Question 1

If you were sorting labels for a diagram about viral replication,and if you found a part of the diagram saying that "the stage of viral replication in which viral components are put together to form new viruses," you would look for a label referring to

Accepted Answer

A)  release.
B)  assembly.
C)  attachment.
D)  penetration.
E)  synthesis.F) B) and E)
G) C) and E)

Question 2

If one strand of DNA has the nitrogenous base sequence ATTCGACGCTA,then the complementary strand has the nitrogenous base sequence

Accepted Answer

A)  TAAGCTGCGAT.
B)  ATCGCAGCTTA.
C)  UAAGCUGCGAU.
D)  ATTCGACGCTA.E) All of the above
F) A) and C)

Question 3

The length of a DNA sequence is _____ than the mature mRNA transcribed from it,because

Accepted Answer

A)  shorter;it does not contain exons.
B)  equal;it was transcribed from the DNA sequence.
C)  longer;it does not contain introns.
D)  shorter;each codon of three bases encodes only one amino aciD.
E)  longer;each codon of one amino acid encodes three bases.F) A) and D)
G) A) and E)

Question 4

In DNA,T binds to G.

Accepted Answer

A) True 
 B)False

Question 5

Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years,and when a patient becomes stressed the virus is released,forming cold sores on the lips.Why would the virus form a cold sore?

Accepted Answer

A)  to spread to a new host
B)  so that it can mutate and survive antibiotic treatment
C)  to become latent in the body
D)  to avoid the immune system
E)  to warn other people that the host is infectedF) A) and B)
G) B) and C)

Question 6

In a "frameshift" mutation

Accepted Answer

A)  the codon that mutates causes no change in the amino acid specified.
B)  the codon that mutates causes a stop codon to occur instead of the placement of an amino acid.
C)  the mutation does not occur in a codon.
D)  the mutation is caused by an addition or deletion of one or more nucleotides.
E)  the mutation is not in DNA.F) A) and B)
G) A) and C) D

Question 7

In DNA molecules,

Accepted Answer

A)  cytosine pairs with guanine.
B)  thymine pairs with uracil.
C)  adenine pairs with uracil.
D)  adenine pairs with guanine.
E)  cytosine pairs with thyminE.F) All of the above
G) A) and B) A

Question 8

The amino acid that starts every protein and that is encoded by ACG is methionine.

Accepted Answer

A) True 
 B)False

Question 9

"Tomato bunchy top" is caused by a virus.

Accepted Answer

A) True 
 B)False

Question 10

Viruses

Accepted Answer

A)  consist of only a single cell.
B)  are smaller than cells.
C)  consist of multiple cells.
D)  contain a nucleus.
E)  contain ribosomes.F) D) and E)
G) B) and E)

Question 11

A tRNA molecule is "bilingual" because it binds to

Accepted Answer

A)  amino acids and DNA.
B)  DNA and mRNA codons.
C)  promoters and amino acids.
D)  codons of mRNA and amino acids.
E)  promoters and terminators.F) A) and E)
G) B) and E)

Question 12

If you were a vet examining a cat with an illness,and tests showed that a viral infection was causing the cat's cells to burst,you would say that the cat had

Accepted Answer

A)  a rare form of viral infection.
B)  a transgenic infection.
C)  a lysogenic infection.
D)  a lytic infection.
E)  a systematic infection.F) A) and C)
G) A) and D)

Question 13

In DNA,A binds to C.

Accepted Answer

A) True 
 B)False

Question 14

DNA differs from RNA because,unlike RNA,

Accepted Answer

A)  DNA contains uracil.
B)  DNA contains thymine.
C)  DNA can catalyze some chemical reactions.
D)  DNA is single-strandeD.
E)  DNA contains ribosE.F) C) and D)
G) B) and E)

Question 15

The enzyme that HIV uses to convert its RNA into DNA is

Accepted Answer

A)  reverse transcriptase.
B)  DNA polymerase.
C)  RNA polymerase.
D)  RNA integrase.
E)  translasE.F) None of the above
G) A) and C)

Question 16

The influenza virus contains an RNA genome.Why do scientists typically have to make a new vaccine for the flu every year?

Accepted Answer

A)  because our bodies develop resistance to the vaccine and it becomes less effective
B)  because the virus develops resistance to the vaccine
C)  because the virus can mutate into new strains
D)  because people change their habits each year and become susceptible to different strains of the virus
E)  because the common influenza virus can come from many species of animals including cats and dogsF) All of the above
G) A) and E) C

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

RNA differs from DNA in many ways,including

Accepted Answer

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

Question 19

RNA processing involves covalently attaching a piece of RNA to a piece of DNA.

Accepted Answer

A) True 
 B)False

Question 20

RNA processing involves splicing.

Accepted Answer

A) True 
 B)False

Exam 7: Dna Structure and Gene Function

If you were sorting labels for a diagram about viral replication,and if you found a part of the diagram saying that "the stage of viral replication in which viral components are put together to form new viruses," you would look for a label referring to

Correct AnswerverifiedShow Answer

If one strand of DNA has the nitrogenous base sequence ATTCGACGCTA,then the complementary strand has the nitrogenous base sequence

Correct AnswerverifiedShow Answer

The length of a DNA sequence is _____ than the mature mRNA transcribed from it,because

Correct AnswerverifiedShow Answer

In DNA,T binds to G.

Correct AnswerverifiedShow Answer

Oral infections with herpes simplex virus 1 can lie dormant in nerve cells for years,and when a patient becomes stressed the virus is released,forming cold sores on the lips.Why would the virus form a cold sore?

Correct AnswerverifiedShow Answer

In a "frameshift" mutation

Correct AnswerverifiedD

In DNA molecules,

Correct AnswerverifiedA

The amino acid that starts every protein and that is encoded by ACG is methionine.

Correct AnswerverifiedShow Answer

"Tomato bunchy top" is caused by a virus.

Correct AnswerverifiedShow Answer

Viruses

Correct AnswerverifiedShow Answer

A tRNA molecule is "bilingual" because it binds to

Correct AnswerverifiedShow Answer

If you were a vet examining a cat with an illness,and tests showed that a viral infection was causing the cat's cells to burst,you would say that the cat had

Correct AnswerverifiedShow Answer

In DNA,A binds to C.

Correct AnswerverifiedShow Answer

DNA differs from RNA because,unlike RNA,

Correct AnswerverifiedShow Answer

The enzyme that HIV uses to convert its RNA into DNA is

Correct AnswerverifiedShow Answer

The influenza virus contains an RNA genome.Why do scientists typically have to make a new vaccine for the flu every year?

Correct AnswerverifiedC

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

Correct AnswerverifiedShow Answer

RNA differs from DNA in many ways,including

Correct AnswerverifiedShow Answer

RNA processing involves covalently attaching a piece of RNA to a piece of DNA.

Correct AnswerverifiedShow Answer

RNA processing involves splicing.

Correct AnswerverifiedShow Answer

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D

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A

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C

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