Teacher: Yes. So, a molecule is a word we use to represent the simplest unit of some compounds. These little red blobs represent the oxygen atoms. And then the two white circles, they represent ...

A red molecule approaches an indentation in the receptor. The membrane consists of two layers of molecules with purple heads on the exterior and orange tails together on the interior. Credit ...

Scientists still needed to figure out this molecule's structure to be sure, and to understand how it worked. In 1948, Linus Pauling discovered that many proteins take the shape of an alpha helix ...

Teacher: Yes. So, a molecule is a word we use to represent the simplest unit of some compounds. These little red blobs represent the oxygen atoms. And then the two white circles, they represent ...

Within every cell (except red blood cells) is a nucleus -- a sphere-like structure separated from ... To fit such a long molecule within the tiny space of the nucleus, DNA bends and loops in ...