Question 1

Which two amino acids form the dipeptide below?

Accepted Answer

A)  asparagine and proline
B)  glycine and cysteine
C)  serine and alanine
D)  threonine and valineE) A) and B)
F) B) and C)

Question 2

An alkyl group is named for the part of the alkane group that remains after a ________ is removed.

Accepted Answer

A)  C atom
B)  CH3 group
C)  CH2 group
D)  H atomE) A) and C)
F) B) and C)

Question 3

Cytosine is a base that occurs in ________ (DNA,RNA,DNA and RNA).

Accepted Answer

The answer of Cytosine is a base that occurs in...

Question 4

Which of the following bases pairs with adenine in DNA?

Accepted Answer

A)  cytosine
B)  guanine
C)  thymine
D)  uracilE) B) and C)
F) A) and B)

Question 5

None of the listed compounds contains a ring.Which could have one carbon-carbon triple bond?

Accepted Answer

A)  C3H8
B)  C2H2
C)  C10H20
D)  All of theseE) B) and C)
F) A) and D)

Question 6

What class of hydrocarbons has the general formula CnH2n?

Accepted Answer

A)  alkanes
B)  alkenes and cycloalkanes
C)  alkynes
D)  aromaticsE) All of the above
F) B) and D)

Question 7

A partial hydrolysis of a protein yielded the following fragments: Ser-Gly,Gly-Ala,Gly-Ala-Val,Val-Leu,Ala-Val.What is the sequence of amino acids in the polypeptide?

Accepted Answer

A)  Gly-Leu-Ser-Ala-Val
B)  Leu-Ala-Gly-Val-Ser
C)  Ser-Gly-Ala-Val-Leu
D)  Val-Ala-Gly-Ser-LeuE) A) and D)
F) B) and D)

Question 8

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.E) B) and C)
F) A) and B)

Question 9

Which is an amino acid polar neutral side chain?

Accepted Answer

A)  -CH3
B)  -CH2OH
C)  -CH2CO2H
D)  -CH2CH2CH2CH2NH2E) C) and D)
F) A) and B)

Question 10

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.E) All of the above
F) A) and B)

Question 11

To which family does this organic compound belong?

Accepted Answer

A)  alkane
B)  alkene
C)  alkyne
D)  areneE) A) and C)
F) A) and B)

Question 12

Identify the following amine base found in nucleic acids.

Accepted Answer

A)  Adenine (
A)  
B)  Cytosine (
C)  
C)  Thymine (T) 
D)  Uracil (U) E) A) and D)
F) None of the above

Question 13

Benzene has a formula of

Accepted Answer

A)  C3H8.
B)  C6H10.
C)  C6H6.
D)  C8H16.E) A) and B)
F) A) and C)

Question 14

What is the backbone of the nucleic acid constructed of?

Accepted Answer

A)  alternating sugar phosphate groups
B)  amine bases
C)  glucose polymers
D)  polyamidesE) B) and D)
F) B) and C)

Question 15

To which family does this organic compound belong?

Accepted Answer

A)  amide
B)  amine
C)  carboxylic acid
D)  esterE) None of the above
F) A) and D)

Question 16

What is the name of the following structure?

Accepted Answer

A)  cis-1-ethyl-2-chloroethane
B)  cis-1-chloro-1-butene
C)  trans-1-chloro-1-butene
D)  trans-1-chloro-2-ethylethaneE) A) and D)
F) C) and D)

Question 17

Which structure is 1,4-dibromobenzene?

Accepted Answer

A)  structure I
B)  structure II
C)  structure III
D)  structure IVE) B) and C)
F) A) and D)

Question 18

Is the following model of glucose in the α form or the β form?

Accepted Answer

A)  α form
B)  β formC) A) and B)
D) undefined

Question 19

Peptide bonds that link amino acids together in proteins contain the ________ functional group.

Accepted Answer

A)  amine
B)  amide
C)  ester
D)  ketoneE) A) and B)
F) None of the above

Question 20

Identify the functional group:

Accepted Answer

A)  alcohol
B)  amine
C)  amide
D)  esterE) None of the above
F) A) and C)

Exam 23: Connections to Organic and Biological Chemistry

Cytosine is a base that occurs in ________ (DNA,RNA,DNA and RNA).

Correct AnswerverifiedShow Answer

A partial hydrolysis of a protein yielded the following fragments: Ser-Gly,Gly-Ala,Gly-Ala-Val,Val-Leu,Ala-Val.What is the sequence of amino acids in the polypeptide?

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What is the backbone of the nucleic acid constructed of?

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Which structure is 1,4-dibromobenzene?

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Identify the functional group:

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Which is an amino acid polar neutral side chain?

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Identify the following amine base found in nucleic acids.

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What class of hydrocarbons has the general formula CnH2n?

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Is the following model of glucose in the α form or the β form?

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Which two amino acids form the dipeptide below?

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Which of the following bases pairs with adenine in DNA?

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What is the name of the following structure?

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Benzene has a formula of

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To which family does this organic compound belong?

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To which family does this organic compound belong?

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

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

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An alkyl group is named for the part of the alkane group that remains after a ________ is removed.

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None of the listed compounds contains a ring.Which could have one carbon-carbon triple bond?

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Peptide bonds that link amino acids together in proteins contain the ________ functional group.

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What class of hydrocarbons has the general formula C_nH_2n?

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