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Structure in Biological Definition

Amino acid

... 1 Overview 2 General structure of an amino acid 2.1 Isomerism 3 ... histidine and arginine . General structure of an amino acid The general structure of proteinogenic alpha amino acids is: ...

Anatomy

... is the branch of biology that deals with the structure and organization of living things; thus there is ... . Animal anatomy may include the study of the structure of different animals, when it is called ... causes which have brought about the existing structure of humans, and needing a knowledge of the allied ...

Animal

... Contents showTocToggle("show","hide") 1 structure 2 Groups of animals 2.1 Deuterostomes ... 5 See also 6 External links structure With a few exceptions, most notably the ... groups of bilaterians with relatively similar structure that appear to have diverged before these major ...

Antibody

... 1 Definition 2 structure of the antibody 3 Isotypes 3.1 IgG ... with a T helper cell is also necessary. structure of the antibody Immunoglobulins are heavy ... can only produce antibodies against the structure it presents on its surface. Antibodies exist ...

Beta sheet

... a commonly occurring form of regular secondary structure in proteins , first proposed by Linus Pauling ... the amino acid residues found in a β sheet structure may also be arranged such that many of the ... or more prolines . See also : tertiary structure -- α helix -- collagen helix ...

Biology

... 2 Scope of biology 2.1 structure of life 2.2 Physiology of organisms 2.3 ... in describing the function of organ systems. structure of life Schematic of typical animal ... , where it is represented in the chemical structure of particular DNA molecules . Genes ...

Bacterium

... mostly unicellular, with a relatively simple cell structure lacking a cell nucleus , cytoskeleton, and ... as mitochondria and chloroplasts . Their cell structure is further described in the article about ... around using flagella , which are different in structure from the flagella of other groups. ...

Bioinformatics

... the field include sequence alignment , protein structure alignment , protein structure prediction , prediction of gene expression and ... 2.2 Protein expression analysis 2.3 structure prediction 2.4 Modeling biological systems ...

Bone

... 1 General overview 2 Forms and structure of bone 3 Cells of bone 4 Bone matrix ... may vary at different points . Forms and structure of bone Bone can be either compact or ... growth continues. Long bones are tubular in structure (e.g. the tibia ). The central shaft of a long ...

Brain

... cortices with less than six layers of neurons, a structure known as allocortex (Martin, 1996). More ... neural networks that are loosely based on the structure of neuron connections in the brain. Artificial ... below) the cerebrum is the cerebellum, a complex structure that helps in the control of movement. The ...

Carbohydrate

... Contents showTocToggle("show","hide") 1 structure 2 Monosaccharides 3 Disaccharides ... 7 See also 8 External links structure Glucose as a straight-chain ... ( Haworth projection ) The straight-chain structure described here is only one of the forms a ...

Chromatin

... chromatin packaged genes. Changes in chromatin structure are effected mainly by methylation and acylation of the nucleosome proteins. Chromatin structure is also of importance with respect to the DNA ... chromatin packaged genes. Changes in chromatin structure are effected mainly by methylation and acylation ...

Collagen

... the stabilisation of the tropocollagen globular structure as well as the final fibre shaped structure by forming covalent bonds. The resulting structure is called a collagen helix . Types of ...

Bioinformatics

... the field include sequence alignment , protein structure alignment , protein structure prediction , prediction of gene expression and ... 2.2 Protein expression analysis 2.3 structure prediction 2.4 Modeling biological systems ...

DNA

... 2 DNA in crime 3 Overview of molecular structure 4 The role of the sequence 5 DNA ... traits and chromosomes 9.3 Discovery of the structure of DNA 9.3.1 Discovery that DNA is ... possible suspects. Overview of molecular structure Although sometimes called "the molecule of ...

Ebola

... 1 The Ebola virus 1.1 structure 1.2 Ebola virus history 1.2.1 ... between outbreaks has not been identified. structure Electron micrographs of the Ebola virus show it to have the characteristic filamentous structure of a filovirus . The viral filaments can appear ...

Endoplasmic reticulum

... organelles and thus do not have an ER. ER's base structure and composition is similar to the plasma ... Contents showTocToggle("show","hide") 1 structure 1.1 Rough ER 1.2 Smooth ER 2 ... of proteins 2.2 Other functions structure Figure 1 : Image of nucleus , ...

Enzyme

... 1 Etymology and history 2 structure and function 2.1 Rate of enzyme mediated ... cells. He called these molecules enzymes. structure and function In enzymes, as with other ... the active regions correctly. Because the precise structure of each region tends to be fairly critical to ...

Bacterium

... mostly unicellular, with a relatively simple cell structure lacking a cell nucleus , cytoskeleton, and ... as mitochondria and chloroplasts . Their cell structure is further described in the article about ... around using flagella , which are different in structure from the flagella of other groups. ...

Evolution

... , genetic drift or changes in population structure ( gene flow ). Contents ... homologous structures . A vestigial organ or structure may exist with little or no purpose in one ... branch of biology that provides the mathematical structure for the study of the process of microevolution. ...

Francis Crick

... 28 , 2004 ) was one of the discoverers of the structure of the DNA molecule. Born in Northampton , ... together developed the proposal of the helical structure of DNA, which they published in 1953 , and for ... Helix: A Personal Account of the Discovery of the structure of DNA , Atheneum, 1980, ISBN 0689706022 (first ...

Cell membrane

... 1 A Fluid Mosaic 2 Detailed structure 3 Transport across membranes 3.1 ... A Fluid Mosaic The basic composition and structure of the plasma membrane is the same as that of the ... assist in regulating fluidity. Detailed structure In fact, not all lipid molecules in the cell ...

Fungus

... 1 Human consumption 2 structure 3 Reproduction 3.1 Sexual 3.2 ... as breads, alcohol, and certain cheeses. structure Fungi can be divided into two basic ... known as opisthokonts ; similarities include the structure of flagella, when present, and the formation of ...

Gene

... and function of genes 2.1 Chemical structure of a gene 2.2 Expression of molecular genes ... biology , the DNA of a gene encodes the chemical structure of a protein . The genetic code determines the ... range from mechanical support of the cell structure to the transportation and manufacture of other ...

Genetic recombination

... from the same genes thereby preserving the structure of genes. One mechanism leading to recombination ... sites within one DNA molecule. If the structure of genes is changed in that process it is called ... to the remaining strand in the first, forming a structure known as a cross-strand exchange or a Holliday ...

Genetics

... , where it is represented in the chemical structure of particular DNA molecules . Genes encode ... (and all other organisms) to be DNA 1953 DNA structure is resolved to be a double helix by James D. ... of classical genetics but focuses on the structure and function of genes at a molecular level. ...

Glucose

... A Haworth projection representation of the structure of glucose (α-D-glucopyranose) Glucose ... the ring, forming a CH 2 OH group. This ring structure exists in equilibrium with a more reactive ... comes from the Latin root for "left." The ring structure itself may form in two additionally different ...

Histone

... 1 Classes 2 Functions 3 structure 4 History 5 See also Classes ... Regulation occurs at the TATA box . structure Histones are rich in lysine and arginine ... during interphase . It also appears that the structure of histones have been evolutionarily conserved, ...

Insulin

... C 254 H 377 N 65 O 75 S 6 . Insulin structure varies slightly between species . Its ... 1 Discovery and characterization 2 structure and production 3 Actions on cellular and ... , a medical student in Berlin , was studying the structure of the pancreas under a new microscope when he ...

Ion channel

... 2.1 Diversity and activation 3 Detailed structure 4 History 5 See also 6 External ... overcome an absence of the other. Detailed structure Channels differ with respect to the ion they ... helices. The determination of their molecular structure by Roderick MacKinnon using X-ray ...

James D. Watson

... 6 , 1928 ) is one of the discoverers of the structure of the DNA molecule. Born in Chicago , he ... , they together deduced the double helix structure of DNA, which they published in the journal ... H. Crick. "Letters to Nature : Molecular structure of Nucleic Acid." Nature 171 , 737738 (1953). ...

Leaf

... showTocToggle("show","hide") 1 Leaf structure 1.1 Epidermis 1.2 Mesophyll 1.3 ... 10 See Also 11 External link Leaf structure A structurally complete leaf of an angiosperm ... (flattened). The tremendous variety shown in leaf structure (anatomy) from species to species is presented in ...

Lipase

... from the guinea pig, it is a 3-D model from structure coordinates submitted to the Protein Data Bank ... lipase with a phospholipase A1 activity: crystal structure of a chimeric pancreatic lipase-related protein 2 from guinea pig. structure 4:1363-74. REFERENCES: Afonso, ....

Lipid

... Figure 1: structure of a Lipid. Many lipids consists of a polar head ... largely nonpolar. Generally, the bulk of their structure is nonpolar or hydrophobic ("water-fearing"), ... polar solvents like water. Another part of their structure is polar or hydrophilic ("water-loving") and ...

Animal

... Contents showTocToggle("show","hide") 1 structure 2 Groups of animals 2.1 Deuterostomes ... 5 See also 6 External links structure With a few exceptions, most notably the ... groups of bilaterians with relatively similar structure that appear to have diverged before these major ...

Mitosis

... of chromatin condenses into a highly ordered structure called a chromosome . Since the genetic ... at the centromeres. This is a complex protein structure that may be thought of as an 'eyelet' for the ... secured. The kinetochore is an enormously complex structure that is not yet fully understood. The key feature ...

Molecular biology

... . As of the early 2000s , the study of gene structure and function, molecular genetics , has been ... the protein may be crystallized so its tertiary structure can be studied, or, in the pharmaceutical ... , translation from RNA into protein ) Protein structure and diversity Notable molecular biologists ...

Neuron

... action potentials 6 Histology and internal structure 7 Neurons of the brain 8 See also ... the diameter of the soma in length. This is the structure which carries nerve signals away from the neuron. ... among neurons. Histology and internal structure Nerve cell bodies stained with basophilic dyes ...

Nucleosome

... as bead-like structures along the DNA. structure The histones make up the central core ... can be arranged in a 30-nm-fiber , a compacted structure (once thought to be a helical solenoid, but now considered likely to exist as a zig-zag structure in vivo) with a packing ratio of ~40. The H1 ...

Cell membrane

... 1 A Fluid Mosaic 2 Detailed structure 3 Transport across membranes 3.1 ... A Fluid Mosaic The basic composition and structure of the plasma membrane is the same as that of the ... assist in regulating fluidity. Detailed structure In fact, not all lipid molecules in the cell ...
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