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DNA Sequencing, Mutation and Repair

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
A nonsense mutation may result into

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

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

photoreactivation
photosynthesis
excision repair
phosphorylation

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

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

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

Induced mutations
None of these
Analogous mutations
Spontaneous mutations

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DNA Sequencing, Mutation and Repair
Differentiation of four different bases in automated sequencing systems is that each base has

different radioactive tag
unique antibody bound to it
cytosine at start
distinctive fluorescent tag

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