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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
SOS repair
Excision repair

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

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

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

phosphorylation
photosynthesis
excision repair
photoreactivation

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DNA Sequencing, Mutation and Repair
The promoter on an expression vector used to overproduce proteins in bacteria is

expressed both in bacteria and mammalian cells
not a regulated promoter
a bacterial promoter
the natural promoter of the gene being cloned

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DNA Sequencing, Mutation and Repair
Differentiation of four different bases in automated sequencing systems is that each base has

unique antibody bound to it
cytosine at start
distinctive fluorescent tag
different radioactive tag

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