Question 1

What is the purpose of the inverted repeats at the ends of DNA-based transposons?

Accepted Answer

A)  The inverted repeats are recognized by enzymes that move the elements.
B)  The inverted repeats are the sites of transfer.
C)  The inverted repeats are recognized by restriction enzymes that cut out the transposon.
D)  The inverted repeats are magnets for nucleases.E) B) and C)
F) All of the above A

Question 2

Where might mobile DNA elements be found?

Accepted Answer

A)  plasmids
B)  chromosomes
C)  viral genomes
D)  all of the aboveE) C) and D)
F) B) and C)

Question 3

Internal resolution sites of complex transposons are recognized by ـــــــــــــــــــــ.

Accepted Answer

A)  Dicer
B)  cointegrase
C)  recombinase
D)  resolvaseE) A) and C)
F) All of the above

Question 4

Defective copies of transposable elements that are found in genomes are calledـــــــــــــــــــــــ .

Accepted Answer

A)  junk DNA
B)  transposable elements
C)  retrotransposons
D)  intronsE) C) and D)
F) B) and D)

Question 5

Conservative transpositionــــــــــــــــــــــــــ .

Accepted Answer

A)  generates a copy of the transposon
B)  generates double-stranded breaks in the DNA
C)  occurs only for RNA transposons
D)  has no detrimental effects on the host genome.E) B) and D)
F) A) and D)

Question 6

Resolvase is needed forــــــــــــــــــــــ .

Accepted Answer

A)  conservative transposition
B)  replicative transposition
C)  simple transposons
D)  retrotransposonsE) A) and D)
F) A) and C) B

Question 7

All transposons have all of the following characteristics except ــــــــــــــــــــــ.

Accepted Answer

A)  the gene for transposase
B)  inverted repeats
C)  resolvase
D)  antibiotic resistance genesE) None of the above
F) C) and D)

Question 8

Reverse transcsriptase is needed forــــــــــــــــــ .

Accepted Answer

A)  the movement of retrotransposons
B)  the integration of RNA transposons
C)  the transcription of RNA transposons
D)  the excision of retrotransposonsE) None of the above
F) All of the above A

Question 9

Theـــــــــــــــــــ of Tn21 family of transposons acts as a gene acquisition and expression system and has been implicated in the spread of antibiotic resistance.

Accepted Answer

A)  IRS
B)  integron
C)  replicon
D)  inverted repeatsE) A) and C)
F) C) and D)

Question 10

Any DNA or RNA molecule that has an origin of replication is called aـــــــــــــــــــــــ .

Accepted Answer

A)  mobile element
B)  transposon
C)  replicon
D)  integronE) B) and D)
F) A) and D)

Exam 22: Mobile DNA

What is the purpose of the inverted repeats at the ends of DNA-based transposons?

Correct Answer
verified
A

Where might mobile DNA elements be found?

Correct Answer
verified

Internal resolution sites of complex transposons are recognized by ـــــــــــــــــــــ.

Correct Answer
verified

Defective copies of transposable elements that are found in genomes are calledـــــــــــــــــــــــ .

Correct Answer
verified

Conservative transpositionــــــــــــــــــــــــــ .

Correct Answer
verified

Resolvase is needed forــــــــــــــــــــــ .

Correct Answer
verified
B

All transposons have all of the following characteristics except ــــــــــــــــــــــ.

Correct Answer
verified

Reverse transcsriptase is needed forــــــــــــــــــ .

Correct Answer
verified
A

Theـــــــــــــــــــ of Tn21 family of transposons acts as a gene acquisition and expression system and has been implicated in the spread of antibiotic resistance.

Correct Answer
verified

Any DNA or RNA molecule that has an origin of replication is called aـــــــــــــــــــــــ .

Correct Answer
verified

Exam 22: Mobile DNA

What is the purpose of the inverted repeats at the ends of DNA-based transposons?

Correct AnswerverifiedA

Where might mobile DNA elements be found?

Correct AnswerverifiedShow Answer

Internal resolution sites of complex transposons are recognized by ـــــــــــــــــــــ.

Correct AnswerverifiedShow Answer

Defective copies of transposable elements that are found in genomes are calledـــــــــــــــــــــــ .

Correct AnswerverifiedShow Answer

Conservative transpositionــــــــــــــــــــــــــ .

Correct AnswerverifiedShow Answer

Resolvase is needed forــــــــــــــــــــــ .

Correct AnswerverifiedB

All transposons have all of the following characteristics except ــــــــــــــــــــــ.

Correct AnswerverifiedShow Answer

Reverse transcsriptase is needed forــــــــــــــــــ .

Correct AnswerverifiedA

Theـــــــــــــــــــ of Tn21 family of transposons acts as a gene acquisition and expression system and has been implicated in the spread of antibiotic resistance.

Correct AnswerverifiedShow Answer

Any DNA or RNA molecule that has an origin of replication is called aـــــــــــــــــــــــ .

Correct AnswerverifiedShow Answer

Correct Answer
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A

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B

Correct Answer
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A

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