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.
  Becoming a doctor requires more training than most other jobs. It usually takes at least 11 years to become a doctor: 4 years of college, 4 years of medical school, and â¦ 3 years working in a hospital. For some specialties, doctors may have to work in a hospital for up to 8 years before they are trained.fter Med school (and after you pass your boards - long difficult tests) you are a Doctor but that doesn't mean that you practice anywhere. You can't get a real job without experience. So you get a (low paying) job as a Resident at a hospital for 1 to, sometimes as much as, 7 years. This is the typical scenario.