| 释义 |
nucleoid
nu·cle·oid N0186975 (no͞o′klē-oid′, nyo͞o′-)n. The undefined region of genetic material inside a prokaryotic cell, consisting of aggregated DNA.nucleoid (ˈnjuːklɪˌɔɪd) biologyn (Biology) the region of a prokaryotic cell where the cell's genetic component (nucleic acids) is locatedadj (Biology) resembling a nucleusnu•cle•oid (ˈnu kliˌɔɪd, ˈnyu-)
n. 1. the central region in a prokaryotic cell, as a bacterium, that contains the chromosomes and that has no surrounding membrane. adj. 2. resembling a nucleus. [1850–55]
nucleoid
nucleoid[′nü·klē‚ȯid] (cell and molecular biology) A discrete region within mitochondria, chloroplasts, and prokaryotes that contain molecules of deoxyribonucleic acid. (virology) The ribonucleic acid (RNA) core that is enveloped by a protein capsid in RNA tumor viruses. nucleoid
nucleoid [noo´kle-oid] 1. resembling a nucleus.2. a nucleus-like body sometimes seen in the center of an erythrocyte.3. the central region of a bacterium, consisting of a dense irregularly shaped region containing DNA material without a surrounding membrane" >nuclear membrane.4. the genetic material (nucleic acid) of a virus, situated in the center of the virion.nu·cle·oid (nū'klē-oyd), 1. Synonym(s): nucleiform2. A nuclear inclusion body. 3. Synonym(s): nucleus (2) [nucleo- + G. eidos, resemblance] nucleoid (no͞o′klē-oid′, nyo͞o′-)n. The undefined region of genetic material inside a prokaryotic cell, consisting of aggregated DNA.nucleoid A condensed body within a bacterium that contains the prokaryote’s genome.nu·cle·oid (nū'klē-oyd) 1. Synonym(s): nucleiform. 2. A nuclear inclusion body. 3. Synonym(s): nucleus (2) . [nucleo- + G. eidos, resemblance]nucleoid - the chromosomal region of a BACTERIUM. In ESCHERICHIA COLI it comprises mainly DNA with some PROTEINS (analagous to, but not HISTONES) and RNA. The structure is very compact and the DNA is folded into a series of loops, that are supercoiled (see SUPERCOILED DNA).
- the DNA mass in the CHLOROPLAST or MITOCHONDRION.
- the core of ribonucleic acid and protein in the virion of a RETROVIRUS.
nu·cle·oid (nū'klē-oyd) 1. A nuclear inclusion body. 2. Synonym(s): nucleus (2) . [nucleo- + G. eidos, resemblance] |