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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Which of the following mutation affects only a single nucleotide?

Point mutation
Site mutation
Aerial mutation
Regional mutation

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DNA Sequencing, Mutation and Repair
Which of the following mutations arise without exposure to external agents?

Induced mutations
Analogous mutations
Spontaneous mutations
None of these

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DNA Sequencing, Mutation and Repair
Frame shift mutation may occur as a result of

formation of a thymine-dimer
conversion of guanine to xanthine
None of these
deamination of cytosine to uracil

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DNA Sequencing, Mutation and Repair
When mutations involve vital functions so that the mutants are nonviable, it is a

lethal mutation
none of these
nonsense mutation
transversion

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DNA Sequencing, Mutation and Repair
Changes in which of the following characterizes mutations?

Genotype
Phenotype
Both (a) and (b)
None of these

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DNA Sequencing, Mutation and Repair
A nonsense mutation may result into

modification of mRNA
an abnormal elongation of a polypeptide
a premature termination of the synthesis of a polypeptide
a large deletion within the reading frame of a gene

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