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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
The mutation which will not affect the length of a protein is,

missense mutation
nonsense mutation
frameshift mutation
all of these

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

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

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

photosynthesis
photoreactivation
excision repair
phosphorylation

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

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

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

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

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

Excision repair
Never leads to mutation
SOS repair
Photoreactivation

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