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DNA Sequencing, Mutation and Repair

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

Spontaneous mutations
Induced mutations
Analogous mutations
None of these

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DNA Sequencing, Mutation and Repair
Genetic variations are

temporary
influenced by the environment
not heritable
stable

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

excision repair
photosynthesis
photoreactivation
phosphorylation

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DNA Sequencing, Mutation and Repair
A nonsense mutation introduced into the DNA sequence of a gene may

shorten the length of the protein encoded by the gene
cause a shift in reading frame
have no effect on the transcript or protein made
cause premature termination of the mRNA

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

SOS repair
Excision repair
Photoreactivation
Never leads to mutation

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

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

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