The Main Problem

I've suggested that for life to begin there must have been
some symbiosis between the linking of amino acids and proto tRNA.
This may be it:

"The facile abiotic synthesis of amino acids does present one problem.
These syntheses are not restricted to the formation of a-amino acids:  B-amino
acids, hydroxy acids, and simpler carboxylic acids also are formed. If the
simulated abiotic syntheses correctly reflect events on the primitive Earth,
then there must have been some mechanism for the selection of the a-amino acids
from all the other acids present." (Biochem, Zubay)

Perhaps the proto tRNA in some way bonded (h-bonds?) to the
amino acids in a way that favored the formation of a -amino acids.
That would be the mechanism that we are looking for.
That would then favor not only a-amino acids but tRNA too.
And that could conceivably evolve to the symbiosis we have now between the two.

Comment?