291 | Venki Ramakrishnan on the Biology of Death and Aging

566.067 - 599.734 Venki Ramakrishnan

Before DNA was used to encode genetic information, life probably began as an RNA cell. world because RNA can both carry out catalysis or chemical reactions, but it can also store genetic information. And the earliest ribosomes were probably made just of RNA and were somehow used to make small random proteins. And eventually a coding mechanism evolved so that you started making coding proteins.