Which reason is the MOST plausible for why most hexoses of living organisms are D isomers?
A) D isomers are more energetically favorable.
B) D isomers are also used by amino acids.
C) Sugars must be opposite isomers from amino acids.
D) Evolving enzymes were made to remain with an initial preference.
E) Evolving enzymes switch preference often to find the best isomer.

Question

Quizplus · Accepted Answer

Evolving enzymes were made to remain with an initial preference. As enzymes evolved to recognize specific isomers, they became optimized to recognize the D isomers, which led to a bias towards D isomers in living organisms. This preference is likely to be maintained over time as it is energetically costly to redesign enzymatic pathways.

Which Reason Is the MOST Plausible for Why Most Hexoses