The twisted ladder metaphorA DNA molecule is often likened to a spiral (or twisted) ladder. In this analogy, the rungs of the ladder are the base pairs (A-T and G-C). The sides of the ladder are the sugar-phosphate backbones of the two strands.This refers to B form DNA. molecule of DNA is double-stranded. The molecule has the shape of a double helix, typically right handed (B form DNA).
FRESH PORK: Safe Cooking Chart. Cook all raw pork steaks, chops, and roasts to a minimum internal temperature of 145 Â°F as measured with a food thermometer before removing meat from the heat source. For safety and quality, allow meat to rest for at least three minutes before carving or consuming.
1 Place the roast in a roasting pan with the fatty side up. 2  Preheat the oven to 500 degrees F (260 degrees C). 3  Bake the roast for 20 minutes in the preheated oven, then reduce the temperature to 325 degrees F (165 degrees C), and continue roasting for an additional 60 to 75 minutes.