cortisone 
C) digitoxin 
D) cholesterol 
E) stanozolol 
A) testosterone 
B) cortisone 
C) digitoxin 
D) cholesterol 
E) stanozolol

Question 12

What is the starting material for the synthesis of steroids in the body?

Accepted Answer

A) glucose 
B) testosterone 
C) stearic acid 
D) cholate 
E) cholesterol 
A) glucose 
B) testosterone 
C) stearic acid 
D) cholate 
E) cholesterol

Question 13

Which class of lipoprotein is bound to plasma cholesterol and transports it from the peripheral tissues to the liver?

Accepted Answer

A) chylomicrons 
B) high density lipoproteins (HDL) 
C) low density lipoproteins (LDL) 
D) very low density lipoproteins (VLDL) 
E) sphingomyelins 
A) chylomicrons 
B) high density lipoproteins (HDL) 
C) low density lipoproteins (LDL) 
D) very low density lipoproteins (VLDL) 
E) sphingomyelins

Question 14

High levels of one class of human plasma lipoprotein are thought to reduce the incidence of atherosclerosis.Which class is this?

Accepted Answer

A) chylomicrons 
B) VLDL 
C) LDL 
D) HDL 
E) cholinesterases 
A) chylomicrons 
B) VLDL 
C) LDL 
D) HDL 
E) cholinesterases

Question 15

What highly unsaturated fatty acid and precursor to many prostaglandins,is synthesized from the fatty acid linoleic acid in the body?

Accepted Answer

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

Question 16

What response is caused by the prostaglandins produced in the kidneys?

Accepted Answer

A) stimulation of ovulation 
B) smooth muscle contractions 
C) dilation of renal blood vessels 
D) constriction of blood vessels and aggregation of platelets 
E) water retention and weight gain 
A) stimulation of ovulation 
B) smooth muscle contractions 
C) dilation of renal blood vessels 
D) constriction of blood vessels and aggregation of platelets 
E) water retention and weight gain

Question 17

Bile salts are classified as steroids.

Accepted Answer

A) True 
 B)False

Question 18

Fatty acids generally contain how many carbon atoms?

Accepted Answer

A) 12 
B) 8 
C) 6 
D) an odd number 
E) an even number 
A) 12 
B) 8 
C) 6 
D) an odd number 
E) an even number

Question 19

Which steroid is responsible for both the successful initiation and completion of pregnancy?

Accepted Answer

A) cholesterol 
B) sphingosine 
C) chylomicron 
D) progesterone 
E) cortisone 
A) cholesterol 
B) sphingosine 
C) chylomicron 
D) progesterone 
E) cortisone

Question 20

Which type of lipid always contains the carbon skeleton structure shown?

Accepted Answer

A) lipoproteins 
B) glycerides 
C) phospholipids 
D) sphingolipids 
E) steroids 
A) lipoproteins 
B) glycerides 
C) phospholipids 
D) sphingolipids 
E) steroids

Exam 17: Lipids and Their Functions in Biochemical Systems

Which eicosanoids produced by white blood cells can cause bronchial constriction?

Which of the following is the reverse of an esterification reaction?

Cyclooxygenase catalyzes the conversion of arachidonic acid into PGH2.What drug inhibits this enzyme?

What is the product that results upon complete hydrogenation of the fatty acid shown?

Unsaturated fatty acids contain only single bonds in their hydrocarbon chains.

Which of the following fatty acids would be classified as an omega-6 fatty acid?

Which of the following statements concerning lipid functions is NOT true?

Fatty acids react with long chain alcohols to produce waxes.

The cell membrane controls the flow of metabolites into and out of a cell.

When palmitic acid,a 16-carbon saturated fatty acid,reacts with a 30-carbon unbranched alcohol,a wax is formed.What is the structure of this wax?

Which steroid is used in the treatment of rheumatoid arthritis,asthma,and many skin conditions?

What is the starting material for the synthesis of steroids in the body?

Which class of lipoprotein is bound to plasma cholesterol and transports it from the peripheral tissues to the liver?

High levels of one class of human plasma lipoprotein are thought to reduce the incidence of atherosclerosis.Which class is this?

What highly unsaturated fatty acid and precursor to many prostaglandins,is synthesized from the fatty acid linoleic acid in the body?

What response is caused by the prostaglandins produced in the kidneys?

Bile salts are classified as steroids.

Fatty acids generally contain how many carbon atoms?

Which steroid is responsible for both the successful initiation and completion of pregnancy?

Which type of lipid always contains the carbon skeleton structure shown?

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

Cyclooxygenase catalyzes the conversion of arachidonic acid into PGH₂.What drug inhibits this enzyme?