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Expressed Sequence Tags (ESTs) refers to
All genes that are expressed as RNA.
All genes that are expressed as proteins.
All genes whether expressed or unexpressed.
Certain important expressed genes.
Answers (1)
The correct option is Option 1) All genes that are expressed as RNA.
Expressed Sequence Tags (ESTs) are short DNA sequences that are generated from complementary DNA (cDNA) libraries. These sequences represent fragments of messenger RNA (mRNA) molecules that have been transcribed from expressed genes in a specific tissue or organism.
ESTs are obtained by converting mRNA into cDNA using the enzyme reverse transcriptase. The cDNA is then cloned into a vector and sequenced. These sequences provide information about the genes that are actively transcribed and expressed in the tissue or organism from which the mRNA was isolated.
ESTs are particularly useful in gene discovery and gene expression studies. They provide valuable insights into the identity and expression patterns of genes, allowing researchers to identify and study genes that may be involved in specific biological processes or diseases.
Therefore, ESTs refer to all genes that are expressed as RNA, as stated in Option 1.
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