nuclease - general term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units. 1  endonuclease - a nuclease that cleaves nucleic acids at interior bonds and so produces fragments of various sizes. exonuclease - a nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acid. enzyme - any of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions.
1 gram of fat = 9 calories. Each gram of fat contains 9 calories. In general carbs are 4 cal per gram, as is protein and fat is 9 cal per gram. 16 people found this useful.
Fat is 9 calories per gram whereas protein and carb are only 4 calories per gram. I assume that Dr. Mercola is referring to the calorie distribution -- more than half our calories to come from fat. This allows for an appealing variety of foods and needn't be too heavy.