Which cells do not age?

• A. Sperm and Cancer cells
• B. Red blood cells and neurons
• C. Liver cells and skin cells
• D. Sperm and Cancer cells

Answer: (D)

The idea here is understanding which cells don’t undergo aging in the same way as most somatic cells. Cancer cells often bypass aging by reactivating telomerase, which rebuilds their telomeres and prevents the usual senescence checkpoints, allowing them to keep dividing. Sperm cells are also produced continuously from germline stem cells in the testes, giving a steady supply of young gametes rather than aging mature somatic cells. So together, these two types are described as not aging like other body cells. The other options include cells with finite lifespans or that age through wear and damage, such as red blood cells, neurons, liver cells, and skin cells, which do not share this un-aging behavior in the same way.