Like DNA, RNA contains four nitrogenous bases. Three of them are the same as those found in DNA. The one that is different is called .
The five-carbon sugar in RNA is called .

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."