The new cryo-electron microscopy technology is an imaging technique which provides a 3D image of proteins.
Scientists do not have a definite answer to that but they do know that Earth’s atmosphere in the ancient times was extremely different from the present time. After conduction of various experiments, scientists have deduced the fact that the Earth’s atmosphere has changed over time to accumulate life.
RNA or ribonucleic acid is essential for our health. RNA and DNA are like twins. RNA is more like a copy or a transcription of DNA. DNA is vital as it contains all the information that is essential for the generation of new cells and for maintain life but it never leaves the nucleus of the cell.