What is DNA polymerase II? Definition of DNA polymerase II DNA polymerase II (DNA Pol II) is a prokaryotic DNA-dependent DNA polymerase that primarily functions as a backup enzyme in DNA replication and repair processes. It belongs to the B family of DNA polymerases and possesses DNA synthesis and proofreading activities. Structure of DNA polymerase … Read more
What is DNA polymerase I? Definition of DNA polymerase I DNA polymerase I (Pol I) is an enzyme found in prokaryotes that plays a role in DNA replication and repair, primarily assisting in the removal of RNA primers and filling in the resulting gaps with DNA nucleotides. Structure of DNA polymerase I Mechanism of DNA … Read more
What is 3 Domains of Life? The intricate tapestry of life, as we understand it today, is a culmination of extensive scientific research and discoveries. Historically, the living world was bifurcated into two primary domains: Eukaryotes (Eukarya) and Prokaryotes (Bacteria). This classification was rooted in microscopic observations, particularly the presence or absence of membrane-bound nuclei … Read more
What is Domain? Definition of Domain In biology, a domain is the highest taxonomic rank used to categorize and group organisms based on shared characteristics and evolutionary history. Domain in the Tree of Life Development of the Domain System The conception and evolution of the domain system, a fundamental framework for the classification of life, … Read more
What is Embryology? Definition of Embryology Embryology is the scientific study of the formation, development, and growth of embryos and fetuses within organisms. History of Embryology The historical trajectory of embryology is a testament to humanity’s enduring quest to understand the origins and development of life. This journey, spanning diverse civilizations, offers a rich tapestry … Read more
What is Embryonic Stem Cell? Definition of Embryonic Stem Cell Embryonic stem cells (ESCs) are pluripotent cells derived from the inner cell mass of a blastocyst, an early-stage embryo, capable of differentiating into any cell type within an organism. History of Embryonic Stem Cell The history of embryonic stem cells (ESCs) is marked by pioneering … Read more
What is Endosymbiosis? Definition of Endosymbiosis Endosymbiosis is a form of symbiosis in which one organism (the endosymbiont) lives inside the cells or body of another organism (the host), often resulting in mutual benefits for both entities. Endosymbiotic Theory The Endosymbiotic Theory offers a comprehensive explanation for the evolutionary transition from prokaryotic to eukaryotic cells. … Read more
What is Endosymbiotic Theory? Definition of Endosymbiotic Theory The Endosymbiotic Theory posits that certain organelles in eukaryotic cells, specifically mitochondria and chloroplasts, originated from free-living prokaryotic cells that were engulfed by ancestral eukaryotic cells, leading to a mutually beneficial symbiotic relationship. Origin of the eukaryotic cell 1. Gene Trees and the Complexity of Eukaryotic Origins … Read more
What is Eukaryotic Cell? Definition of Eukaryotic Cell A eukaryotic cell is a type of cell characterized by a membrane-bound nucleus and the presence of various organelles within its cytoplasm, distinguishing it from prokaryotic cells which lack a true nucleus. Eukaryotic cells are found in organisms such as plants, animals, fungi, and many unicellular entities. … Read more
What is Experimental Group? Definition of Experimental Group The experimental group, in scientific research, refers to the group subjected to specific changes or treatments in a variable to observe and evaluate potential outcomes, in contrast to a control group which remains unaltered or standardized for comparison. How Does an Experimental Group Work? In the context … Read more
What is Feedback Inhibition? Definition of Feedback Inhibition Feedback inhibition is a cellular regulatory mechanism in which the end product of a biochemical pathway inhibits the activity of the first enzyme in that pathway, preventing overproduction of the end product. Enzymes, Substrates, and Products Process of Feedback Inhibition Feedback inhibition, a cardinal regulatory mechanism within … Read more
What is Food Vacuole? Definition of Food Vacuole A food vacuole is a membrane-bound organelle found in certain cells, especially protozoan microorganisms, that encloses and digests ingested nutrients using digestive enzymes, subsequently releasing the digested molecules into the cytoplasm for cellular utilization. Structure Of Food Vacuole The food vacuole, a specialized cellular compartment, is characterized … Read more
Domain: Bacteria Phylum: Actinomycetota Class: Actinomycetia Order: Bifidobacteriales Family: Bifidobacteriaceae Genus: Gardnerella Species: G. vaginalis What is Gardnerella Vaginalis? Gardnerella vaginalis is a micro-aerophilic coccobacillus that is a constituent of the vaginal microbiota. This bacterium, while present in the vaginal flora, does not inherently lead to bacterial vaginosis unless its populations become predominant. Contrary to some … Read more
What is Genetic Engineering? Definition of Genetic Engineering Genetic engineering is the deliberate manipulation of an organism’s DNA using advanced techniques to modify, add, or remove specific genes, resulting in desired genetic traits or functions. Basic Tools of Genetic Engineering Genetic engineering involves the manipulation and transfer of genes from one organism to another. To … Read more
What is Genus? Definition of Genus A genus is a taxonomic rank in biological classification that groups together species with shared characteristics or evolutionary lineage, positioned above species and below family. Classification System The Naming System In the realm of biological taxonomy, the system of binomial nomenclature stands as a cornerstone for naming organisms. This … Read more
What is Gibberellin? Definition of Gibberellin Gibberellin is a class of diterpenoid plant hormones that regulate various developmental processes, including stem elongation, germination, flowering, and dormancy. Structure of Gibberellin Biosynthesis of Gibberellin Gibberellins, a class of plant hormones, play a pivotal role in various growth and developmental processes. The intricate pathway leading to the synthesis … Read more
What is Glycogen? Definition of Glycogen Glycogen is a branched polysaccharide composed of glucose units and serves as the primary form of energy storage in animals and humans. Characteristics of Glycogen Glycogen, often termed “animal starch,” is a pivotal energy reserve in animals, with its counterpart in plants being starch. This complex carbohydrate is responsible … Read more
What is Glycoprotein? Definition of Glycoprotein A glycoprotein is a complex molecule composed of a protein covalently bonded to one or more carbohydrate chains, playing diverse roles in biological processes and cell-to-cell interactions. Glycoprotein Structure Methods used to study glycoproteins Glycoproteins, with their intricate structures and multifaceted roles in biological systems, necessitate advanced methodologies for … Read more
What is Haploid? Definition of Haploid A haploid is a cell or organism that contains a single set of chromosomes, which is half the number present in diploid cells. Typically, gametes, such as sperm and egg cells, are haploid. Haploid number Differences between Haploid and Diploid cells In the intricate realm of cellular biology, cells … Read more
What Are HeLa Cells? Definition of HeLa Cells HeLa cells are an immortal human cell line derived from the cervical cancer tissue of a patient named Henrietta Lacks. First cultured in 1951, these cells have the unique ability to divide and proliferate indefinitely in vitro, making them invaluable for scientific and medical research. Their widespread … Read more
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