Question 1

The DNA sequence ATGCATGC will pair with which of the following DNA strands?

Accepted Answer

A)   TACGTACG
B)   TACCTACC
C)   ATGCATGC
D)   TTGCATCC
E)   CGTACGTAF) C) and E)
G) D) and E)

Question 2

The length of a DNA sequence is ________ the mature mRNA transcribed from it because ________.

Accepted Answer

A)   shorter than; the mature mRNA does not contain exons
B)   equal to; the mature mRNA was transcribed from the DNA sequence
C)   longer than; the mature mRNA does not contain introns
D)   shorter than; each codon of three bases encodes only one amino acid
E)   longer than; each codon of one amino acid encodes three basesF) A) and C)
G) D) and E)

Question 3

In a "silent" mutation,the

Accepted Answer

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

Question 4

"Mad cow disease" is caused by a viroid.

Accepted Answer

A) True 
 B)False

Question 5

In DNA,T binds to G.

Accepted Answer

A) True 
 B)False

Question 6

RNA differs from DNA in many ways,including

Accepted Answer

A)   DNA contains deoxyribose while RNA contains ribose.
B)   DNA contains thymine while RNA contains uracil.
C)   DNA is double stranded while RNA is single stranded.
D)   RNA can catalyze some chemical reactions and DNA cannot.
E)   All answers are correct.F) B) and C)
G) C) and D)

Question 7

In a DNA molecule,hydrogen bonds link the

Accepted Answer

A)   complementary nitrogenous bases, thus keeping the two strands of DNA parallel to each other.
B)   two strands of DNA end to end during transcription and translation.
C)   two strands of DNA end to end during transcription only.
D)   complementary deoxyribose sugars, thus maintaining a separation between the two DNA strands.E) A) and B)
F) A) and C) A

Question 8

How does the spread of viruses differ between plants and animals?

Accepted Answer

A)   Viruses must penetrate through cell walls of plant cells and not animal cells.
B)   Viruses spread faster in plants than animals because of photosynthesis.
C)   Viruses do not spread to plants, only animals.
D)   Viruses spread more slowly in plants than animals because of photosynthesis.
E)   Viruses that affect plants are all DNA viruses.F) A) and D)
G) C) and E)

Question 9

The double helix of DNA is composed of building blocks called

Accepted Answer

A)   amino acids.
B)   monosaccharides.
C)   phospholipids.
D)   disaccharides.
E)   nucleotides.F) C) and D)
G) A) and C)

Question 10

What type of mutation occurred in the following? Normal allele GGAAUGAAACAGGAACCC
Mutant allele GGAAUGAAACAGGUACCC

Accepted Answer

A)   substitution
B)   insertion
C)   deletion
D)   frameshift
E)   No answer is correct.F) C) and D)
G) A) and C)

Question 11

Only one of the two strands of DNA is transcribed because

Accepted Answer

A)   RNA polymerase binds to the promoter, initiating transcription on only one strand of DNA.
B)   the start of transcription is random along the chromosome and does not 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)   DNA consists of only one strand in the nucleus of the cell.F) B) and E)
G) A) and E)

Question 12

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

Accepted Answer

A)   a substitution mutation, Val to Glu
B)   a frame shift mutation, Val to Glu
C)   addition of a new stop codon
D)   a substitution mutation, Glu to Val
E)   a frame shift mutation, Glu to ValF) A) and B)
G) C) and E)

Question 13

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)   lactose.F) A) and D)
G) All of the above

Question 14

A gene is an RNA sequence that is transcribed to mRNA only.

Accepted Answer

A) True 
 B)False

Question 15

The correct sequence of stages of viral replication is

Accepted Answer

A)   attachment-synthesis-penetration-assembly-release
B)   penetration-attachment-assembly-synthesis-release
C)   penetration-attachment-synthesis-release-assembly
D)   attachment-penetration-assembly-synthesis-release
E)   attachment-penetration-synthesis-assembly-releaseF) D) and E)
G) None of the above

Question 16

HIV

Accepted Answer

A)   is a retrovirus.
B)   infects most mammals.
C)   can be killed with antibiotics.
D)   causes liver cancer.
E)   can be transmitted through the skin.F) B) and C)
G) D) and E) A

Question 17

Viruses often spread from plant to plant by plant eating insects who physically injure the plant while eating the plant. What probably prevents viruses from easily entering plant cells?

Accepted Answer

A)   the virus' cell walls
B)   the plant's plasma membrane
C)   the plant's cell wall
D)   the virus' plasma membrane
E)   the virus' protein coatF) B) and C)
G) B) and D)

Question 18

If the DNA in a cell consists of 20% adenine,then it will also contain ________ guanine.

Accepted Answer

A)   20%
B)   80%
C)   30%
D)   40%
E)   10%F) A) and E)
G) B) and E) C

Question 19

What type of RNA carries the information that specifies a protein?

Accepted Answer

A)   transfer RNA
B)   ribosomal RNA
C)   messenger RNA
D)   double-stranded RNA
E)   complementary RNAF) A) and B)
G) A) and E)

Question 20

The DNA sequence ATGCATGC will pair with which of the following RNA strands?

Accepted Answer

A)   UACGUACG
B)   CGAUCGAU
C)   AUGCAUGC
D)   TAGCTAGC
E)   UAGCTAGCF) C) and D)
G) A) and B)

Exam 7: DNA Structure and Gene Function

The DNA sequence ATGCATGC will pair with which of the following DNA strands?

Correct AnswerverifiedShow Answer

The length of a DNA sequence is ________ the mature mRNA transcribed from it because ________.

Correct AnswerverifiedShow Answer

In a "silent" mutation,the

Correct AnswerverifiedShow Answer

"Mad cow disease" is caused by a viroid.

Correct AnswerverifiedShow Answer

In DNA,T binds to G.

Correct AnswerverifiedShow Answer

RNA differs from DNA in many ways,including

Correct AnswerverifiedShow Answer

In a DNA molecule,hydrogen bonds link the

Correct AnswerverifiedA

How does the spread of viruses differ between plants and animals?

Correct AnswerverifiedShow Answer

The double helix of DNA is composed of building blocks called

Correct AnswerverifiedShow Answer

What type of mutation occurred in the following? Normal allele GGAAUGAAACAGGAACCC Mutant allele GGAAUGAAACAGGUACCC

Correct AnswerverifiedShow Answer

Only one of the two strands of DNA is transcribed because

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A gene is an RNA sequence that is transcribed to mRNA only.

Correct AnswerverifiedShow Answer

The correct sequence of stages of viral replication is

Correct AnswerverifiedShow Answer

HIV

Correct AnswerverifiedA

Viruses often spread from plant to plant by plant eating insects who physically injure the plant while eating the plant. What probably prevents viruses from easily entering plant cells?

Correct AnswerverifiedShow Answer

If the DNA in a cell consists of 20% adenine,then it will also contain ________ guanine.

Correct AnswerverifiedC

What type of RNA carries the information that specifies a protein?

Correct AnswerverifiedShow Answer

The DNA sequence ATGCATGC will pair with which of the following RNA strands?

Correct AnswerverifiedShow Answer

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The length of a DNA sequence is the mature mRNA transcribed from it because .

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A

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A

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C

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