超星 - Quiz of lecture 7

单选题

Which type of mutation in the genes would only change a codon for one amino acid into a codon for a different amino acid?

A. silent mutations,
B. insertion mutation.
C. Missense mutation,
D. nonsense mutation

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单选题

Which type of mutation in the genes would changes an amino acid codon into a stop codon?

A. silent mutations,
B. insertion mutation.
C. Missense mutation,
D. nonsense mutation

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单选题

Which type of mutation does not change the integrity of peptide sequence?

A. silent mutation,
B. insertion mutation.
C. Deletion mutation,
D. nonsense mutation

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单选题

Which gene transfer is associated with transformation?

A. Bacteriophage infection,
B. uptake of free DNA fragment.
Connection via sex pilli,
D. formation of prophage

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单选题

Which type of gene transfer is associated with conjugation?

A. Bacteriophage infection,
B. uptake of free DNA fagment.
Connection via sex pilli,
D. formation of prophage

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单选题

Which gene transfer is associated with specialized transduction?

A. Lytic bacteriophage infection,
B. uptake of free DNA fagment.
Connection via sex pili,
D. prophage excision.

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单选题

Which gene transfer is associated with generalized transduction?

A. Lytic bacteriophage infection,
B. uptake of free DNA fagment.
Connection via sex pili,
D. prophage excision.

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单选题

Although two cells are totally unrelated, one cell receives DNA from the other cell and incorporates this new DNA into its chromosome. This process is _____.

A. crossing over of DNA from the two cells
B. vertical gene transfer
C. horizontal gene transfer
D. transposition

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单选题

Which of the following statements about CONJUGATION is true?

A. Conjugation requires a sex pilus.
B. Conjugation involves a flagellum.
Conjugation is an artificial genetic engineering technique.
D. Conjugation involves DNA that has been released into the environment.

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单选题

Which of the following is not a mechanism of natural genetic transfer and recombination?

A. transduction,
B. transformation,
C. transcription,
D. conjugation

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