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DNA Sequencing, Mutation and Repair

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

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

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

Never leads to mutation
SOS repair
Photoreactivation
Excision repair

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

excision repair
phosphorylation
photosynthesis
photoreactivation

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

Ligation
Excision
All of these
Incision

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

nonsense mutation
transversion
lethal mutation
none of these

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DNA Sequencing, Mutation and Repair
Genetic variations are

stable
temporary
influenced by the environment
not heritable

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