The fundamental difference between the two methods is that molecular cloning involves replication of the DNA in a living microorganism, while PCR replicates DNA in an in vitro solution, free of living cells.
Costs. Becoming a doctor is not cheap. Depending on your location and specialty, medical school alone can cost between $50,000 and $150,000, and thatâs only tuition.
It takes 11-14 years to become a doctor in the United States, including earning a bachelor's degree, attending 4 years of medical school, and completing a 3- to 7-year residency program after medical school. After residency, doctors may apply for a state license to practice medicine.