Question 1

In a "nonsense" mutation:

Accepted Answer

A)  The codon that mutates does not cause a change in the amino acid specified
B)  The codon that mutates causes a change in the amino acid specified
C)  The codon that mutates causes a stop codon to occur instead of the placement of an amino acid
D)  The mutation does not occur in a codon
E)  The mutation is not in DNAF) A) and B)
G) B) and E)

Question 2

In eukaryotic cells sequences of mRNA that are removed from an mRNA molecule before being translated are:

Accepted Answer

A)  Introns
B)  Anticodons
C)  Exons
D)  Proteomes
E)  TerminatorsF) C) and E)
G) B) and E)

Question 3

A gene is any DNA sequence that is transcribed to any type of RNA.

Accepted Answer

A) True 
 B)False

Question 4

The process used by cells to convert the mRNA "message" into a sequence of amino acids is:

Accepted Answer

A)  Transcription
B)  Replication
C)  Mitosis
D)  Amino acid synthesis
E)  TranslationF) A) and E)
G) B) and D)

Question 5

Because cells are very efficient in the processes that they carry out,very little energy is needed for the cell to make proteins.

Accepted Answer

A) True 
 B)False

Question 6

The type of RNA that carries the information that specifies a protein is:

Accepted Answer

A)  Transfer RNA
B)  Ribosomal RNA
C)  Messenger RNA
D)  Double-stranded RNA
E)  Complementary RNAF) All of the above
G) A) and E)

Question 7

DNA differs from RNA in that:

Accepted Answer

A)  DNA contains uracil
B)  DNA contains thymine
C)  DNA can catalyze chemical reactions
D)  DNA is usually single stranded
E)  DNA contains riboseF) A) and B)
G) A) and C)

Question 8

In the Lac operon,the attachment site for RNA polymerase is:

Accepted Answer

A)  The operator
B)  The promoter
C)  The repressor
D)  The first lactose degrading gene of the operon
E)  The last lactose degrading gene of the operonF) B) and E)
G) All of the above

Question 9

-Using the genetic code shown here,predict what type of mutation has occurred in the hemoglobin sickle cell anemia allele. Normal allele 5' - GGAAUGAAACAGGAACCC - 3'
Mutant allele 5' - GGAAUGAAACAGGUACCC - 3'

Accepted Answer

A)  A point mutation, Val to Glu
B)  A frame shift
C)  Addition of a new stop codon
D)  A point mutation, Glu to ValE) C) and D)
F) All of the above

Question 10

A germline mutation occurs in cells that give rise to:

Accepted Answer

A)  Gametes
B)  Diploid cells
C)  Skin cells
D)  Nonsex cells
E)  Liver cellsF) A) and C)
G) A) and E)

Question 11

The observation that all races of humans have the same FOXP2 allele is evidence that ____ favored this allele.

Accepted Answer

A)  Recombination
B)  Artificial selection
C)  Random chance
D)  Independent assortment
E)  Natural selectionF) D) and E)
G) All of the above

Question 12

The type of RNA that helps align the ribosome and mRNA is:

Accepted Answer

A)  Messenger RNA
B)  Ribosomal RNA
C)  Transfer RNA
D)  Double-stranded RNA
E)  Complementary RNAF) C) and D)
G) A) and B)

Question 13

Transcription and replication occur during ____________________ of the cell cycle.

Accepted Answer

A)  Interphase
B)  Prophase
C)  Metaphase
D)  Anaphase
E)  TelophaseF) A) and B)
G) A) and C)

Question 14

In the Lac operon,the protein that binds to the operator to prevent transcription is:

Accepted Answer

A)  The repressor
B)  RNA polymerase
C)  DNA polymerase
D)  The promoter
E)  LactoseF) C) and D)
G) All of the above

Question 15

A diploid cell only has two copies of most genes,but can make hundreds of copies of a protein from those genes per second because during translation:

Accepted Answer

A)  Multiple codons can encode for the same amino acid
B)  Multiple copies of the same mRNA can be produced from one gene
C)  The DNA can replicate making more copies of the gene
D)  Once formed, proteins can feed back and help make more proteins
E)  Multiple ribosomes can bind to the same mRNA simultaneouslyF) None of the above
G) B) and D)

Question 16

A transgenic organism is an organism that receives all of its genes from only a single parent.

Accepted Answer

A) True 
 B)False

Question 17

In a "missense" mutation:

Accepted Answer

A)  The codon that mutates does not cause a change in the amino acid specified
B)  The codon that mutates causes a change in the amino acid specified
C)  The codon that mutates causes a stop codon to occur instead of the placement of an amino acid
D)  The mutation does not occur in a codon
E)  The mutation is not in DNAF) B) and E)
G) B) and C)

Question 18

A region of a chromosome contains two strands of DNA,yet only one is used to transcribe a gene because:

Accepted Answer

A)  RNA polymerase binds to the promoter, initiating transcription on one strand of DNA
B)  The start of transcription is random along the chromosome and doesn't always occur on a gene
C)  RNA polymerase binds to the terminator, stopping transcription on one strand of DNA
D)  Both strands are transcribed, but only one strand of DNA contains a reading frame
E)  All genes are found on the same strand of DNA in a chromosomeF) A) and B)
G) A) and E)

Question 19

What type of mutation has occurred in the following? Normal allele 5' - GGAAUGAAACAGGAACCC - 3'
Mutant allele 5' - GGAAUGAAACAGGUACCC - 3'

Accepted Answer

A)  Substitution
B)  Insertion of one base
C)  Deletion of one base
D)  Insertion of two bases
E)  Deletion of two basesF) A) and B)
G) C) and D)

Question 20

How can a single gene encode for more than one protein?

Accepted Answer

A)  By mutating their genes
B)  By removing some exons during splicing of mRNA
C)  By transcribing multiple copies of mRNA
D)  By using different codons
E)  By using transgenesF) A) and B)
G) B) and E)

Exam 7: Dna Structure and Gene Function

The type of RNA that carries the information that specifies a protein is:

Correct AnswerverifiedShow Answer

What type of mutation has occurred in the following? Normal allele 5' - GGAAUGAAACAGGAACCC - 3' Mutant allele 5' - GGAAUGAAACAGGUACCC - 3'

Correct AnswerverifiedShow Answer

DNA differs from RNA in that:

Correct AnswerverifiedShow Answer

In the Lac operon,the protein that binds to the operator to prevent transcription is:

Correct AnswerverifiedShow Answer

In the Lac operon,the attachment site for RNA polymerase is:

Correct AnswerverifiedShow Answer

A diploid cell only has two copies of most genes,but can make hundreds of copies of a protein from those genes per second because during translation:

Correct AnswerverifiedShow Answer

A region of a chromosome contains two strands of DNA,yet only one is used to transcribe a gene because:

Correct AnswerverifiedShow Answer

-Using the genetic code shown here,predict what type of mutation has occurred in the hemoglobin sickle cell anemia allele. Normal allele 5' - GGAAUGAAACAGGAACCC - 3' Mutant allele 5' - GGAAUGAAACAGGUACCC - 3'

Correct AnswerverifiedShow Answer

A germline mutation occurs in cells that give rise to:

Correct AnswerverifiedShow Answer

Because cells are very efficient in the processes that they carry out,very little energy is needed for the cell to make proteins.

Correct AnswerverifiedShow Answer

In a "missense" mutation:

Correct AnswerverifiedShow Answer

A gene is any DNA sequence that is transcribed to any type of RNA.

Correct AnswerverifiedShow Answer

In a "nonsense" mutation:

Correct AnswerverifiedShow Answer

The process used by cells to convert the mRNA "message" into a sequence of amino acids is:

Correct AnswerverifiedShow Answer

The observation that all races of humans have the same FOXP2 allele is evidence that ____ favored this allele.

Correct AnswerverifiedShow Answer

Transcription and replication occur during ____________________ of the cell cycle.

Correct AnswerverifiedShow Answer

A transgenic organism is an organism that receives all of its genes from only a single parent.

Correct AnswerverifiedShow Answer

How can a single gene encode for more than one protein?

Correct AnswerverifiedShow Answer

In eukaryotic cells sequences of mRNA that are removed from an mRNA molecule before being translated are:

Correct AnswerverifiedShow Answer

The type of RNA that helps align the ribosome and mRNA is:

Correct AnswerverifiedShow Answer

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