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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Genetic variations are

influenced by the environment
temporary
not heritable
stable

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DNA Sequencing, Mutation and Repair
Which of the following(s) is/are steps in excision repair mechanisms?

Excision
Ligation
All of these
Incision

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

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

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DNA Sequencing, Mutation and Repair
Which of the following mutations arise without exposure to external agents?

Analogous mutations
Induced mutations
Spontaneous mutations
None of these

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DNA Sequencing, Mutation and Repair
Which of the following bacterial genome was sequenced first?

S. pneumoniae
H. influenzae
S. thermophilus
E. coli

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

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

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