ATP transports chemical energy within cells for metabolism. It is one of the end products of photophosphorylation, cellular respiration, and fermentation and used by enzymes and structural proteins in many cellular processes, including biosynthetic reactions, motility, and cell division.TP transports chemical energy within cells for metabolism. It is one of the end products of photophosphorylation, cellular respiration, and fermentation and used by enzymes and structural proteins in many cellular processes, including biosynthetic reactions, motility, and cell division.
Perhaps the most well known event that occurred recently on this day was in 1998 when President Clinton was impeached for lying to a grand jury about his affair with Monica Lewinski. All of this, along with more, is explained in the This Day in History Video: December 19th.
Bill Clinton (1993-2001), the 42nd President, was the second President to be impeached. In 1998 Clinton was impeached by the U.S. House of Representatives but acquitted by the Senate. Andrew Johnson was impeached by the U.S. House of Representatives in 1868, but he was also later acquitted by the Senate.