Question
Biology Question on Human genome project
Expressed Sequence Tags (ESTs) refers to
A
All genes that are expressed as proteins.
B
All genes whether expressed or unexpressed.
C
Certain important expressed genes.
D
All genes that are expressed as RNA.
Answer
All genes that are expressed as RNA.
Explanation
Solution
ESTs are short DNA sequences derived from the complementary DNA (cDNA) of the messenger RNA (mRNA) molecules. They represent portions of expressed genes, providing insight into which genes are being actively transcribed and translated into proteins within a specific cell or tissue. ESTs have been used for gene discovery, expression profiling, and mapping genes to specific chromosomal locations.
Therefore, The correct option is (D): All genes that are expressed as RNA.