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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Genetic variations are

not heritable
temporary
influenced by the environment
stable

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DNA Sequencing, Mutation and Repair
Which of the following mutation affects only a single nucleotide?

Site mutation
Regional mutation
Aerial mutation
Point mutation

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

an abnormal elongation of a polypeptide
modification of mRNA
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
Which of the following(s) is/are steps in excision repair mechanisms?

Incision
All of these
Ligation
Excision

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

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

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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
all of these
frameshift mutation

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