Modern biology textbooks assert that only bacteria can take nitrogen from the atmosphere and convert it into a form that is usable for life. Plants that fix nitrogen, such as legumes, do so by harboring symbiotic bacteria ...
Cell & Microbiology
Apr 11, 2024
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(PhysOrg.com) -- An international group of scientists has analyzed the DNA of primitive microscopic algae, and their findings suggest that all plants on Earth may have had a single ancestor.
Just as healthy organs are vital to our well-being, healthy organelles are vital to the proper functioning of the cell. These subcellular structures carry out specific jobs within the cell; for example, mitochondria power ...
Cell & Microbiology
Jan 1, 2024
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121
Electricity is a key ingredient in living bodies. We know that voltage differences are important in biological systems; they drive the beating of the heart and allow neurons to communicate with one another. But for decades, ...
Bio & Medicine
Dec 24, 2020
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Cells contain various specialized structures—such as the nucleus, mitochondria or peroxisomes—known as "organelles." Tracing their genesis and determining their structure is fundamental to understanding cell function ...
Cell & Microbiology
Apr 10, 2024
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124
Scientists at the Department of Genetics, Blavatnik Institute at Harvard Medical School have discovered something remarkable while studying phosphate transport in fruit fly intestines—a never before seen organelle. Their ...
Scientists at the University of Virginia School of Medicine have discovered a strange new organelle inside our cells that helps to prevent cancer by ensuring that genetic material is sorted correctly as cells divide.
Cell & Microbiology
Oct 22, 2019
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226
Scientists call it LUCA, the Last Universal Common Ancestor, but they don't know much about this great-grandparent of all living things. Many believe LUCA was little more than a crude assemblage of molecular parts, a chemical ...
Cell & Microbiology
Oct 5, 2011
11
0
Eukaryotic cells—the ones that make up most life as we know it, including all animals, plants and fungi—are highly structured objects.
General Physics
Jan 6, 2023
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744
Scientists have made a breakthrough in understanding how different compartments (or organelles) of human cells interact.
Cell & Microbiology
Jan 20, 2017
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424
In cell biology, an organelle ( /ɔrɡəˈnɛl/) is a specialized subunit within a cell that has a specific function, and is usually separately enclosed within its own lipid bilayer.
The name organelle comes from the idea that these structures are to cells what an organ is to the body (hence the name organelle, the suffix -elle being a diminutive). Organelles are identified by microscopy, and can also be purified by cell fractionation. There are many types of organelles, particularly in eukaryotic cells. Prokaryotes were once thought not to have organelles, but some examples have now been identified.
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