active

Vitamins

... food processing but the non-enzymic ones can be active also in heat-treated food and might also be active after consumption of the food, as is claimed with b-carotene, and vitamins A and E. Full article ...

Vitamin

... food processing but the non-enzymic ones can be active also in heat-treated food and might also be active after consumption of the food, as is claimed with b-carotene, and vitamin s A and E. Full articl...

Variety

...understood, but some form parts of spliceosome s, active in RNA splicing . smooth ER ... Full article >>> curare A variety of poisonous plant extracts from the bark , roots , stems, and tendrils of several woody lianas, including Chondodendron tomentosum. Full article >>...

Vaccine

...ine is an antigen ic preparation used to produce active immunity to a disease, in order to prevent or ameliorate the effects of infection by any natural or 'wild' strain of the organ ism. Full article >>> Vaccine s were previously made by killing or weakening a virus or bacteria a...

Uric acid

...ant and thus can protect cells from damage by re active oxygen species (ROS). [Link] The concentration of uric acid is 100-times greater in the cytosol than in the extracellular fluid. Full article >>> uric acid [Gk. ouron, urine ] An insoluble precipitate of nitrogenous waste ex...

Untranslated RNA

...ated RNA s, of which only two are known to play an active role in the X inactivation process, Xist and Tsix....ated RNA s, of which only two are known to play an active role in the X inactivation process, Xist and Tsix. Full article >>>...

Transposase

... sequence . The methylated promoter is much less active that the non-methylated one. Full article >>> Class II transposon s move by cut and paste, rather than copy and paste, using the transposase enzyme . Different types of transposase work in different ways. Full article >...

Transport protein

Transport protein s are also used in active transport . The proteins bind to the larger mol...on al changes ... Full article >>> active transport A process that requires an expenditure of ATP energy to move molecule s across a cell...

Transformation

... nature some bacteria l species have a specific active uptake system. Full article >>> The Iro-C- cells in the notum, which did not express wg autonomously (Fig. 3I) (in accordance with their transformation toward hinge cells ), caused their wild-type neighbors closest to the NP r...

Transfection

... nature some bacteria l species have a specific active uptake system. Full article >>> When the D segment -flanking signals are of the 12 bp type, then the J segment signal sequence will have a 23 bp spacer, as will that at the VH gene . RAG1 and RAG2 are purified proteins isolate...

Thoracic cavity

...bottom wall of the thoracic cavity in mammals ; active in ventilating the lungs . diastole (dy-ass-toh-lee) ... Full article >>>...

Suppression

...m cells , removal of the intron is allowed. The active transposase is made. This is an example of regulation by differential splice site suppression . Full article >>>...

Substrate

...irect trans fer of a re action product from the active site of one enzyme directly to the active site of a different enzyme , where it serves as a substrate . Full article >>> Eda...

Stomata

...educes the yield of photosynthesis , because the active site of rubisco accepts O2 in place of CO2 and generates no ATP . This usually occurs on hot, dry days when stomata are closed and the O2 concentration in the leaf exceeds that of ... Full article >>> trans piration Passage of w...

Stem

...t]. An undifferentiated cell that is mitotically active in either replacing dying body cells ( somatic stem cell ) or producing gametes (germinal stem cell ). Full article >>> Stem Cell s Index to this page Types of Stem Cell s Using Stem Cell s for Human Therapy - Th...

Stem cell

...t]. An undifferentiated cell that is mitotically active in either replacing dying body cells ( somatic stem cell ) or producing gametes (germinal stem cell ). Full article >>> Stem cell s are cells that divide by mitosis to form either two stem cell s, thus increasing the size ...

Spore

...o environment al influences but which will become active under suitable conditions. Full article >>> spore [Gk. spora, seed ] In the life cycle of a plant or alga undergoing alternation of generations, a meiotically produced haploid cell that divides mitotically, generating a multicel...

Species

... interbreeding. Full article >>> Re active Oxygen Species (ROS) Re active oxygen species are molecule s like hydrogen peroxide (#5) ions like the hypochlorite ion (#6) ...

Smooth muscle

... at least partly dependent on the production of re active oxygen species in endothelial and/or smooth muscle ... Full article >>> serotonin - increase vascular permeability and smooth muscle contr action . Origin ates from platelets ... Full article >>> parasympatheti...

Site

...te Credit ... Full article >>> The active site in many enzymes can be inhibited or supp...f inhibition. Full article >>> The active site of an enzyme is the binding site where cata lysis occurs. The structure and chemical ...

Sieve tubes

...flow, moving into and out of the sieve tubes by active transport and diffusion . Full article >>>...

Sequence

...cle >>> Aerobic cells produce re active oxygen species as a con sequence of normal cellular metabolism , and an array of antioxidant systems are in place to maintain the redox balance. Full article >>> They guide the formation of exact copies of their own sequence thr...

Semen

...lly touted by Aristotle that it's the male that is active and that heat will actually trigger male sex determination: depending on how warm or hot the male semen was the baby would be ... Full article >>> Ejaculation expulsion of semen (e- = out without from; jacul = throw) ... Full art...

Scale

... cut. Full article >>> crawler. The active first instar of a scale insect. crochets. Tiny hooks on the prolegs of caterpillars. Full article >>> Honeydew: The sugary liquid discharge from the anus of certain insects (Homoptera) such as aphids and scale s. Host : The orga...

Roots

... minerals (inorganic ions) into their roots by active transport . The gills of marine fish have cells that can remove salt from the body by pumping it into the salt water. Full article >>> Mycorrhizae . Fungi that form symbiotic relationships with roots of more developed plant s...

Ribozyme

...at function like enzymes , that is, they have an active site and increase the rate of specific chemical r...icle >>> Ribozyme : A catalytically active RNA . A good example is the hepatitis delta virus RNA which is capable of self- cleavage and s...

Ribosomal RNA

...ribosomes of cells . Ribozyme : A catalytically active RNA . A good example is the hepatitis delta virus RNA which is capable of self- cleavage and self- ligation in the absence of protein enzymes . Full article >>> r RNA : ribosomal RNA ; RNA molecule s that function to manu...

Rhodopsin

...alobacteria . See also: trans membrane ATP ase active transport cytochrome mitochondrion chloroplast electron trans fer chain proton pump inhibitor ATP synthase ... Full article >>> (I've recently stumbled onto a reference that claims that vertebrate rhodopsin and bacter...

Resolution

...ion and Sensitivity Arthropods that are apt to be active in dim light (e.g., crayfish, praying mantis) concentrate the screening pigment s of their ommatidia into the lower ends of the pigment cells . Full article >>> Resolution . The smallest amount of change that an instrument can d...

Repressor

...m cells , removal of the intron is allowed. The active transposase is made. This is an example of regulation by differential splice site suppression . Full article >>>...

Recombinant

... nature some bacteria l species have a specific active uptake system. Full article >>> Polyhistidine-tags are often used for affinity purification of polyhistidine-tagged recombinant proteins that are express ed in Escherichia coli [1] or other prokaryotic expression systems. Ful...

Pseudogene

... inactive gene that usually origin ated from an active gene Source: Jenkins, John B. 1990. Human Gen...gene An inactive gene derived from an ancestral active gene . Pseudogene s are often recognized by non sense or frameshift mutation s that disrupt an ...

Proteins

... . Full article >>> Proteins : The active molecule s in all cells . Proteins control biochemical reactions and determine the physical structure of organ isms. Full article >>> proteins - long linear polymers of amino acids joined head to tail by peptide bond bet...

Protein

... Full article >>> Protein s : The active molecule s in all cells . Protein s control biochemical reactions and determine the physical structure of organ isms. Full article >>> protein kinase s - Enzyme that trans fers the terminal phosphate group of ATP to a...

Promoter site

...promoter site , as an increase in the amount of an active transcription factor binds a target DNA sequence . Other proteins , known as "scaffolding proteins " bind other cofactors and hold them in place. Full article >>> The region of DNA where the repressor protein binds is the ...

Programmed cell death

... - also known as programmed cell death (PCD); an active cellular process (" cell suicide") consisting of a stereotyped set of events including nuclear condensation, chromosome degradation, ... Full article >>> Radicals and Oxidative Stress: Environment , Drugs and Food Additives Essays ...

Polytene

...length of a polytene chromosome ; the site of active transcription . A diffuse uncoiled region in a polytene chromosome where transcription is actively taking place. 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 ... Full article >>> The mature larva e show giant chromosome...

Polysome

...id to be polyribosomal when there is more than one active ribosome . In this case, the collection of ribosomes working at the same time is referred to as a ' polysome '. Full article >>>...

Polypeptide

... is an example of a polypeptide . Proteins : The active molecule s in all cells . Proteins control biochemical reactions and determine the physical structure of organ isms. Full article >>> Polypeptide s Bacitracin Eye, ear or bladder infections; usually applied directly to the eye ...

Polyp

...s an example of a polyp eptide . Proteins : The active molecule s in all cells . Proteins control biochemical reactions and determine the physical structure of organ isms. Full article >>> polyp hyletic Pertaining to a taxon whose members were derived from two or more ancestral f...

Polygenic inheritance

...s due to more than one gene locus . It involves active and inactive alleles . Active alleles function additively. Full article >>> polygenic inheritance . Inheritance of trait s influenced by multiple alleles ; trait s show continuous variation between extremes; offspring are ...

Polygenic

...s due to more than one gene locus . It involves active and inactive alleles . Active alleles function additively. Full article >>> polygenic inheritance . Inheritance of trait s influenced by multiple alleles ; trait s show continuous variation between extremes; offspring ar...

Photosystem

... binds to a site on the enzyme other than the active site non cyclic electron flow The light-induced flow of electrons from water to NADP in oxygen -evolving photosynthesis involving both photosystem s I and II. Full article >>> A large number of Synechocystis mutants has been gene...

Photosynthesis

...the green material found in chloroplasts that is active in photosynthesis Chloroplasts - membrane-bou...educes the yield of photosynthesis , because the active site of rubisco accepts O2 in place of CO2 and generates no ATP . Full article >>> ...

Peptides

...n . The shortened polypeptide s then fold into an active protein . One of the most common of these cleavage s is the removal of specific signal peptides . Full article >>> A method of separating large molecule s (such as DNA fragments, peptides or proteins ) from a mixture of simila...

Peptide

...s an example of a poly peptide . Proteins : The active molecule s in all cells . Proteins control biochemical reactions and determine the physical structure of organ isms. Full article >>> Poly peptide ( protein ). A polymer composed of multiple amino acid units linked by pep...

Passive transport

... molecular substances, across membranes . Unlike active transport , this process does not involve chemical energy. Full article >>> passive transport The diffusion of a substance across a biological membrane. pathogen ... Full article >>> Passive transport Main articl...

Oxygen

Re active oxygen species are formed by several different mechanisms: the inter action of ionizing radiation with biological molecule s as an unavoidable byproduct of cellular respiration . Full article >>> The family of haem oxygen a...

Osmoregulation

Osmoregulation is the active regulation of the osmotic pressure of bodily fluid... article >>> Osmoregulation is the active regulation of the osmotic pressure of body fluids to maintain the homeostasis of the body's water ...

Organelles

...the green material found in chloroplasts that is active in photosynthesis ... Full article >>> The mitochondria l permeability transition (mPT) involves the opening of a non-specific pore in the inner membrane of mitochondria , converting them from organelles whose production of AT...

Organelle

...the green material found in chloroplasts that is active in photosynthesis ... Full article >>> The mitochondria l permeability transition (mPT) involves the opening of a non-specific pore in the inner membrane of mitochondria , converting them from organelle s whose production of ...

Nucleus

...the green material found in chloroplasts that is active in photosynthesis ... Full article >>> In this technique, the nucleus of a recipient egg is removed to make way for the genetic material of the donor (Fig. 5). The donor cell is fused with the enucleated egg cell by subje...

Nucleolus

...e nucleus , formed from various chromosomes and active in the synthesis of ribosomes . Full article >>> nucleolus - structure in the nucleus where ribosomal RNA is trans cribed and ribosomal subunits are assembled Okazaki fragments - short lengths of DNA produced on the laggin...

Nucleoli

...e nucleus , formed from various chromosomes and active in the synthesis of ribosomes . Covered in Lab 3 Cell Biology ... Full article >>> found chiefly in cytoplasm and nucleoli ; may be involved in trans mitting hereditary information from the nucleus to cytoplasm Source: Nol...

Natural selection

...t evolution by natural selection may not be as active in human s, but then we are imposing other kinds of selection , which are not part of the natural selection s, so I think it's an interesting thought, ... Full article >>> (i) A laboratory process using mechanisms of natural select...

Myosin

...rcomere , detach and then reattach to the nearest active site of the actin filament. Full article >>> myosin (my-uh-sin) [Gk. mys, muscle ] A type of protein filament that interacts with actin filaments to cause cell contr action . Full article >>> myosin A large...

Myelin sheath

...ulse s — a trait probably as important for active vertebrates as their jaws. an adaptive immune system backing up their innate immune system . Full article >>> myelin sheath : a fatty layer of material that covers the axons of nerve cells . myofibrils : microscopic filaments ...

Mutagenesis

...mately 200 sites, covering a large portion of the active site , were chosen for saturation mutagenesis . Full article >>> Directed mutagenesis Two new papers examining the phenomena of directed mutation s have recently appeared in the literature. I'll quickly review these experiments i...

Mutagen

... the next post. Full article >>> an active mutagen in the Ames test ; causes an increase in the incidence of tumor s in rats (that are forced to swallow water containing levels of MX far higher than those ever found in water supplies). Full article >>> Saturation mutagen...

Motif

... , that usually serves as a recognition site or active site . The same motif can be found in a variety of types of organ isms. Full article >>> A common motif in the secondary structure of proteins , the alpha helix (α-helix) is a righthanded coiled conformation , resembling a...