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DNA Sequencing, Mutation and Repair

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

nonsense mutation
lethal mutation
none of these
transversion

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DNA Sequencing, Mutation and Repair
Which of the following bacterial genome was sequenced first?

E. coli
H. influenzae
S. thermophilus
S. pneumoniae

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

an abnormal elongation of a polypeptide
a premature termination of the synthesis 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
Frame shift mutation may occur as a result of

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

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

Excision
Incision
Ligation
All of these

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