Question 1

Which of the following fatty acids is unsaturated?

Accepted Answer

A) palmitic acid 
B) oleic acid 
C) myristic acid 
D) stearic acid 
A) palmitic acid 
B) oleic acid 
C) myristic acid 
D) stearic acid

Question 2

A glycerol ester of unsaturated fatty acids best describes a(n):

Accepted Answer

A) vegetable oil 
B) vegetable starch 
C) animal fat 
D) lipid 
E) wax 
A) vegetable oil 
B) vegetable starch 
C) animal fat 
D) lipid 
E) wax

Question 3

Which of the following compounds may display the property of optical isomerism?

Accepted Answer

A) 3-pentanol 
B) 2-pentene 
C) 2-bromopropane 
D) 2-bromobutane 
E) acetone 
A) 3-pentanol 
B) 2-pentene 
C) 2-bromopropane 
D) 2-bromobutane 
E) acetone

Question 4

Predict the isoelectric point for tyrosine,4-OHC6H4CH2CH(NH2)CO2H,given pKa1 = 2.2 and pKa2 = 9.1.

Accepted Answer

A) 5.7 
B) 6.9 
C) 11.3 
D) 7.0 
A) 5.7 
B) 6.9 
C) 11.3 
D) 7.0

Question 5

DNA contains the sugar ribose.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following represents an INCORRECT breakdown sequence for that food?

Accepted Answer

A) carbohydrates - polysaccharides - coenzyme A 
B) starch - maltose and dextrins - maltose - glucose 
C) protein - polypeptides - small peptides - amino acids 
D) fats and oils - glycerol,glycerides,and fatty acids - fatty acids to CO2 and water 
E) fats and oils - glycerol,glycerides,and fatty acids - glycerol to triose phosphate 
A) carbohydrates - polysaccharides - coenzyme A 
B) starch - maltose and dextrins - maltose - glucose 
C) protein - polypeptides - small peptides - amino acids 
D) fats and oils - glycerol,glycerides,and fatty acids - fatty acids to CO2 and water 
E) fats and oils - glycerol,glycerides,and fatty acids - glycerol to triose phosphate

Question 7

Choose the INCORRECT statement.

Accepted Answer

A) Glycogen is the main structural material of plants. 
B) Carbohydrates are produced in plants by the photosynthesis reaction. 
C) Oligosaccharides contain 2 to 10 monosaccharide units. 
D) Polysaccharides contain more than 10 monosaccharide units. 
E) Monosaccharides contain one saccharide unit. 
A) Glycogen is the main structural material of plants. 
B) Carbohydrates are produced in plants by the photosynthesis reaction. 
C) Oligosaccharides contain 2 to 10 monosaccharide units. 
D) Polysaccharides contain more than 10 monosaccharide units. 
E) Monosaccharides contain one saccharide unit.

Question 8

Choose the INCORRECT statement.

Accepted Answer

A) Two molecules that are nonsuperimposable mirror images of one another are optical isomers. 
B) Enantiomers are molecules that are mirror images of one another which are superimposable. 
C) A dextrorotatory isomer rotates plane polarized light to the right. 
D) Optical isomers generally have one carbon with 4 different groups attached to it. 
E) A carbon atom with 4 different groups attached to it is called a chiral center. 
A) Two molecules that are nonsuperimposable mirror images of one another are optical isomers. 
B) Enantiomers are molecules that are mirror images of one another which are superimposable. 
C) A dextrorotatory isomer rotates plane polarized light to the right. 
D) Optical isomers generally have one carbon with 4 different groups attached to it. 
E) A carbon atom with 4 different groups attached to it is called a chiral center.

Question 9

Choose the INCORRECT statement.

Accepted Answer

A) A levorotatory isomer rotates plane polarized light to the left. 
B) A chiral atom is said to be asymmetric. 
C) The absolute configuration is the arrangement of atoms as determined by X-ray studies. 
D) Molecules that are optically active isomers but not mirror images are diastereomers. 
E) Enantiomer properties differ only in the direction they rotate plane polarized light. 
A) A levorotatory isomer rotates plane polarized light to the left. 
B) A chiral atom is said to be asymmetric. 
C) The absolute configuration is the arrangement of atoms as determined by X-ray studies. 
D) Molecules that are optically active isomers but not mirror images are diastereomers. 
E) Enantiomer properties differ only in the direction they rotate plane polarized light.

Question 10

Glycine is a(n):

Accepted Answer

A) nucleic acid 
B) optically active compound 
C) carbohydrate 
D) amino acid 
E) lipid 
A) nucleic acid 
B) optically active compound 
C) carbohydrate 
D) amino acid 
E) lipid

Question 11

Saponification of 1 mole of glyceryl dibutyrooleate with excess potassium hydroxide would yield which of the following products?

Accepted Answer

A) 2 moles of potassium butyrate,1 mole of potassium oleate 
B) 1 mole of glycerol,1 mole of potassium oleate,2 moles of potassium butyrate 
C) 2 moles of potassium butyrate 
D) 1 mole of glycerol,2 moles of butyraldehyde,1 mole of olealdehyde 
E) 1 mole of glycerol,1 mole of potassium decanoate,2 moles of potassium butyrate 
A) 2 moles of potassium butyrate,1 mole of potassium oleate 
B) 1 mole of glycerol,1 mole of potassium oleate,2 moles of potassium butyrate 
C) 2 moles of potassium butyrate 
D) 1 mole of glycerol,2 moles of butyraldehyde,1 mole of olealdehyde 
E) 1 mole of glycerol,1 mole of potassium decanoate,2 moles of potassium butyrate

Question 12

The artificial sweetener Nutrasweet(aspartame)is not a derivative of sugar,but is actually a small dipeptide.What two amino acids make up the basic structure of Nutrasweet?

Accepted Answer

A) glutamic acid and phenylalanine 
B) asparagine and tyrosine 
C) aspartic acid and phenylalanine 
D) serine and glycine 
E) aspartic acid and tryptophan 
A) glutamic acid and phenylalanine 
B) asparagine and tyrosine 
C) aspartic acid and phenylalanine 
D) serine and glycine 
E) aspartic acid and tryptophan

Question 13

Choose the INCORRECT statement.

Accepted Answer

A) Tissues are the fundamental unit of all life. 
B) Tissues group into organs. 
C) Organs combine into organ systems. 
D) A nucleus,mitochondria,and chloroplasts are components of cells. 
E) Living tissue is synthesized from simple precursors: N2,H2O,CO2. 
A) Tissues are the fundamental unit of all life. 
B) Tissues group into organs. 
C) Organs combine into organ systems. 
D) A nucleus,mitochondria,and chloroplasts are components of cells. 
E) Living tissue is synthesized from simple precursors: N2,H2O,CO2.

Question 14

What is the complementary base sequence that corresponds to the following sequence of DNA bases?
TCGAGTTG

Accepted Answer

The answer of What is the complementary base sequence that...

Question 15

Enantiomers have the same chemical and physical properties.

Accepted Answer

A) True 
 B)False

Question 16

Choose the INCORRECT statement.

Accepted Answer

A) Proteins make up the bulk of the body's nonskeletal structure. 
B) Enzymes are carbohydrates which speed up reactions. 
C) Except glycine,naturally occurring amino acids are optically active. 
D) Essential amino acids are necessary for proper health and growth. 
E) Essential amino acids must be ingested through foods because the body is unable to synthesize them. 
A) Proteins make up the bulk of the body's nonskeletal structure. 
B) Enzymes are carbohydrates which speed up reactions. 
C) Except glycine,naturally occurring amino acids are optically active. 
D) Essential amino acids are necessary for proper health and growth. 
E) Essential amino acids must be ingested through foods because the body is unable to synthesize them.

Question 17

The fundamental agents involved in energy transfer are adenosine diphosphate (ADP)and adenosine triphosphate(ATP).

Accepted Answer

A) True 
 B)False

Question 18

Many insecticides contain compounds which inhibit the enzyme acetylcholine esterase which is essential for respiration and other vital functions in insects.These compounds exert their inhibitory effects by covalently bonding to active site amino acid side chains.What would be the most likely explanation for the inhibitory effects of these compounds?

Accepted Answer

A) Bonding of these compounds denatures the enzyme disrupting its secondary and tertiary structure. 
B) Bonding changes the primary structure of the enzyme profoundly affecting the activity of the enzyme. 
C) These compounds compete for the active site of the enzyme where they bind covalently and block the subsequent binding of substrate molecules. 
D) Covalent bonding of these compounds changes the pI of the enzyme which causes it to become less soluble and precipitate. 
E) Bonding of these compounds raises the activation energy of the reaction catalyzed by the enzyme. 
A) Bonding of these compounds denatures the enzyme disrupting its secondary and tertiary structure. 
B) Bonding changes the primary structure of the enzyme profoundly affecting the activity of the enzyme. 
C) These compounds compete for the active site of the enzyme where they bind covalently and block the subsequent binding of substrate molecules. 
D) Covalent bonding of these compounds changes the pI of the enzyme which causes it to become less soluble and precipitate. 
E) Bonding of these compounds raises the activation energy of the reaction catalyzed by the enzyme.

Question 19

Find a mismatch in the following body part - food metabolism pairs:

Accepted Answer

A) mouth - starch 
B) small intestine - polysaccharides 
C) small intestine - fats and oils 
D) stomach - proteins 
E) stomach - small peptides 
A) mouth - starch 
B) small intestine - polysaccharides 
C) small intestine - fats and oils 
D) stomach - proteins 
E) stomach - small peptides

Question 20

What is the name of the following tripeptide (the names of each amino acid are given directly below its position in the tripeptide)?

Accepted Answer

A) lysylserylaspartate 
B) aspartylserinyllysine 
C) aspartyllysinylserine 
D) aspartineserinelysine 
E) aspartylseryllysine 
A) lysylserylaspartate 
B) aspartylserinyllysine 
C) aspartyllysinylserine 
D) aspartineserinelysine 
E) aspartylseryllysine

Exam 28: Chemistry of the Living State

Which of the following fatty acids is unsaturated?

A glycerol ester of unsaturated fatty acids best describes a(n):

Which of the following compounds may display the property of optical isomerism?

Predict the isoelectric point for tyrosine,4-OHC6H4CH2CH(NH2)CO2H,given pKa1 = 2.2 and pKa2 = 9.1.

DNA contains the sugar ribose.

Which of the following represents an INCORRECT breakdown sequence for that food?

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Choose the INCORRECT statement.

Glycine is a(n):

Saponification of 1 mole of glyceryl dibutyrooleate with excess potassium hydroxide would yield which of the following products?

The artificial sweetener Nutrasweet(aspartame)is not a derivative of sugar,but is actually a small dipeptide.What two amino acids make up the basic structure of Nutrasweet?

Choose the INCORRECT statement.

What is the complementary base sequence that corresponds to the following sequence of DNA bases? TCGAGTTG

Enantiomers have the same chemical and physical properties.

Choose the INCORRECT statement.

The fundamental agents involved in energy transfer are adenosine diphosphate (ADP)and adenosine triphosphate(ATP).

Find a mismatch in the following body part - food metabolism pairs:

What is the name of the following tripeptide (the names of each amino acid are given directly below its position in the tripeptide)?

Matter: Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Valence Bond and Molecular Orbital Theories

Intermolecular Forces: Liquids and Solids

Spontaneous Change: Entropy and Gibbs Energy

Solutions and Their Physical Properties

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acidbase Equilibria

Solubility and Complex-Ion Equilibria

Electrochemistry

Chemical Kinetics

Chemistry of the Main-Group Elements I: Groups 1,2,13,and 14

Chemistry of the Main-Group Elements Ii: Groups 18,17,16,15,and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry

Structures of Organic Compounds

Reactions of Organic Compounds

Filters

Predict the isoelectric point for tyrosine,4-OHC₆H₄CH₂CH(NH₂)CO₂H,given pKa₁ = 2.2 and pKa₂ = 9.1.