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DNA Sequencing, Mutation and Repair

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

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

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DNA Sequencing, Mutation and Repair
Which of the following mutations arise without exposure to external agents?

None of these
Induced mutations
Spontaneous mutations
Analogous mutations

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

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

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

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

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

nonsense mutation
missense mutation
frameshift mutation
all of these

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DNA Sequencing, Mutation and Repair
Genetic variations are

influenced by the environment
not heritable
temporary
stable

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