Cold sores are caused by a herpes virus. There are eight different kinds of human herpes viruses. Only two of these, herpes simplex types 1 and 2, can cause cold sores. It is commonly believed that herpes simplex virus type 1 infects above the waist and herpes simplex virus type 2 infects below the waist.
The DNA is tightly coiled many times around proteins called histones that support the chromosome structure. The bound DNA units are called nucleosomes. Different kinds of organisms have different numbers of chromosomes. Humans have 23 pairs of chromosomes, 46 in all: 44 autosomes and two sex chromosomes.Each parent contributes one chromosome to each pair, so children get half of their chromosomes from their mothers and half from their fathers.he bound DNA units are called nucleosomes. Different kinds of organisms have different numbers of chromosomes. Humans have 23 pairs of chromosomes, 46 in all: 44 autosomes and two sex chromosomes.
Found This Helpful. Deoxyribonucleic acid, or DNA, is the molecule that contains the genetic information in the cells of an organism. The subunits of a strand of DNA are called nucleotides.he genetic information is not used directly from the DNA. Ribonucleic acid (RNA) is used, and transcription is the process by which this code is copied from DNA into RNA (ribonucleic acid). Once it has been copied, then the genetic code can be read and expressed. The process is called translation.