According to which theory the ageing due to accumulation of harmful protiens
Answers
Many theories have been proposed to explain the process of aging, but neither of them appears to be fully satisfactory.
Modern biological theories of ageing in humans currently fall into two main categories: programmed and damage or error theories.
The programmed theories imply that ageing follows a biological timetable (regulated by changes in gene expression that affect the systems responsible for maintenance, repair and defense responses), and the damage or error theories emphasise environmental assaults to living organisms that induce cumulative damage at various levels as the cause of ageing[2].
These two categories of theory[3] are also referred to as non-programmed ageing theories based on evolutionary concepts (where ageing is considered the result of an organism’s inability to better combat natural deteriorative processes), and programmed ageing theories (which consider ageing to ultimately be the result of a biological mechanism or programme that purposely causes or allows deterioration and death in order to obtain a direct evolutionary benefit achieved by limiting lifespan beyond a species-specific optimum lifespan.