Hello everyone. My name is Dr. Douglas Houston,
I'm a lecturer at Edinburgh University.
Today, I'm going to be talking about "The Biochemistry of DNA and RNA".
Part 1 looked at the chemistry of these molecules and for this Part 2,
we are going to be looking at their expression and biological function.
So that's fundamental chemistry of DNA structure and also protein DNA interaction.
So let's zoom out a little and see exactly how DNA works at,
I guess, a more biological level.
So here, we can see a schematic or flowchart which I'm guessing will probably have being
seen somewhere before because this often gets called the
central dogma of biology or biochemistry.
So this is the idea,
that we have a strand of DNA,
so this is the green line at the top.
This contains all of the information that is
needed to produce a protein from any particular gene.
That's called expression and that expression happened via transcription and translation,
which I'm sure you've encountered before.
So how exactly does a stretch of nucleotide bases in DNA,
how is it actually able to end up as
a very specific sequence of amino acids in a protein?