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

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

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DNA Sequencing, Mutation and Repair
Due to which of the following DNA repair mechanisms, one is able to distinguish newly synthesized DNA strands from older one?

Old strands are methylated while new strands are not
New strands do not contain cytosine bases
New strands are methylated while old strands are not
New strands are lower in molecular size

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