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.
Heartburn, which occurs when the valve (sphincter) between the esophagus and the stomach becomes weak or relaxed allowing stomach acid to back up into the esophagus, can cause a burning sensation in the chest and throat, nausea, a bitter taste in the mouth and other unpleasant symptoms.