The basic building block of DNA is called a NUCLEOTIDE. A nucleotide is made up of one sugar molecule, one phosphate molecule and one of the four bases. Here is the structural formula for the four nucleotides of DNA. Note that the purine bases (adenine and guanine) have a double ring structure while the pyrimidine bases (thymine and cytosine) have only a single ring.
Medium. To prepare a medium steak on the grill, cook to an internal temperature of 160 degrees Fahrenheit. When you press the steak, it should feel slightly firm with a pink center and a grayish burn on the outside. As a general rule, cook a 1-inch steak to medium by leaving it on the grill for 2 to 3 minutes per side.ell Done. A well-done steak needs an internal temperature of 170 degrees Fahrenheit. To reach this internal temperature, you need to leave the steak on the grill for 4 to 5 minutes per side for a 1-inch steak or 8 to 9 minutes for a steak measuring 1 3/4 inches.
About 45 minutes before grilling, start the fire. This refers to real grills, which use the coals of wood, lump or even briquettes. Even for gas grills, however, it is important to pre-heat them. No matter what the heat source, the temperature should be as high as reasonably possible: 700F or more at the grill level.