Mr. Sexton's Science Outpost

Nature is worth knowing.

Match the Molecule

Here are images (DON’T READ THE CAPTIONS YET!) of three important biological macromolecules.

One of them is a nucleic acid.

One of them is a protein (the most abundant protein on Earth!).

One of them is a little bit of both, a ribonucleoprotein.

Can you guess which one is which before you read the captions?

Protein ribbon structure of Rubisco

Rubisco is the nickname of the protein Ribulose-1,5-bisphosphate carboxylase oxygenase

Over the course of evolutionary time, regions of the ribosome in different species have been added while conserving the functional core.

Over the course of evolutionary time, regions of the ribosome in different species have been added while conserving the functional core.

The molecular structure of DNA is like a twisted ladder.

The double helix structure of deoxyribonucleic acid, or DNA, is like a twisted ladder where the sides of the ladder are composed of sugar and phosphate units linked by covalent bonds, and the rungs of the ladder are made of the four nitrogenous bases linked by hydrogen bonds.

Study Reveals Evolution of the Ribosome in New Detail

What good is DNA without a ribosome?  Considering how the ribosome has changed over the last 4 billion years gives insight to the crucial nature of its role in biology, the unity of all life, and the process of evolution.

http://www.sciencedaily.com/releases/2014/06/140630164012.htm

In the new study, Williams and Research Scientist Anton Petrov compared three-dimensional structures of ribosomes from a variety of species of varying biological complexity, including humans, yeast, bacteria and archaea. The researchers found distinct fingerprints in the ribosomes where new structures were added to the ribosomal surface without altering the pre-existing ribosomal core from the last universal common ancestor.140630164012-large

For a video on the origins and evolution of the ribosome, visit:https://www.youtube.com/watch?v=ei6qGLBTsKM

Adventures in WordPress

Hello World.  Welcome to my new website that is currently being developed using WordPress.  WordPress is open-source software (that means FREE!) that allows website novices like me to build and maintain a full-featured websites with little or no coding knowledge.  I am currently enrolled in a course through The Heritage Institute titled Build Your Website Now! instructed by Michael Boll of www.innovativepd.com.  Hopefully this course will lead to a great website for my students and their parents!

Updated: July 1, 2014 — 8:28 pm
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