A liver cell and a cheek cell have the same chromosomes. The only cells in the human body that do not contain 46 chromosomes are reproductive cells, which only contain 23 chromosomes, according to... Star Gazing
A beef roast cooked to medium-rare should have an internal temperature of 145Â°F - 150ÂºF after the resting period, and a roast cooked to medium should have an internal temperature of 150Â°F to 160ÂºF. (See the note below). See Beef Doneness for more information on proper cooking temperatures.
Do not cover the roast and do not add any liquid (liquid is used for braising, not roasting). Allow the beef to roast at 450Â°F for 45 minutes and then begin checking the internal temperature of the meat with a meat thermometer.