Question 1

In leu-ala-arg-val-tyr-his-pro-gln,the amino acid with the N-terminal is

Accepted Answer

A) gln. 
B) val. 
C) leu. 
D) tyr. 
A) gln. 
B) val. 
C) leu. 
D) tyr.

Question 2

The number of different monochloro substitution products (C5H11Cl)that can form from the reaction of 2-methylbutane with Cl2 is ________.

Accepted Answer

Question 3

Organic molecules containing only carbon and hydrogen and having only single bonds are called ________ hydrocarbons,or ________.

Accepted Answer

The answer of Organic molecules containing only carbon and hydrogen...

Question 4

Lipids are characterized by what property?

Accepted Answer

A) chemical reactivity 
B) chemical structure 
C) refractive index 
D) solubility 
A) chemical reactivity 
B) chemical structure 
C) refractive index 
D) solubility

Question 5

Which is the condensed structure of a straight-chain hydrocarbon?

Accepted Answer

A) I 
B) II 
C) III 
D) IV 
A) I 
B) II 
C) III 
D) IV

Question 6

Which amino acid has the simplest structure?

Accepted Answer

A) valine 
B) glycine 
C) asparagine 
D) arginine 
A) valine 
B) glycine 
C) asparagine 
D) arginine

Question 7

Which one of the following amino acids contains a hydrophobic side chain?

Accepted Answer

A) alanine 
B) asparagine 
C) cysteine 
D) glutamine 
A) alanine 
B) asparagine 
C) cysteine 
D) glutamine

Question 8

Which reaction is not characteristic of aromatic compounds?

Accepted Answer

A) aromatic ring has 4n pi electrons 
B) aromatic ring is planar 
C) aromatic ring has 4n + 2 pi electrons 
D) aromatic ring has p orbitals that overlap 
A) aromatic ring has 4n pi electrons 
B) aromatic ring is planar 
C) aromatic ring has 4n + 2 pi electrons 
D) aromatic ring has p orbitals that overlap

Question 9

What is the hybridization of the carbon in (CH3)2C*=CHC   N indicated by the asterisk (*)?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) dsp3 
A) sp 
B) sp2 
C) sp3 
D) dsp3

Question 10

In addition to an amine,which functional group do all amino acids contain?

Accepted Answer

A) an alcohol 
B) an amide 
C) a carboxylic acid 
D) an oxyacid 
A) an alcohol 
B) an amide 
C) a carboxylic acid 
D) an oxyacid

Question 11

Which of the following statements about cis-trans isomers is not correct?

Accepted Answer

A) Conversion between cis- and trans-isomers occurs easily by rotation around the double bond. 
B) In the trans- isomer,the groups of interest are on opposite sides across the double bond. 
C) In the cis- isomer,the groups of interest are on the same side of the double bond. 
D) There are no cis-trans isomers in alkynes. 
A) Conversion between cis- and trans-isomers occurs easily by rotation around the double bond. 
B) In the trans- isomer,the groups of interest are on opposite sides across the double bond. 
C) In the cis- isomer,the groups of interest are on the same side of the double bond. 
D) There are no cis-trans isomers in alkynes.

Question 12

How many distinct isomers can be drawn for a molecule of C4H8?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
A) 1 
B) 2 
C) 3 
D) 4

Question 13

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 14

In the protein,Val-Tyr-His-Pro,which amino acid contains the N-terminal group?

Accepted Answer

A) histidine 
B) proline 
C) tyrosine 
D) valine 
A) histidine 
B) proline 
C) tyrosine 
D) valine

Question 15

In the protein,Val-Tyr-His-Pro,which amino acid contains the N-terminal group?

Accepted Answer

A) histidine 
B) proline 
C) tyrosine 
D) valine 
A) histidine 
B) proline 
C) tyrosine 
D) valine

Question 16

In the protein,Asn-Phe-Cys-Lys,which amino acid contains the C-terminal group?

Accepted Answer

A) asparagine 
B) cysteine 
C) lysine 
D) phenylalanine 
A) asparagine 
B) cysteine 
C) lysine 
D) phenylalanine

Question 17

How many isomers are there for C5H12?

Accepted Answer

A) 3 
B) 4 
C) 5 
D) 6 
A) 3 
B) 4 
C) 5 
D) 6

Question 18

Another term for alkanes is

Accepted Answer

A) alkenes. 
B) alkynes. 
C) saturated hydrocarbons. 
D) unsaturated hydrocarbons. 
A) alkenes. 
B) alkynes. 
C) saturated hydrocarbons. 
D) unsaturated hydrocarbons.

Question 19

Shown are ball-and-stick (1)and space-filling (2)models of ethylene.  
-What hybrid orbitals are used by carbon to form covalent bonds with hydrogen?

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
A) sp 
B) sp2 
C) sp3 
D) sp3d

Question 20

Which of the compounds shown above is correctly identified by the name 2-methylbutane?

Accepted Answer

A) all are 2-methylbutane 
B) none 
C) only (1) 
D) only (1)and (4) 
A) all are 2-methylbutane 
B) none 
C) only (1) 
D) only (1)and (4)

Exam 23: Connections to Organic and Biological Chemistry

In leu-ala-arg-val-tyr-his-pro-gln,the amino acid with the N-terminal is

The number of different monochloro substitution products (C5H11Cl)that can form from the reaction of 2-methylbutane with Cl2 is ________.

Organic molecules containing only carbon and hydrogen and having only single bonds are called ________ hydrocarbons,or ________.

Lipids are characterized by what property?

Which is the condensed structure of a straight-chain hydrocarbon?

Which amino acid has the simplest structure?

Which one of the following amino acids contains a hydrophobic side chain?

Which reaction is not characteristic of aromatic compounds?

What is the hybridization of the carbon in (CH3)2C*=CHC N indicated by the asterisk (*)?

In addition to an amine,which functional group do all amino acids contain?

Which of the following statements about cis-trans isomers is not correct?

How many distinct isomers can be drawn for a molecule of C4H8?

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

In the protein,Val-Tyr-His-Pro,which amino acid contains the N-terminal group?

In the protein,Val-Tyr-His-Pro,which amino acid contains the N-terminal group?

In the protein,Asn-Phe-Cys-Lys,which amino acid contains the C-terminal group?

How many isomers are there for C5H12?

Another term for alkanes is

Shown are ball-and-stick (1)and space-filling (2)models of ethylene. -What hybrid orbitals are used by carbon to form covalent bonds with hydrogen?

Which of the compounds shown above is correctly identified by the name 2-methylbutane?

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

The number of different monochloro substitution products (C₅H₁₁Cl)that can form from the reaction of 2-methylbutane with Cl₂ is ________.

Organic molecules containing only carbon and hydrogen and having only single bonds are called hydrocarbons,or .

What is the hybridization of the carbon in (CH₃)₂C=CHC N indicated by the asterisk ()?

How many distinct isomers can be drawn for a molecule of C₄H₈?

How many isomers are there for C₅H₁₂?