All of biology functions around the core of DNA, RNA and Proteins or the so called Central Dogma of Molecular Biology. The key here is that you always go in the order of DNA→RNA→protein. You can’t jump from DNA to protein or visa versa; it just doesn’t happen. However, you don’t have to go all the way. Just because you made RNA doesn’t automatically mean it will be a protein. This is also not necessarily a one-to-one relationship. One RNA can be used to make several copies of the exact same protein.
Why do I care?
Because a gene can be looked at in each step of the DNA→RNA→protein progression. We look at all the different steps because how a gene is functioning can be regulated or changed at any point. However, in all cases, we are still interested in the gene.
Biological Levels are also explained through the analogy of a book.Continue reading