Cell Biology day 12

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  1. Nucleoid
    A dense region of DNA in a prokaryotic cell.
  2. Nucleolus
    (plural, nucleoli) A specialized structure in the nucleus, formed from various chromosomes and active in the synthesis of ribosomes.
  3. Nucleosome
    The basic, beadlike unit of DNA packaging in eukaryotes, consisting of a segment of DNA wound around a protein core composed of two copies of each of four types of histone.
  4. Nucleus
    • (1) An atom's central core, containing protons and neutrons.
    • (2) The chromosome-containing organelle of a eukaryotic cell.
  5. nuclear lamina
    The nuclear Lamina lines the the nuclear envelope it is made of a lattice/net of protein filaments which provide support for the nucleus and anchorage points for chromosomes.
  6. Nuclear envelope
    The membrane in eukaryotes that encloses the nucleus, separating it from the cytoplasm.
  7. nuclear pore complex
    The nucleus has a double membrane (nuclear envelope) surrounding it. This is continuous with the endoplasmic reticulum and is studded with nuclear pores, each of which has a distinctive ring of proteins surrounding the pore.
  8. Organelle
    One of several formed bodies with specialized functions, suspended in the cytoplasm of eukaryotic cells.
  9. Peroxisome
    A microbody containing enzymes that transfer hydrogen from various substrates to oxygen, producing and then degrading hydrogen peroxide.
  10. plasma membrane
    It lines the inside of the cell wall.
Card Set
Cell Biology day 12
day 12 of cell biology glossary
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