Answer :
I believe the answer is no because DNA has repair mechanism to replace the damaged nucleotides. DNA replication is a process that involves synthesis of a new DNA molecule from another DNA stand which acts as a primer. DNA polymerase is the enzyme that catalyses this activity, the enzyme checks out the work done by checking each nucleotide added. This process is called proofreading.
Yes, the answer is "No, because telomeres act as protection on the ends of DNA molecules so the code is preserved.