Question 1

Based on the structure of its side chains,the amino acid shown below can be classified as

Accepted Answer

A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar. 
A) acidic. 
B) basic. 
C) neutral,non-polar. 
D) neutral,polar.

Question 2

Which of the following amino acids contains a sulfur in its side chain?

Accepted Answer

A) aspartic acid 
B) glycine 
C) cysteine 
D) arginine 
A) aspartic acid 
B) glycine 
C) cysteine 
D) arginine

Question 3

Which class of hydrocarbons has the general formula CnH2n+2?

Accepted Answer

A) alkanes 
B) alkenes 
C) alkynes 
D) cylcloalkanes 
A) alkanes 
B) alkenes 
C) alkynes 
D) cylcloalkanes

Question 4

Which of the following compounds is 5-ethyl-4-isopropyl-2-methylnonane?

Accepted Answer

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

Question 5

Shown are ball-and-stick (1)and space-filling (2)models of methane.  
-What is the H-C-H bond angle?

Accepted Answer

A) 90° 
B) 109.5° 
C) 120° 
D) 180° 
A) 90° 
B) 109.5° 
C) 120° 
D) 180°

Question 6

Identify the amino acid shown below.

Accepted Answer

A) Methionine (Met) 
B) Phenylalanine (Phe) 
C) Proline (Pro) 
D) Tryptophan (Trp) 
A) Methionine (Met) 
B) Phenylalanine (Phe) 
C) Proline (Pro) 
D) Tryptophan (Trp)

Question 7

Which ending on a ketone or aldehyde indicates a sugar?

Accepted Answer

A) -ene 
B) -one 
C) ether 
D) -ose 
A) -ene 
B) -one 
C) ether 
D) -ose

Question 8

The human body is thought to contain ________ different kinds of proteins.

Accepted Answer

A) 90,000 
B) 150,000 
C) 200,000 
D) 110,000 
A) 90,000 
B) 150,000 
C) 200,000 
D) 110,000

Question 9

Which one of the following contains a polar carbonyl group,C=O?

Accepted Answer

A) a carboxylic acid 
B) an alkyne 
C) an amine 
D) an alkane 
A) a carboxylic acid 
B) an alkyne 
C) an amine 
D) an alkane

Question 10

Identify the amino acid shown below.

Accepted Answer

A) Asparagine (Asn) 
B) Aspartic acid (Asp) 
C) Glutamic acid (Glu) 
D) Glutamine (Gln) 
A) Asparagine (Asn) 
B) Aspartic acid (Asp) 
C) Glutamic acid (Glu) 
D) Glutamine (Gln)

Question 11

How many isomers exist for C5H12? Of these isomers,how many are straight-chain isomers and how many are branched isomers?

Accepted Answer

Question 12

When crystallized,which form of glucose predominates?

Accepted Answer

A) cyclic α 
B) cyclic β 
C) open chain 
D) All three are equal in crystals. 
A) cyclic α 
B) cyclic β 
C) open chain 
D) All three are equal in crystals.

Question 13

In organic molecules the molecular geometry exhibited by carbon is ________ when carbon is bonded to four atoms by four single bonds,________ when carbon is bonded to three atoms by one double bond and two single bonds,and ________ when carbon is bonded to two atoms by one triple bond and one single bond.

Accepted Answer

tetrahedra

Question 14

Which statement below regarding fatty acids is not correct? Fatty acids

Accepted Answer

A) are always liquids. 
B) are long chain carboxylic acids. 
C) are usually unbranched chains. 
D) usually have an even number of carbon atoms. 
A) are always liquids. 
B) are long chain carboxylic acids. 
C) are usually unbranched chains. 
D) usually have an even number of carbon atoms.

Question 15

Which of the following statements about isomers is false?

Accepted Answer

A) All alkanes have branched chain isomers. 
B) As the number of carbon atoms increase in a compound,so do the number of possible isomers. 
C) Isomers have different physical properties. 
D) Isomers have the same formula but different molecular structures. 
A) All alkanes have branched chain isomers. 
B) As the number of carbon atoms increase in a compound,so do the number of possible isomers. 
C) Isomers have different physical properties. 
D) Isomers have the same formula but different molecular structures.

Question 16

What class of compounds are cyclic?

Accepted Answer

A) amino acids 
B) lipids 
C) monosaccharides 
D) proteins 
A) amino acids 
B) lipids 
C) monosaccharides 
D) proteins

Question 17

What is the IUPAC name for the following compound?

Accepted Answer

A) heptane 
B) 3,3-dimethylpentane 
C) 2,2-dimethyl-2-ethylpropane 
D) 2,2-diethylpropane 
A) heptane 
B) 3,3-dimethylpentane 
C) 2,2-dimethyl-2-ethylpropane 
D) 2,2-diethylpropane

Question 18

When alkanes react with chlorine in the presence of ultraviolet light,chlorine atoms substitute for one or more alkane hydrogen atoms.What is the number of different chloroalkane compounds that can be formed by the reaction of C2H6 with chlorine?

Accepted Answer

A) 3 
B) 6 
C) 9 
D) 12 
A) 3 
B) 6 
C) 9 
D) 12

Question 19

Which of the following is a correct name for an alkyne?

Accepted Answer

A) 3-methyl-2-octyne 
B) 8-methyl-3-octyne 
C) 2,2-dimethyl-4-pentyne 
D) 3,3-dimethyl-1-heptyne 
A) 3-methyl-2-octyne 
B) 8-methyl-3-octyne 
C) 2,2-dimethyl-4-pentyne 
D) 3,3-dimethyl-1-heptyne

Question 20

Linoleic acid,a fatty acid,contains ________ carbons and ________ double bonds.

Accepted Answer

The answer of Linoleic acid,a fatty acid,contains ________ carbons and...

Exam 23: Connections to Organic and Biological Chemistry

Based on the structure of its side chains,the amino acid shown below can be classified as

Which of the following amino acids contains a sulfur in its side chain?

Which class of hydrocarbons has the general formula CnH2n+2?

Which of the following compounds is 5-ethyl-4-isopropyl-2-methylnonane?

Shown are ball-and-stick (1)and space-filling (2)models of methane. -What is the H-C-H bond angle?

Identify the amino acid shown below.

Which ending on a ketone or aldehyde indicates a sugar?

The human body is thought to contain ________ different kinds of proteins.

Which one of the following contains a polar carbonyl group,C=O?

Identify the amino acid shown below.

How many isomers exist for C5H12? Of these isomers,how many are straight-chain isomers and how many are branched isomers?

When crystallized,which form of glucose predominates?

Which statement below regarding fatty acids is not correct? Fatty acids

Which of the following statements about isomers is false?

What class of compounds are cyclic?

What is the IUPAC name for the following compound?

When alkanes react with chlorine in the presence of ultraviolet light,chlorine atoms substitute for one or more alkane hydrogen atoms.What is the number of different chloroalkane compounds that can be formed by the reaction of C2H6 with chlorine?

Which of the following is a correct name for an alkyne?

Linoleic acid,a fatty acid,contains ________ carbons and ________ double bonds.

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Filters

Which class of hydrocarbons has the general formula C_nH_2n+2?

How many isomers exist for C₅H₁₂? Of these isomers,how many are straight-chain isomers and how many are branched isomers?

When alkanes react with chlorine in the presence of ultraviolet light,chlorine atoms substitute for one or more alkane hydrogen atoms.What is the number of different chloroalkane compounds that can be formed by the reaction of C₂H₆ with chlorine?

Linoleic acid,a fatty acid,contains carbons and double bonds.