HELP ASAP
1.which of the following is always single stranded?
a dsRNA
B DNA
C mRNA
D DNA AND RNA

2 which of the following is a difference between DNA and RNA?
a RNA has thymine
b RNA contains lipids
c most types of RNA are double stranded
d they have different sugars

3 which of the following bases are found in RNA but not DNA?
a guanine
b cytosine
c adenine
d uracil