Elements

Elements consist of only one kind of atom and cannot be decomposed into simpler substances.
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P elements are typical transposable elements , containing terminal inverted repeats and creating target site duplications on transposition. Autonomous P elements encode a protein which is probably the transposase.
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Elements are substances made up of only one kind of atom.
There are 92 naturally occurring elements. Matter is therefore composed of 92 different kinds of elements.
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Elements have particular sets of lines at particular wavelengths, corresponding to the energy levels of their atomic orbitals.
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Elements which are members of group VIIIA as used in this course. The noble gasses are He, Ne, Ar, Kr, Xe and Rn.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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elements: the fundamental building blocks of matter within all living things.
embryo: forms when all the organs of the body have taken shape.
embryology: the study of embryonic development.
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Elements always have an oxidation number of zero. In the first half reaction hydrogen is oxidized from an oxidation number of zero to an oxidation number of +1.
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DNA elements carrying genes for transposition and other genetic functions. The former genes enable those elements to move from one site on a chromosome to another. In many cases the latter genes enable bacteria to live in extreme environments.
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macroelements Essential elements needed for plant growth in relatively large amounts; C, H, O, P, K, N, S, Ca, Fe, Mg.
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sieve elements Tubular, thin-walled cells that form a system of tubes extending from the roots to the leaves in the phloem of plants; lose their nuclei and organelles at maturity, but retain a functional plasma membrane. PICTURE 1 PICTURE 2 ...
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Note: Elements in their natural state (H2, O2, N2, C, etc.) are used as the basis for heat of formation tables and are assigned a value of zero. See table 12-2.
Qmv = 142.08 + 0.572(10) = 147.8 kcal/mol ...
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Repeat elements, or junk DNA, in the human genome come in four varieties: the "extinct" type (DNA transposons), the near-extinct type (the LTR retroposons), ...
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Emery's Elements of Medical Genetics: Glossary
Genetic Epidemiology Glossary
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Response elements are binding sites for transcription factors. Sequences of response elements are required for the functions of the transcription factors.
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Transposible elements: Genetic elements characterized by their abilities to insert into and withdraw from a given location within the genome, resulting in movement from site to site within the genome over a period of time.
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Intein
Selfish DNA elements located within coding regions that are translated with the interrupted protein, but then catalyze their own excision and the formation of a peptide bond between the flanking protein regions.
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pleo- more than usual polar Molecules which contain elements differing in electronegativity, making them soluble in water. polarity Depending on the context meaning one of two things.
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Artificial chromosome A vector constructed from host cell chromosomal elements such as origin of replication, telomeres and centromere (in eukaryotes).
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This chapter reviews recent advances in the identification of the structural elements of the permeability transition pore. The discovery that cyclosporin A (CsA) inhibits the pore proved instrumental.
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One interesting case of this involves genetic elements called P elements. Margaret Kidwell found that P elements were transferred from some species in the Drosophila willistoni group to Drosophila melanogaster.
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Most of these repeat sequences are transposable elements, that can replicate and insert a copy in a new location in the genome. The result is the amplification of these repetitive elements over time.
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Repetitive DNA: A surprising portion of any genome consists not of genes or structural elements, but of frequently repeated simple sequences. These may be short repeats just a few nt long, like CACACA etc.
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These are likely derived from retroviruses; other retroransposons lack viral genes. Retrotransposons are ubiquitous elements in eukaryotic genomes.
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The dissolving of minerals and other elements in soil or rocks by the downward movement of water.
leading strand
The new continuous complementary DNA strand synthesized along the template strand in the mandatory 5' to 3' direction.
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capable of self-nourishment by using chemical elements for food, for example green plants; contrast to heterotrophic
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby
What Topic Is Your BIOLOGY Paper On?
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TRANSPOSON - A transposable genetic element; certain sequence elements which are capable of moving from one site to another in a DNA molecule without any requirement for sequence relatedness at the donor and acceptor sites.
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eye-piece
or ocular, one of the magnifying elements of a microscope.
eyespots
a light-sensitive organelle present in unicellular organisms, green algae, zoospores, and some gametes.
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ecosystem -- All the organisms in a particular region and the environment in which they live. The elements of an ecosystem interact with each other in some way, and so depend on each other either directly or indirectly.
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