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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Which of these mechanisms for thymine dimers repair lead to mutations?

Photoreactivation
Never leads to mutation
Excision repair
SOS repair

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

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

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

Regional mutation
Point mutation
Aerial mutation
Site mutation

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

transversion
nonsense mutation
none of these
lethal mutation

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

Spontaneous mutations
Analogous mutations
None of these
Induced mutations

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DNA Sequencing, Mutation and Repair
Thymine dimers are directly repaired with the help of visible light by process known as

photoreactivation
phosphorylation
photosynthesis
excision repair

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