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.
1 When grilling chicken with direct heat on a gas grill, all of the burners are turned on to provide a uniform temperature under the entire cooking surface (grate). 2  Chicken is cooked over burners set on medium heat. The cooking temperature typically reaches 450ÂºF to 650ÂºF when grilling over direct heat. 2  Thin pieces of chicken are quickly grilled over these temperatures, so check often and watch carefully for visual signs of doneness.