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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?

Induced mutations
Spontaneous mutations
Analogous mutations
None of these

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DNA Sequencing, Mutation and Repair
What was the first eukaryotic chromosome to be sequenced?

Yeast chromosome XI
None of these
Yeast chromosome III
Arabidopsis chromosome IV

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DNA Sequencing, Mutation and Repair
Genetic variations are

not heritable
stable
temporary
influenced by the environment

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

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

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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
phosphorylation
photosynthesis
photoreactivation

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

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

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