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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?

Excision repair
Photoreactivation
Never leads to mutation
SOS repair

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

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

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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

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

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

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

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