Hank imagines himself breaking into the Hot Pockets factory to steal their secret recipes and instruction manuals in order to help us understand how the processes known as DNA transcription and translation allow our cells to build proteins.

Why are GMOs bad? They aren't. They just aren't, not intrinsically, and certainly not for your health. We've been eating them for decades with no ill effects, which makes sense, because a genetically modified organism is simply an...

Do We Have to Get Old and Die?

Paul Andersen explains how catalysts can speed up a reaction without being consumed in the reaction. Catalysts can lower the activation energy of reaction be stabilizing the transition state. They can also create new reaction pathways...

In which Hank does some push ups for science and describes the "economy" of cellular respiration and the various processes whereby our bodies create energy in the form of ATP.

The Amoeba Sisters explain enzymes and how they interact with their substrates. Vocabulary covered includes active site, induced fit, coenzyme, and cofactor. Also the importance of ideal pH and temperatures for enzymes are discussed.

Why do apples turn brown after you cut them, or when they rot? Basically for the same reason that human hair, eyes and skin is brown, too. Not that we're calling you rotten. Quick Questions explains!

Hank describes the desperate need many organisms have for nutrients (specifically nitrogen and phosphorus) and how they go about getting them via the nitrogen and phosphorus cycles.

Scientists have had a variety of hypotheses about how chemical stress can affect DNA to cause aging, but a new study has just shown the process in action.

Spit is critical for our health. Actually.

Paul Andersen explains how enzymes are used to break down substrates. The correct shape of the active site allows a key/lock fit between the enzyme and the substrate. The enzyme catalase is used to break down hydrogen peroxide. The...

Blood banks need a constant supply of donors to maintain their supply, but some enzymes that are already in our bodies might be able to help!

Howcast - Learn about lactose intolerance from gastroenterologist Lisa Ganjhu, M.D. in this Howcast video about stomach problems and digestive disorders.

Howcast - Keep your sink drain flowing and grease-free by periodically cleaning your sink drain.

Howcast - Learn what is the best natural face mask for you from organic beauty products expert Spirit Demerson in this Howcast beauty video.

Howcast -Check out this walkthrough for the open world brawler, Batman: Arkham City, made by Rocksteady, beat Penguin and kick Solomon in the Grundy.

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Pineapple is the only food known to contain bromelain, an enzyme that digests protein. The truth is, pineapple hurts to eat because bromelain is digesting the tender skin inside of your mouth. + We can also include a lifehack on how to...

A restriction map is a map of known restriction sites within a sequence of DNA. Restriction mapping requires the use of restriction enzymes. In molecular biology, restriction maps are used as a reference to engineer plasmids or other...

The sodium-potassium pump uses active transport to move molecules from a high concentration to a low concentration. The sodium-potassium pump moves sodium ions out of and potassium ions into the cell. This pump is powered by ATP. For...

Blood grouping is based on the presence of specific antigens—A, B, and H—on red blood cells, encoded by the ABO gene system. Individuals with blood type A have A antigens and anti-B antibodies, B has B antigens and anti-A antibodies, AB...

Practice life sciences questions using real examples from 2012.

The ABO gene on chromosome 9 encodes enzymes that determine an individual’s blood group by modifying the H antigen into A or B antigens via glycosyltransferases. The A allele produces an enzyme that adds N-acetylgalactosamine (GalNAc),...

Unlike SDS–PAGE, which denatures proteins, native or buffer gels maintain proteins in their functional state, allowing detection of enzymes based on biological activity. Proteins are separated by their native charge and size, and enzyme...