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