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DNA Sequencing, Mutation and Repair

DNA Sequencing, Mutation and Repair
Genetic variations are

influenced by the environment
stable
not heritable
temporary

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DNA Sequencing, Mutation and Repair
Differentiation of four different bases in automated sequencing systems is that each base has

cytosine at start
different radioactive tag
distinctive fluorescent tag
unique antibody bound to it

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

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

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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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DNA Sequencing, Mutation and Repair
Frame shift mutation may occur as a result of

deamination of cytosine to uracil
conversion of guanine to xanthine
None of these
formation of a thymine-dimer

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

all of these
missense mutation
nonsense mutation
frameshift mutation

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