A debt-to-GDP ratio of 60% is quite often noted as a prudential limit for developed countries. This suggests that crossing this limit will threaten fiscal sustainability. For developing and emerging economies, 40% is the suggested debt-to-GDP ratio that should not be breached on a long-term basis.
1 Telomerase is found in high levels in germline cells (egg and sperm) and stem cells. 2  In these cells telomere length is maintained after DNA replication and the cells do not show signs of ageing. 3  Telomerase is also found in high levels in cancer cells.
What Research Tells Us About Telomere Shortening & Aging. In population level studies, researchers have found that older people have shorter telomeres. Eventually, the cells with shorter telomeres can no longer replicate. This affects more and more cells over time, leading to tissue damage and the dreaded signs of again. Most cells can replicate approximately 50 times before the telomeres become too short.