Why were nobles angry at king john

Starved his opponents to death, imprisoned his wife, murdered his own nephew, and he was making people pay really heavy taxes so that he could pay for his riches.

When they wanted King John to sign it, he refused. So the barons rebelled. The King 'went into hiding' for a few days The barons threatened to cut his throat and because he was a practical man, he gave in. He then met the barons at Runnymede and signed the Magna Carta to make peace with the barons

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.