protein

/Tag: protein
29 05, 2017

What is RNA? Cell biology and evolution

By |2018-04-16T00:39:56-07:00May 29th, 2017|Biology - Evolution, from cells to modern mammals, birds, and reptiles|0 Comments

RNA molecule: A single strand of RNA, seen under an electron microscope The RNA molecule was probably one of the earliest steps towards life on Earth. RNA is short for "ribonucleic acid". That's a very long, complicated molecule made out of amino acids linked together. The amino acids are made out of atoms of [...]

26 05, 2017

What is a muscle? Biology and Evolution

By |2017-05-26T23:42:02-07:00May 26th, 2017|Biology - Evolution, from cells to modern mammals, birds, and reptiles|0 Comments

A black woman shows off her muscles One-celled creatures don't have any muscles; the ones that can move themselves use flagellae instead. Even after living creatures evolved that had a lot of cells, the early ones like hydras and sponges couldn't move. The earliest creatures that had muscles and could move on their own [...]