00:03
So this question discussed about the structure of amino acid, which are the monomer of proteins.
00:09
So the question gave you the describe the common structure of amino acid and asks you which functional group act as an acid.
00:17
So there are four options, amino group, carbonsil group, hydroxyl group, and phosphate group.
00:22
So first of all, let's take a look at the structure of amino acid.
00:25
So there are 20 common amino acids.
00:29
They all have common structures and then also they have some unique structures.
00:35
So let's talk about common structures first.
00:37
So all amino acids will have the center carbon, we call alpha carbon, which is in the center.
00:44
Carbon has full bonds.
00:46
So that's why there are full functional group that connect to the central carbon.
00:50
So you will see the black one, amino, nh2, connect to the carbon, and then you have a hydrogen on top, and then you have a caboxyl group, which is c -o -o -h, connect to the carbon.
01:02
And then you have a side chain, we call it r...