chloroplast

(noun)

an organelle found in the cells of green plants and photosynthetic algae where photosynthesis takes place

Related Terms

  • stoma
  • plastid
  • thylakoid
  • mesophyll

Examples of chloroplast in the following topics:

  • Chloroplast

  • Main Structures and Summary of Photosynthesis

    • In all autotrophic eukaryotes, photosynthesis takes place inside an organelle called a chloroplast.
    • For plants, chloroplast-containing cells exist in the mesophyll.
    • Chloroplasts have a double membrane envelope composed of an outer membrane and an inner membrane.
    • Photosynthesis takes place in chloroplasts, which have an outer membrane and an inner membrane.
    • The palisade layer contains most of the chloroplast and principal region in which photosynthesis is carried out.
  • Comparing Plant and Animal Cells

    • Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, whereas animal cells do not.
    • Like mitochondria, chloroplasts have their own DNA and ribosomes, but chloroplasts have an entirely different function.
    • Chloroplasts are plant cell organelles that carry out photosynthesis.
    • Like mitochondria, chloroplasts have outer and inner membranes, but within the space enclosed by a chloroplast's inner membrane is a set of interconnected and stacked fluid-filled membrane sacs called thylakoids .
    • Like plant cells, photosynthetic protists also have chloroplasts.
  • The Evolution of Plastids

    • There are three type of plastids: chloroplasts, chromoplasts, and leucoplasts.
    • Chloroplasts are plastids that conduct photosynthesis.
    • Each chloroplast is surrounded by two membranes, suggestive of primary endosymbiosis.
    • (a) This chloroplast cross-section illustrates its elaborate inner membrane organization.
    • (b) The chloroplasts can be seen as small green spheres.
  • Activation of Starvation by Survival Genes

    • Stringent response is a stress response that occurs in bacteria and plant chloroplasts in reaction to stress conditions.
    • Stringent Response, also called stringent control, is a stress response that occurs in bacteria and plant chloroplasts in reaction to amino-acid starvation, fatty acid limitation, iron limitation, heat shock, and other stress conditions.
  • Endosymbiosis and the Evolution of Eukaryotes

    • Mereschkowski was familiar with work by botanist Andreas Schimper, who had observed in 1883 that the division of chloroplasts in green plants closely resembled that of free-living cyanobacteria.
    • More detailed electron microscopic comparisons between cyanobacteria and chloroplasts combined with the discovery that plastids (organelles associated with photosynthesis) and mitochondria contain their own DNA led to a resurrection of the idea in the 1960s.
    • These cyanobacteria have become chloroplasts in modern plant cells.
  • Microbes and the Origin of Life on Earth

    • There is compelling evidence that mitochondria and chloroplasts were once primitive bacterial cells.
    • Over millions of years of evolution, mitochondria and chloroplasts have become more specialized and today they cannot live outside the cell.
    • Mitochondria and chloroplasts have striking similarities to bacteria cells.
    • A double membrane surrounding both mitochondria and chloroplasts is further evidence that each was ingested by a primitive host.
  • Characteristics of Eukaryotic Cells

    • numerous membrane-bound organelles (including the endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria)
    • In addition, plant cells have a cell wall, a large central vacuole, chloroplasts, and other specialized plastids, whereas animal cells do not.
    • Chloroplasts are the organelles that carry out photosynthesis.
    • Plant cells have a cell wall, chloroplasts, plasmodesmata, and plastids used for storage, and a large central vacuole, whereas animal cells do not.
  • The Two Parts of Photosynthesis

    • The light-dependent reactions take place in the thylakoid membranes in the granum (stack of thylakoids), within the chloroplast.
    • In photosystem I, the electron comes from the chloroplast electron transport chain.
  • Ocean Floor

    • One example of these fundamental symbioses are chloroplasts, which allow eukaryotes to conduct photosynthesis.
    • Chloroplasts are considered to be endosymbiotic cyanobacteria, a group of bacteria that are thought to be the origins of aerobic photosynthesis.
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