Cellular rejuvenation is best described as

• A. Replacing damaged cells with stem cells
• B. Restoring cell function by repairing damage or metabolism; still mostly in lab research
• C. Copying the mind into computers
• D. Freezing the body

Answer: (B)

Cellular rejuvenation focuses on reviving aging cells by repairing the damage and metabolic changes that accumulate over time, so the cells function more like younger ones. The aim is to restore existing cells to health rather than replacing them with new cells. In practice, this area is largely experimental, with researchers exploring ways to fix DNA damage, improve mitochondrial function, and optimize cellular metabolism. That’s why this description best fits: it centers on restoring cell function within the cells we already have. Replacing damaged cells with stem cells describes regenerative therapies that introduce new cells instead of reviving old ones. Copying the mind into computers is a digital concept, not a cellular process, and freezing the body is about preservation rather than reversing cellular aging today.