Q.

Expressed Sequence Tags (ESTs) refers to                       [2023]

1 all genes whether expressed or unexpressed  
2 certain important expressed genes  
3 all genes that are expressed as RNA  
4 all genes that are expressed as proteins  

Ans.

(3)

Expressed sequence tag is one of the major approach of human genome project methodology. It is focused on identifying all the genes that are expressed as RNA.