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.
Move the roast beef onto a serving tray to rest for 10 to 15 minutes. Its temperature rises another 5 to 10 degrees, putting it at 130 to 135 F for a perfectly pink medium-rare. Juices also get reabsorbed into the muscle fibers during resting, sparing you the unfortunate loss of flavor and moisture that results when unrested beef is cut.