AtheistKiwi wrote:In a You Tube discussion on a video about Intelligent Design, a user brought up (as evidence for ID) "Homochirality and Racemic mixtues", which appear to be two obscure chemistry theory that are beyond my knowledge. I am not able to work out if these are serious, or ID crap.
In organic chemistry, this is quite common and is not at all an obscure chemistry theory.
Many organic (containing carbon) compounds have various geometric forms which is referred to as chirality. A compound is chiralic when it is not superimposable upon its mirror image due to containing an asymmetric carbon atom. Take cyclohexane... it has two different geometries... a "boat" and "chair" geometric form. Homochiriality means that there is only a single geometric form present... In biological systems, an enzyme uses one form of a compound to build a particular structure because the enzyme can only attached to a specific geomtry. Think of it this way - you have a peg board with only round holes (enzyme). The compound used has two shapes (say squares and round) - so only the round version of the compound is used.
Racemic mixtures, or racemates basically means a true 1:1 mixture of chirality types, which under polarized light, shows no change due to rotation of the light source (IIRC)
How either of this supports ID, I have no freaking clue. Odds are the ID supporter has a poor understanding of organic chemistry or is just parroting some other ID talking head that has poor understanding of organic chemistry (ID crap as you put it).