Genomes, as physical systems, comprise the complete set of nucleic acid molecules (typically DNA, or RNA in some viruses) that encode the hereditary information of an organism, including all chromosomes and extrachromosomal genetic elements. They are organized into linear or circular polymers of nucleotides, with specific higher-order structures such as chromatin in eukaryotes or nucleoid organization in prokaryotes. At the physical level, genomes exhibit defined sequence composition, length, and structural features (e.g., replication origins, regulatory regions, repetitive elements) that collectively determine their stability, replication dynamics, mutational patterns, and interactions with cellular molecular machinery.
Every cell in the body has the same DNA, but different cell types—such as muscle or brain cells—use different parts of it. Transcription factors help cells activate specific genes by reading certain DNA sequences, but since ...
Cell & Microbiology
Nov 4, 2025
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Could yeast and humans be any more different? Going by looks alone, probably not. But peering into our genomes reveals surprising similarities. That's because we share a common ancestor called LECA (last eukaryotic common ...
Cell & Microbiology
Oct 28, 2025
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DNA, often called the blueprint of life, is built from four chemical building blocks known as deoxy-nucleoside triphosphates (dNTPs)—dATP, dTTP, dGTP, and dCTP. Cells constantly need these molecules to duplicate their DNA ...
Cell & Microbiology
Oct 27, 2025
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Some genetic disorders—such as cystic fibrosis, hemophilia and Tay Sachs disease—involve many mutations in a person's genome, often with enough variation that even two individuals who share the same disorder might have a ...
Biotechnology
Oct 23, 2025
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Long interspersed nuclear element-1 (LINE-1 or L1) is the only active, self-copying genetic element in the human genome—comprising about 17% of the genome. It is commonly called a "jumping gene" or "retrotransposon" because ...
Molecular & Computational biology
Oct 20, 2025
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An international team led by Monash University researchers has uncovered the genetic code governing the way genetic mutations affect mRNA and result in disease.
Molecular & Computational biology
Oct 20, 2025
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Before cells can divide, they first need to replicate all of their chromosomes, so that each of the daughter cells can receive a full set of genetic material. Until now, scientists had believed that as division occurs, the ...
Cell & Microbiology
Oct 17, 2025
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Technological development is key to improving the way hematologic cancer is diagnosed and treated. With this vision, the Josep Carreras Leukemia Research Institute is committed to the creation and implementation of new systems ...
Biotechnology
Oct 16, 2025
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Depending on the setting, the ability of a crucial bacterium in biotechnology—Agrobacterium tumefaciens—to transfer its DNA to a host plant can make it either a pathogen that damages crops or a powerful method for genetically ...
Biotechnology
Oct 14, 2025
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People often compare the genome to a computer's program, with the cell using its genetic code to process environmental inputs and produce appropriate responses.
Cell & Microbiology
Oct 11, 2025
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