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.
1 You begin wheezing suddenly and cough up frothy pink or white phlegm; this may be a sign of heart failure. 2  You cough up bloody phlegm or you have a sharp, localized chest pain (pleurisy); this could be a sign of pulmonary embolism.