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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
When mutations involve vital functions so that the mutants are nonviable, it is a

transversion
lethal mutation
nonsense mutation
none of these

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DNA Sequencing, Mutation and Repair
Changes in which of the following characterizes mutations?

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

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

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

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

photosynthesis
excision repair
phosphorylation
photoreactivation

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

Excision repair
Photoreactivation
SOS repair
Never leads to mutation

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

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

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