Examples of organelle in the following topics:
-
- numerous membrane-bound organelles (including the endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria)
- Typically, the nucleus is the most prominent organelle in a cell.
- Mitochondria are oval-shaped, double membrane organelles that have their own ribosomes and DNA.
- All of these organelles are found in each and every eukaryotic cell.
- Chloroplasts are the organelles that carry out photosynthesis.
-
- Mitochondria are organelles that are responsible for making adenosine triphosphate (ATP), the cell's main energy-carrying molecule.
- Mitochondria are double-membraned organelles that contain their own ribosomes and DNA.
- Each mitochondrion measures 1 to 10 micrometers (or greater) in length and exists in the cell as an organelle that can be ovoid to worm-shaped to intricately branched.
- Such functions are often associated with the reduced mitochondrion-derived organelles of anaerobic eukaryotes.
- This organelle has an outer membrane and an inner membrane.
-
- The endoplasmic reticulum is an organelle that is responsible for the synthesis of lipids and the modification of proteins.
- These modified proteins will be incorporated into cellular membranes—the membrane of the ER or those of other organelles—or secreted from the cell (such as protein hormones, enzymes).
- This transmission electron micrograph shows the rough endoplasmic reticulum and other organelles in a pancreatic cell.
-
- The biological levels of organization range from a single organelle all the way up to the biosphere in a highly structured hierarchy.
- Macromolecules can form aggregates within a cell that are surrounded by membranes; these are called organelles.
- Organelles are small structures that exist within cells.
- Taken together, all of these levels comprise the biological levels of organization, which range from organelles to the biosphere .
- From a single organelle to the entire biosphere, living organisms are parts of a highly structured hierarchy.
-
- Lysosomes are organelles that digest macromolecules, repair cell membranes, and respond to foreign substances entering the cell.
- If no food is provided, the lysosome's enzymes digest other organelles within the cell in order to obtain the necessary nutrients.
- In addition to their role as the digestive component and organelle-recycling facility of animal cells, lysosomes are considered to be parts of the endomembrane system.
- Other organelles are present in the cell but for simplicity are not shown.
-
- A type of organelle found in both animal cells and plant cells, a peroxisome is a membrane-bound cellular organelle that contains mostly enzymes .
- Peroxisomes are membrane-bound organelles that contain an abundance of enzymes for detoxifying harmful substances and lipid metabolism.
-
- Vesicles can also fuse with other organelles within the cell.
- Animal cells have a set of organelles not found in plant cells: lysosomes.
- Enzymes within the lysosomes aid the breakdown of proteins, polysaccharides, lipids, nucleic acids, and worn-out organelles.
- Many reactions that take place in the cytoplasm could not occur at a low pH, so again, the advantage of compartmentalizing the eukaryotic cell into organelles is apparent.
-
- Animal cells have another set of organelles not found in plant cells: lysosomes.
- Enzymes within the lysosomes aid the breakdown of proteins, polysaccharides, lipids, nucleic acids, and even worn-out organelles.
- Many reactions that take place in the cytoplasm could not occur at a low pH, so the advantage of compartmentalizing the eukaryotic cell into organelles is apparent.
- Chloroplasts are plant cell organelles that carry out photosynthesis.
- Some bacteria perform photosynthesis, but their chlorophyll is not relegated to an organelle.
-
- Bacteria do not tend to have membrane-bound organelles in their cytoplasm and thus contain few large intracellular structures.
- They consequently lack a true nucleus, mitochondria, chloroplasts, and the other organelles present in eukaryotic cells, such as the Golgi apparatus and endoplasmic reticulum.
-
- 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.
- The possibility that the peroxisome organelles may have an endosymbiotic origin has also been considered, although they lack DNA.
- A eukaryote with mitochondria engulfed a cyanobacterium in an event of serial primary endosymbiosis, creating a lineage of cells with both organelles.