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Question

Which of the following best represents Expressed Sequence Tags (ESTs)?

A
Novel DNA sequences
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B
Genes expressed as RNA
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C
DNA polymorphism
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D
All of these
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Solution

The correct option is B Genes expressed as RNA
There were two major approaches with respect to the methods involved during the sequencing of the entire human genome.

One approach aimed at identifying all the genes that are expressed as RNA.
These are called Expressed Sequence Tags or ESTs.

Another approach called sequence annotation tried to sequence the whole set of the genome that contained all the coding (exons) and non-coding (introns) sequences.

Novel DNA sequences are the genomic sequences that have emerged recently.

DNA Polymorphism refers to the two or more variants of a particular DNA sequence and it arises due to mutations.

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