Sherlock: Holmes Has a New Partner in Season Four of PBS Series; Emmy Noms. Check out this first look of the fourth season of the Sherlock TV series from the BBC. Stateside, the detective drama airs on PBS.
Anabolic reactions build new molecules and/or store energy. The energy of catabolic reactions is used to drive anabolic reactions. The energy for chemical reactions is stored in ATP. Often when I ask students What is ATP the answer they give is Energy.
Everything you do needs energy to drive it, whether it is running up a flight of stairs, eating breakfast, fighting off an infection, or even just producing new proteins for hair growth. The energy currency used by all cells from bacteria to man is adenosine triphosphate (ATP). Every process within an organism â DNA and protein synthesis, muscle contraction, active transport of nutrients and ions, neural activity, maintenance of osmosis, carbon fixation â requires a source of ATP. Why is ATP such a good source of energy? ATP is a nucleoside triphosphate (ribose sugar, adenine base and three phosphate groups), where a high-energy bond attaches the third phosphate group to the molecule. This bond is highly unstable, and when it is hydrolysed it releases a substantial amount of free energy (approximately 7 kcal/mole).