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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Genetic variations are

stable
influenced by the environment
not heritable
temporary

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DNA Sequencing, Mutation and Repair
The mutation which will not affect the length of a protein is,

missense mutation
nonsense mutation
frameshift mutation
all of these

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

SOS repair
Never leads to mutation
Photoreactivation
Excision repair

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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 premature termination of the synthesis of a polypeptide
a large deletion within the reading frame of a gene

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DNA Sequencing, Mutation and Repair
The promoter on an expression vector used to overproduce proteins in bacteria is

a bacterial promoter
the natural promoter of the gene being cloned
expressed both in bacteria and mammalian cells
not a regulated promoter

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

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

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