Question 1

Although antibiotics do not kill viruses,they offer promise for destroying viroids and prions because of their actions on cell ribosomes and enzymes.

Accepted Answer

A) True 
 B)False

Question 2

An infectious protein is a

Accepted Answer

A)  virus.
B)  viroid.
C)  prion.
D)  virion.
E)  prophagE.

Question 3

A layer of membrane attached to a virus is called

Accepted Answer

A)  an envelope.
B)  a protein coat.
C)  a chromosome.
D)  a plasmiD.
E)  a nucleus.

Question 4

A highly wound circle of RNA without a protein coat is a

Accepted Answer

A)  virus.
B)  virion.
C)  viroid.
D)  prion.
E)  prophagE.

Question 5

The DNA sequence ATGCATGC will pair with which of the following DNA strands? 0_30_2012

Accepted Answer

A)  TACGTACG
B)  TACCTACC
C)  ATGCATGC
D)  TTGCATCC
E)  CGTACGTA

Question 6

A three-base sequence (loop) in tRNA that is complementary to a three-base sequence in mRNA is

Accepted Answer

A)  a codon.
B)  an anticodon.
C)  a promoter.
D)  a terminator.
E)  an amino acid attachment sitE.

Question 7

A group of genes,a promoter,and an operator that control transcription are called a(n)

Accepted Answer

A)  translational unit.
B)  chromosome.
C)  ribosome.
D)  envelope.
E)  operon.

Question 8

Cystic fibrosis may be caused by a protein that does not fold correctly.

Accepted Answer

A) True 
 B)False

Question 9

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

Accepted Answer

A)  12
B)  6
C)  27
D)  9
E)  3

Question 10

A DNA sequence that signals the start of a gene is

Accepted Answer

A)  a codon.
B)  an anticodon.
C)  a terminator.
D)  a promoter.
E)  an amino acid attachment sitE.

Question 11

Mutations can be caused by errors in copying DNA.

Accepted Answer

A) True 
 B)False

Question 12

What are proteins that initiate transcription in eukaryotes by recognizing sequences within the promoter region of a gene and attracting RNA polymerase?

Accepted Answer

A)  repressors
B)  inducers
C)  transcription factors
D)  TATA boxes
E)  poly A tails

Question 13

Amanatin is a toxin found in the death cap mushroom,Amanita phalloides.It inhibits RNA polymerase,thus blocking

Accepted Answer

A)  transcription.
B)  translation.
C)  replication.
D)  cell division.
E)  RNA splicing.

Question 14

If genetic tests showed that a tomato plant had viral DNA integrated into its chromosomes without outward symptoms caused bthe virus,you could say that the tomato plant had

Accepted Answer

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

Question 15

A drug that inhibited reverse transcriptase could be used to fight some viruses.

Accepted Answer

A) True 
 B)False

Question 16

The step of translation in which amino acids are added to the growing polypeptide is

Accepted Answer

A)  mitosis.
B)  initiation.
C)  elongation.
D)  termination.
E)  transcription.

Question 17

Mutations can be caused by environmental chemicals.

Accepted Answer

A) True 
 B)False

Question 18

If you found a living Neadertal,genetic analysis of FOXP2 would show maximal similarity to the homologous gene in mice.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following diseases is caused by something other than viruses?

Accepted Answer

A)  the common cold and influenza
B)  smallpox and mononucleosis
C)  polio and rabies
D)  AIDS and warts
E)  diabetes

Question 20

The step of translation in which an mRNA,a small ribosomal subunit,and the initiator tRNA are aligned together is

Accepted Answer

A)  initiation.
B)  mitosis.
C)  elongation.
D)  termination.
E)  transcription.

Exam 7: Dna Structure and Gene Function

If you found a living Neadertal,genetic analysis of FOXP2 would show maximal similarity to the homologous gene in mice.

Correct AnswerverifiedShow Answer

The DNA sequence ATGCATGC will pair with which of the following DNA strands? 0_30_2012

Correct AnswerverifiedShow Answer

Mutations can be caused by errors in copying DNA.

Correct AnswerverifiedShow Answer

Mutations can be caused by environmental chemicals.

Correct AnswerverifiedShow Answer

A DNA sequence that signals the start of a gene is

Correct AnswerverifiedShow Answer

A layer of membrane attached to a virus is called

Correct AnswerverifiedShow Answer

A drug that inhibited reverse transcriptase could be used to fight some viruses.

Correct AnswerverifiedShow Answer

A highly wound circle of RNA without a protein coat is a

Correct AnswerverifiedShow Answer

Amanatin is a toxin found in the death cap mushroom,Amanita phalloides.It inhibits RNA polymerase,thus blocking

Correct AnswerverifiedShow Answer

A group of genes,a promoter,and an operator that control transcription are called a(n)

Correct AnswerverifiedShow Answer

A three-base sequence (loop) in tRNA that is complementary to a three-base sequence in mRNA is

Correct AnswerverifiedShow Answer

The step of translation in which an mRNA,a small ribosomal subunit,and the initiator tRNA are aligned together is

Correct AnswerverifiedShow Answer

If genetic tests showed that a tomato plant had viral DNA integrated into its chromosomes without outward symptoms caused bthe virus,you could say that the tomato plant had

Correct AnswerverifiedShow Answer

An infectious protein is a

Correct AnswerverifiedShow Answer

The step of translation in which amino acids are added to the growing polypeptide is

Correct AnswerverifiedShow Answer

What are proteins that initiate transcription in eukaryotes by recognizing sequences within the promoter region of a gene and attracting RNA polymerase?

Correct AnswerverifiedShow Answer

Cystic fibrosis may be caused by a protein that does not fold correctly.

Correct AnswerverifiedShow Answer

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

Correct AnswerverifiedShow Answer

Which of the following diseases is caused by something other than viruses?

Correct AnswerverifiedShow Answer

Although antibiotics do not kill viruses,they offer promise for destroying viroids and prions because of their actions on cell ribosomes and enzymes.

Correct AnswerverifiedShow Answer

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