ATTAAAGGTT TATACCTTCC CAGGTAACAA ACCAACCAAC TTTCGAT...
is part of the 5'UTR of genome of an RNA virus SARS-Cov-2.
RNA contains letters C
+G
+A
+U
.
DNA contains letters C
+G
+A
+T
.
Why are there letters T
, in the SARS-Cov-2 genome, instead of U
?