DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell.
You are watching a horror movie. The music changes to the familiar tune you recognize as a prelude to. danger. You tense up, your heart rate increases, your breathing becomes shallow, your mouth is dry.
Your heart is racing, you feel faint, sweaty, weak; your legs shake, you feel dizzy and scared...your initial reaction is 'I must be dying, having a heart attack!' BUT YOU'RE NOT!