Final answer:
In biology, amino acids prefer the L-form. However, there are exceptions and it depends on the specific amino acid.
Step-by-step explanation:
In biology, the preference for the form of amino acids is determined by whether they are D or L. The L-form of amino acids occurs naturally and is used by cells to build polypeptides and proteins. On the other hand, the D-form of amino acids is generally more stable to hydrolysis by naturally occurring enzymes. However, there are exceptions and it ultimately depends on the specific amino acid.