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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Which of the following mutation affects only a single nucleotide?

Regional mutation
Site mutation
Aerial mutation
Point mutation

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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
Which of the following mutations arise without exposure to external agents?

Analogous mutations
Spontaneous mutations
Induced 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
Changes in which of the following characterizes mutations?

Both (a) and (b)
Genotype
Phenotype
None of these

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

cause premature termination of the mRNA
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

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