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nucleus    音标拼音: [n'ukliəs]
n. 核心,核子,原子核,中坚

核心,核子,原子核,中坚

nucleus
核( 心 ); 核心; 核心程序; 核

nucleus
核心

nucleus
n 1: a part of the cell containing DNA and RNA and responsible
for growth and reproduction [synonym: {nucleus}, {cell
nucleus}, {karyon}]
2: the positively charged dense center of an atom
3: a small group of indispensable persons or things; "five
periodicals make up the core of their publishing program"
[synonym: {core}, {nucleus}, {core group}]
4: (astronomy) the center of the head of a comet; consists of
small solid particles of ice and frozen gas that vaporizes on
approaching the sun to form the coma and tail
5: any histologically identifiable mass of neural cell bodies in
the brain or spinal cord
6: the central structure of the lens that is surrounded by the
cortex [synonym: {lens nucleus}, {nucleus}]

Nucleus \Nu"cle*us\, n.; pl. E. {Nucleuses}, L. {Nuclei}. [L., a
kernel, dim. fr. nux, nucis, nut. Cf. {Newel} post.]
[1913 Webster]
1. A kernel; hence, a central mass or point about which
matter is gathered, or to which accretion is made; the
central or material portion; -- used both literally and
figuratively.
[1913 Webster]

It must contain within itself a nucleus of truth.
--I. Taylor.
[1913 Webster]

2. (Astron.) The body or the head of a comet.
[1913 Webster]

3. (Bot.)
(a) An incipient ovule of soft cellular tissue.
(b) A whole seed, as contained within the seed coats.
[1913 Webster]

4. (Biol.) A body, usually spheroidal, in a eukaryotic cell,
distinguished from the surrounding protoplasm by a
difference in refrangibility and in behavior towards
chemical reagents, which contains the chromosomal genetic
material, including the chromosomal DNA. It is more or
less protoplasmic, and consists of a clear fluid
(achromatin) through which extends a network of fibers
(chromatin) in which may be suspended a second rounded
body, the nucleolus (see {Nucleoplasm}). See {Cell
division}, under {Division}.
[1913 Webster PJC]

Note: The nucleus is sometimes termed the endoplast or
endoblast, and in the protozoa is supposed to be
concerned in the female part of the reproductive
process. See {Karyokinesis}.
[1913 Webster]

5. (Zool.)
(a) The tip, or earliest part, of a univalve or bivalve
shell.
(b) The central part around which additional growths are
added, as of an operculum.
(c) A visceral mass, containing the stomach and other
organs, in Tunicata and some mollusks.
[1913 Webster]

112 Moby Thesaurus words for "nucleus":
Anlage, Kern, NMR, alpha particle, antibaryon, antilepton,
antimeson, atomic nucleus, atomic particle, axiom, axis, baryon,
basichromatin, beta particle, bud, center, center of action,
center of gravity, centroid, centrum, chromatin, chromatin strands,
core, dead center, diameter, diaphragm, egg, electron,
elementary particle, elixir, embryo, epicenter, equator, essence,
essential, flower, focus, fundamental, germ, germen, gist,
gravamen, heart, heterochromatin, hub, hypostasis, inner essence,
interior, karyosome, karyotin, kernel, lepton, loins, macronucleus,
marrow, mean, meat, median, medulla, meganucleus, meson,
metacenter, micronucleus, middle, midmost, midriff, midst, nave,
navel, neutron, nub, nuclear force, nuclear magnetic resonance,
nuclear particle, nuclear resonance, nucleolus, nucleon,
nucleosynthesis, nuts and bolts, omphalos, ovum, photon, pith,
pivot, plasmosome, postulate, principle, proton, quid, quiddity,
quintessence, rudiment, sap, seed, soul, spark, spermatozoon,
spirit, storm center, strangeness, strong interaction, stuff,
substance, the nitty-gritty, thick, thick of things, triton,
umbilicus, valence electron, waist, waistline, zone


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  • Proteins are made in ribosomes, but DNA is stored in the nucleus. How . . .
    RNA, specifically mRNA, copies genetic information from DNA and transports it to ribosomes for protein synthesis This process involves transcription in the nucleus and translation at ribosomes, where proteins are assembled using amino acids according to the mRNA sequence RNA is essential in connecting genetic information stored in DNA to the proteins that are ultimately produced in cells
  • In eukaryotic cells, which of the following contains DNA?
    In eukaryotic cells, DNA can be found in a few specific organelles: the nucleus, mitochondria, and chloroplasts Thus, the correct answer to the question is option 4, which states that the nucleus, chloroplast, and mitochondrion contain DNA Nucleus: The nucleus is the primary location where most of the cell's DNA is stored
  • Rank the following items in order from largest to smallest:
    Nucleus: The nucleus is a membrane-bound organelle found in eukaryotic cells It contains the cell's genetic material (chromosomes) and is often referred to as the control center of the cell
  • The diagram shows four different locations in an atom.
    In scientific discussions about atomic structure, it is widely accepted that protons and neutrons reside in the nucleus and account for the majority of an atom's mass, while electrons, which are found outside the nucleus, contribute negligible mass compared to protons and neutrons
  • Where are organelles like mitochondria and the Golgi apparatus found?
    Conclusion Mitochondria and the Golgi apparatus are not found in the nucleus, the plasma membrane, or within chloroplasts; they reside in the cytoplasm, which serves as the jelly-like medium that contains various organelles, enabling biochemical processes necessary for cell survival
  • Which is the correct pathway for protein synthesis?
    The correct pathway for protein synthesis is DNA → Nucleus → Ribosome → Golgi apparatus → Vesicle → Moved out of the cell, which aligns with Option C This process involves the transcription of DNA into mRNA, translation at the ribosome, modification in the Golgi apparatus, and finally, secretion through vesicles
  • [FREE] Describe the function of each organelle. - Nucleus - Ribosome . . .
    The nucleus is an organelle found in eukaryotic cells that houses the cell's genetic material, DNA This organelle controls cellular activities by regulating gene expression and is where RNA is transcribed
  • [FREE] Cellular respiration takes place in which organelle? A. Nucleus . . .
    Cellular respiration takes place in the mitochondria, which are organelles responsible for producing ATP They convert glucose and oxygen into energy that cells can use Mitochondria are often referred to as the powerhouses of the cell due to their crucial role in energy production
  • Consider a uranium nucleus to be a sphere of radius
    Consider a uranium nucleus to be a sphere of radius R = 7 4 × 10−15 m with a charge of 92e distributed uniformly throughout its volume (a) What is the electric force (in N) exerted on an electron when it is 3 3 × 10−15 m from the center of the nucleus? (b) What is the acceleration of the electron at this point (in m s2)?





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