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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?

SOS repair
Never leads to mutation
Excision repair
Photoreactivation

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

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

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DNA Sequencing, Mutation and Repair
A nonsense mutation may result into

a premature termination of the synthesis of a polypeptide
an abnormal elongation of a polypeptide
a large deletion within the reading frame of a gene
modification of mRNA

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DNA Sequencing, Mutation and Repair
Genetic variations are

not heritable
influenced by the environment
stable
temporary

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

All of these
Excision
Ligation
Incision

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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
expressed both in bacteria and mammalian cells
the natural promoter of the gene being cloned

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