Question 1

The purine bases are

Accepted Answer

A)  fused 5 and 6 membered ring systems containing 4 ring nitrogens.
B)  6 membered ring systems containing 2 ring nitrogens.
C)  6 membered ring systems containing 4 ring nitrogens.
D)  fused 5 and 6 membered ring systems containing 2 nitrogens.
E)  none of the aboveF) All of the above
G) A) and B)

Question 2

The process of manufacturing an identical copy of a DNA molecule is called

Accepted Answer

A)  mutation.
B)  replication.
C)  transcription.
D)  translation.
E)  translocation.F) All of the above
G) A) and B)

Question 3

Codons provide the information needed to synthesize

Accepted Answer

A)  nucleic acids.
B)  carbohydrates.
C)  lipids.
D)  proteins.E) None of the above
F) B) and C)

Question 4

What is the complementary strand for a single DNA strand with the sequence TCGA?

Accepted Answer

A)  TGCA
B)  AGCT
C)  CTAC
D)  GATC
E)  TCGAF) A) and B)
G) A) and E)

Question 5

All of the following are components of nucleotides except

Accepted Answer

A)  aldopentoses in the form of five-membered rings.
B)  heterocyclic nitrogen bases consisting of six-membered rings.
C)  heterocyclic nitrogen bases consisting of two fused rings.
D)  phosphate groups.
E)  metal ions.F) None of the above
G) C) and D) E

Question 6

When a new strand of RNA is transcribed from the DNA strand shown,its base sequence will be
Informational strand of DNA: TTACGGAT
Template strand of DNA: AATGCCTA

Accepted Answer

A)  TTACGGAT.
B)  AATGCCTA.
C)  UUACGGAU.
D)  AAUGCCUA.
E)  UUTGCCTU.F) B) and D)
G) A) and B)

Question 7

The central belief of molecular genetics states that

Accepted Answer

A)  every copy of DNA is an exact replica of the parent molecule.
B)  DNA stores genetic information and RNA reads,decodes,and uses that information.
C)  in DNA and RNA adenine always pairs with thymine and cytosine always pairs with guanine.
D)  each amino acid is coded by a unique set of three base pairs.
E)  replication of DNA is a semiconservative process.F) A) and B)
G) None of the above

Question 8

Match the following.
-genetic code

Accepted Answer

A)  the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis
B)  a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
C)  the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins
D)  a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
E)  the sequence of nucleotides that specifies sequences of amino acids in protein synthesisF) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groupsG) the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesisH) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chainI) one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNAJ) a category of base found in nucleic acids consisting of a 6-membered heterocyclic moleculeK) one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNAL) C) and K)
M) C) and J)

Question 9

Match the following.
-purine bases

Accepted Answer

A)  the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis
B)  a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
C)  the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins
D)  a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
E)  the sequence of nucleotides that specifies sequences of amino acids in protein synthesisF) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groupsG) the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesisH) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chainI) one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNAJ) a category of base found in nucleic acids consisting of a 6-membered heterocyclic moleculeK) one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNAL) D) and G)
M) C) and E) I

Question 10

Which of the following is a major function of nucleic acids?

Accepted Answer

A)  storage and transfer of genetic information
B)  storage and intracellular transfer of energy
C)  catalysis of virtually all biochemical reactions
D)  structural support in both plants and animals
E)  long-term storage of energyF) B) and D)
G) B) and C)

Question 11

During the process of transcription,the base adenine in DNA pairs with the base ________ in the new mRNA.

Accepted Answer

A)  guanine
B)  thymine
C)  cytosine
D)  uracil
E)  adenineF) B) and D)
G) B) and C)

Question 12

Match the following.
-pyrimidine bases

Accepted Answer

A)  the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis
B)  a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
C)  the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins
D)  a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
E)  the sequence of nucleotides that specifies sequences of amino acids in protein synthesisF) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groupsG) the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesisH) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chainI) one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNAJ) a category of base found in nucleic acids consisting of a 6-membered heterocyclic moleculeK) one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNAL) B) and D)
M) B) and K)

Question 13

Match the following.
-codon

Accepted Answer

A)  the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis
B)  a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
C)  the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins
D)  a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
E)  the sequence of nucleotides that specifies sequences of amino acids in protein synthesisF) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groupsG) the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesisH) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chainI) one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNAJ) a category of base found in nucleic acids consisting of a 6-membered heterocyclic moleculeK) one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNAL) E) and F)
M) D) and K)

Question 14

A nucleotide is a(an)

Accepted Answer

A)  amide of a nitrogen base and a fatty acid.
B)  amide of a nucleoside and a fatty acid.
C)  ester of a nucleoside and a fatty acid.
D)  5'-monophosphate ester of a nucleoside.
E)  polymer of alternating ribose and purine or pyrimidine units.F) B) and E)
G) A) and B)

Question 15

Chromatin is

Accepted Answer

A)  nuclear material composed of DNA and histones.
B)  the portion of a chromosome that codes for a specific trait.
C)  a protein found on the surface of a cell.
D)  the fluid part of a cell that surrounds the organelles.
E)  a component of cell membranes.F) A) and B)
G) A) and C)

Question 16

When a β-N-glycosidic bond forms between guanine and deoxyribose,the resulting molecule is called

Accepted Answer

A)  riboguanine.
B)  deoxyriboguanine.
C)  deoxyriboguanosine.
D)  guanosine.
E)  deoxyguanidine.F) B) and E)
G) C) and E)

Question 17

What are the repeating units in nucleic acids?

Accepted Answer

A)  monosaccharides
B)  amino acids
C)  nucleotides
D)  nucleosides
E)  nitrogen basesF) B) and E)
G) All of the above

Question 18

The sugar found in an RNA nucleotide is ________.

Accepted Answer

A)  D-ribose
B)  2-deoxy-D-ribose
C)  D-rhamnose
D)  D-raffinose
E)  all of the aboveF) A) and B)
G) A) and C)

Question 19

The number of hydrogen bonds between cytosine and thymine in DNA is ________.

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) C) and E)
G) D) and E) A

Question 20

Match the following.
-nucleotide

Accepted Answer

A)  the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis
B)  a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
C)  the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins
D)  a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
E)  the sequence of nucleotides that specifies sequences of amino acids in protein synthesisF) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groupsG) the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesisH) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chainI) one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNAJ) a category of base found in nucleic acids consisting of a 6-membered heterocyclic moleculeK) one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNAL) F) and H)
M) D) and J)

Exam 25: Nucleic Acids and Protein Synthesis

The purine bases are

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The process of manufacturing an identical copy of a DNA molecule is called

Correct AnswerverifiedShow Answer

Codons provide the information needed to synthesize

Correct AnswerverifiedShow Answer

What is the complementary strand for a single DNA strand with the sequence TCGA?

Correct AnswerverifiedShow Answer

All of the following are components of nucleotides except

Correct AnswerverifiedE

When a new strand of RNA is transcribed from the DNA strand shown,its base sequence will be Informational strand of DNA: TTACGGAT Template strand of DNA: AATGCCTA

Correct AnswerverifiedShow Answer

The central belief of molecular genetics states that

Correct AnswerverifiedShow Answer

Match the following. -genetic code

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Match the following. -purine bases

Correct AnswerverifiedI

Which of the following is a major function of nucleic acids?

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During the process of transcription,the base adenine in DNA pairs with the base ________ in the new mRNA.

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Match the following. -pyrimidine bases

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Match the following. -codon

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A nucleotide is a(an)

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Chromatin is

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When a β-N-glycosidic bond forms between guanine and deoxyribose,the resulting molecule is called

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What are the repeating units in nucleic acids?

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The sugar found in an RNA nucleotide is ________.

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The number of hydrogen bonds between cytosine and thymine in DNA is ________.

Correct AnswerverifiedA

Match the following. -nucleotide

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