Expressed Sequence Tags (ESTs) refers to :

Novel DNA sequences

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Genes expressed as RNA

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Polypeptide expression

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DNA polymorphism

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Solution

The correct option is B Genes expressed as RNA
Expressed Sequence Tags or ESTs are genes that are expressed as RNA in the body. ESTs represent portions of expressed genes. They may be represented as either cDNA/mRNA sequence or as the reverse complement of the mRNA, the template strand.

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