what does DNA nucleotide consist of

what are the 4 bases

what does RNA nucleotide consist of

what are the 4 base in RNA

what is a polynucleotide

what is DNA made from

what is RN made from

describe semi conservative replication of DNA

why does the polymerase move in opposite directions

what evidence is there for semi conservative replication

what are introns

describe the 2 types of RNA