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Hace 3 días · Cell theory states that the cell is the fundamental structural and functional unit of living matter. In 1839 German physiologist Theodor Schwann and German botanist Matthias Schleiden promulgated that cells are the “elementary particles of organisms” in both plants and animals and recognized that some organisms are unicellular ...
- Cell Division and Growth
Cell - Mitosis, Cytokinesis, Prokaryotes: In unicellular...
- Transport Across The Membrane
Cell - Membrane Transport, Osmosis, Diffusion: The chemical...
- General Functions and Characteristics
Cell - Structure, Organelles, Metabolism: Like the cell...
- Regulation of Rna After Synthesis
Regulation of RNA after synthesis. After synthesis, RNA...
- Actin Filaments
Cell - Actin Filaments, Cytoskeleton, Proteins: Actin is a...
- The Nuclear Envelope
Cell - Nuclear Envelope, Membrane, Organelles: The nuclear...
- Membrane Lipids
Cell - Lipids, Phospholipids, Membranes: Membrane lipids are...
- Molecules, Structure, Biology
Cell - Molecules, Structure, Biology: Cells are largely...
- Cell Division and Growth
Hace 1 día · Let's start with the critically important Cell Theory, first articulated in the 1800s. The three main principles are:1. All living things are composed of cel...
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Hace 1 día · Eukaryotic cells have a variety of internal membrane-bound structures, called organelles, and a cytoskeleton which defines the cell's organization and shape. The nucleus stores the cell's DNA , which is divided into linear bundles called chromosomes ; [20] these are separated into two matching sets by a microtubular spindle during nuclear division, in the distinctively eukaryotic process of ...
Hace 5 días · … Central dogma. The central dogma of molecular biology is a theory stating that genetic information flows only in one direction, from DNA, to RNA, to protein, or RNA directly to protein. Narration. 00:00. … Central Dogma. The fundamental theory of central dogma was developed by Francis Crick in 1958.
Hace 2 días · Before typical cell division, these chromosomes are duplicated in the process of DNA replication, providing a complete set of chromosomes for each daughter cell. Eukaryotic organisms ( animals , plants , fungi and protists ) store most of their DNA inside the cell nucleus as nuclear DNA , and some in the mitochondria as mitochondrial DNA or in chloroplasts as chloroplast DNA . [5]
Hace 3 días · One theory of aging assumes that the life span of a cell or organism is genetically determined—that the genes of an animal contain a “program” that determines its life span, just as eye colour is determined genetically. This theory finds support in the fact that people with parents who have lived long lives are likely to live ...
Hace 5 días · A nucleus, as related to genomics, is the membrane-enclosed organelle within a cell that contains the chromosomes. An array of holes, or pores, in the nuclear membrane allows for the selective passage of certain molecules (such as proteins and nucleic acids) into and out of the nucleus. Human Cell 3-D. From a US national research authority.
