What do a human, a rose, and a bacterium have in common? Each of these things — along with every other organism on Earth — contains the molecular instructions for life, called deoxyribonucleic ...

Science is rarely straightforward. Many times, scientists embark on a study looking for evidence for a particular hypothesis, ...

A second major difference between the two substances is that RNA is made in a single-stranded, nonhelical form. (Remember, DNA is almost always in a double-stranded helical form.) Furthermore ...

Whether this bizarre form of DNA existed in cells and had any function, and what that might be, was hotly debated for nearly half a century. But research has recently confirmed its biological ...