DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).The order of these bases is what determines DNA's instructions, or genetic code.NA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.
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. Cook the roast for about 10 to 15 minutes and then turn it over in the pan. 2  Continue to cook it for another 10 to 15 minutes for every pound. 3  Remove the tenderloin from the oven when the internal temperature of the meat reaches 140Â°F, as indicated on a meat thermometer inserted into the center of the roast.
Slow-Roasted Beef Standing Rib Roast Recipe: 200 degrees F For about Four Hours with a Bit of Salt and Pepper. 1. Take the beef out of the fridge a couple of hours before you want to roast it so it warms up to close to room temperature. When you are ready to roast the beef, preheat the oven to 250 degrees F.If your roast has a thick fat layer, score it in a criss-cross pattern. Season the roast with salt and pepper, and rub it in with your hands. Finish the roast off with a coating of vegetable oil, and rub that in as well.low-Roasted Beef Standing Rib Roast Recipe: 200 degrees F For about Four Hours with a Bit of Salt and Pepper. 1. Take the beef out of the fridge a couple of hours before you want to roast it so it warms up to close to room temperature. When you are ready to roast the beef, preheat the oven to 250 degrees F.