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.
How many years of college does it take to be a doctor? It usually takes somewhere between 11 and 16 years to become a practicing M.D. After four years at an accredited college and four years at a medical school, a doctor must complete a residency of three or more years.