Elements
Elements consist of only one kind of atom and cannot be decomposed into simpler substances.
Long interspersed elements
long repetitive sequences in dna with terminal repeats seen in human and mouse dna.
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Elements of the Cytoskeleton
All of the microfilaments and microtubules combine to form the cytoskeleton of the cell. The cytoskeleton is different from cytoplasm (cytosol). The cytoskeleton provides structure. Cytoplasm is just a fluid.
Elements
Elements cannot be broken down into substances with different properties by chemical reactions. For example, water (H2O) is not an element because it can be broken down into hydrogen (H) and oxygen (O).
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 ...
vessel elements Short, wide cells arranged end to end, forming a system of tubes in the xylem that moves water and solutes from the roots to the rest of the plant.
Mobile Elements and DNA Integration
Jerzy Jurka
Genetic Information Research Institute, Palo Alto, USA ...
Emery's Elements of Medical Genetics: Glossary
Genetic Epidemiology Glossary ...
Control elements: DNA sequences in genes that interact with regulatory proteins (such as transcription factors) to determine the rate and timing of expression of the genes as well as the beginning and end of the transcript.
Elements of Geology began as the fourth volume of the third edition of Principles: Lyell intended Elements to act as a suitable field guide for students of geology.[4].
Elements which are members of group IIA. The alkaline earth metals are Be, Mg, Ca, Sr, Ba and Ra.
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 ...
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.
macroelements Essential elements needed for plant growth in relatively large amounts; C, H, O, P, K, N, S, Ca, Fe, Mg.
Response elements are binding sites for transcription factors. Sequences of response elements are required for the functions of the transcription factors.
- Genetic elements (DNA molecule) that may exist either as an integral part of the host chromosome or as independentky replicating DNA molecule (plasmid) free of the host chromosome
Ethidium bromide ...
Promoter elements
Core promoter
Transcription Start Site (TSS)
Approximately -35
A binding site for RNA polymerase ...
Problem 5: Elements of protein structure
Which statement is true concerning the structure of proteins?
A. ...
Hormone response elements (hres) Specific DNA sequences that bind members of the nuclear receptor family of transcription factors; hres for steroid receptors are palindromic 6-bp sequences separated by a 3-bp spacer.
Artificial chromosomeA vector constructed from host cell chromosomal elements such as origin of replication, telomeres and centromere (in eukaryotes).
In structure all ganglia are essentially similar, consisting of the same structural elements"viz., nerve cells and nerve fibers.
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.
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.
Although all eukaryotes contain the common cytoskeletal elements actin and tubulin (both free in the cytoplasm and polymerized in the form of microfilaments and microtubules), intermediate filaments are found only in some metazoan species, ...
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.
Stable isotopes are atomic variations of elements that are stable over long periods of time, meaning they do not radioactively decay. Several elements, like oxygen and carbon, have several stable forms.
In fact, it appears that we may need at least trace amounts of each of the elements in the periodic table.
Small pieces of DNA, such as human DNA, can be attached to appropriate elements, circularized, and then introduced into bacteria, where they are propagated--or in other words, copied--along with the host bacterial chromosome.
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.
transposon insertion Transposable elements (transposons) include a diverse class of DNA sequences that are capable of inserting, excising and relocating into chromosomal or extrachromosomal DNA.
Production of male and female reproductive elements at different times by a hermaphroditic organism in order to ensure allogamy.
Related Terms:
Allogamy ...
These are likely derived from retroviruses; other retroransposons lack viral genes. Retrotransposons are ubiquitous elements in eukaryotic genomes.
Alu repeat sequence A member of a family of repeated DNA sequence elements which is particularly abundant in the primates (about 3 × 105 copies in the human genome).
The Iron of hemoglobin was generated in the moment when the atomic nuclei of a star fused to form heavier elements; for example Iron.
The elements are a start day, a base temperature and the sum of degree days (see preceding entry) required to produce the event of interest.
C = a portfolio that is missing 5-7 elements. Notes are somewhat organized and contain most of the information necessary.
D = a portfolio that is missing 8-10 elements. Notes are disorganized or missing and lack the information necessary.
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.
Inheritance The passing of familial elements from one generation to the next.
Interphase The period in the cell cycle when DNA is replicated in the nucleus; followed by mitosis.
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.
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.
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
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Unlike darkfield, however, this technique requires a specialized microscope objective that includes a "phase annulus" - a ring-shaped coating on one of the lens elements - that must match the incoming cone.
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.
Ecology - the study of the interactions of living organisms with one another and with the non-living elements of their environment.
Embryology - the study of the development of embryo (from fecondation to birth). See also topobiology.
Hippocrates person who lived from about 400 to 300 BC and said that the human body was composed of the four elements (earth‚ air‚ fire‚ and water) plus the four humors (sanguis‚ choler‚ melancholia‚ and phlegma) ...
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Decomposition: The biochemical process where biological materials are broken down into smaller particles and eventually into basic chemical compounds and elements. See also decomposer.
 See also: Trans, Organ, Human, Cells, DNA
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