1. DNA:
A-G-G-C-C-T-G-C-T-T-A-A
mRNA:

A = aggcc if not than dna = ffgahhh

The accident and health policy provision that addresses preexisting conditions is the time limit on certain defenses. 
Time limit on certain defenses is a provision that must, by law be included in all individual health policies. The provision limits the length of time the insurer has to claim that the insured's claim was caused by a pre-existing condition that was not reported at a certain particular time.