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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?

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

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

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

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

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

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DNA Sequencing, Mutation and Repair
Genetic variations are

not heritable
influenced by the environment
stable
temporary

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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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