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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?

Never leads to mutation
Photoreactivation
Excision repair
SOS repair

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DNA Sequencing, Mutation and Repair
Genetic variations are

temporary
not heritable
stable
influenced by the environment

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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
transversion
nonsense mutation

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DNA Sequencing, Mutation and Repair
A nonsense mutation introduced into the DNA sequence of a gene may

have no effect on the transcript or protein made
shorten the length of the protein encoded by the gene
cause premature termination of the mRNA
cause a shift in reading frame

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

Site mutation
Aerial mutation
Point mutation
Regional mutation

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DNA Sequencing, Mutation and Repair
Which of the following(s) is/are steps in excision repair mechanisms?

Excision
All of these
Ligation
Incision

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