Question

select the correct answer from each drop-down menu. rna primase synthesizes rna primer that attaches itself at the initiation point of replication. rna primer constructed during dna replication needs to be replaced because rna differs from dna. it contains uracil instead of (drop - down options: adenine, guanine, thymine).

Explanation:

In DNA, the nitrogenous base is thymine (T), while in RNA, the corresponding base is uracil (U). So RNA contains uracil instead of thymine. Among the options (adenine, guanine, thymine), thymine is the base present in DNA but not in RNA (RNA has uracil instead).

Answer:

thymine