1. One aspect of aging appears to be related to telomeres. Every time a chromosome is duplicated in the S Phase of interphase, the ends of the chromosome (i.e. telomeres) unravel. This sets a limit of around 50 cell divisions before the chromosome unraveling effects genes. Explain the significance of this.

2. What is the difference between DNA, chromatin, and chromosomes? What is the significance of each form?