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.
In the United States, students must first get a bachelor's degree before attending medical school, and the average medical student's debt is $155,000. Then come at least three years of residency, which usually pays less than $50,000 a year. After all that, it's no wonder doctors feel entitled to six-figure salaries.