JEE MAIN - Chemistry (2004 - No. 19)
Which base is present in RNA but not in DNA?
Uracil
Thymine
Guanine
Cytosine
Explication
$$RNA$$ contains cytosine and uracil as pyrimidine bases while $$DNA$$ has cytosine and thymine.
Both have the same purine bases i.e., Guanine and adenine.
Both have the same purine bases i.e., Guanine and adenine.