Dictionary entry overview: What does umbel mean? â¢ UMBEL (noun) The noun UMBEL has 1 sense: 1. flat-topped or rounded inflorescence characteristic of the family Umbelliferae in which the individual flower stalks arise from about the same point; youngest flowers are at the center Familiarity information: UMBEL used as a noun is very rare.
DNA replication occurs during the S stage of interphase. Interphase is the stage between two mitotic or meiotic divisions. It can be slpit into three stages:G1, S and G2. During G1 (gap 1), cells grow and build up ATP on preparation for DNA replication. During the S (synthesis) phase the DNA is replicated. During the G2 phase the cell prepares itself for the process of cell division (mitosis or meiosis). See: http://www.emc.maricopa ....
The Lytic Cycle. In the lytic cycle, which is considered the main cycle in viral replication, once the viral DNA enters the cell it transcribes itself into the host cell's messenger RNAs and uses them to direct the ribosomes. The host cell's DNA is destroyed and the virus takes over the cell's metabolic activities.