transport

Xylem

...the phloem , the xylem is one of the two types of transport tissues in plants. The cell walls of xylem cells derive most of their strength from lignin , a chemical compound produced only by plants. Contents showTocToggle("show","hide") 1 Structure 2 Contents 3 Mechanism 4 Referenc...

Virus

...on , transcription , RNA processing , and protein transport . Viruses as tools for genetic engineering Geneticists regularly use viruses as vectors to introduce DNA into cells that they are studying. Attempts to treat human diseases through genetic engineering have also made use of viruses in similar ...

Vesicle

... by at least one lipid bilayer . Vesicles store, transport , or digest cellular products and wastes . ...") 1 Transport vesicles 1.1 Anterograde transport vesicles 1.2 Retrograde transport vesicles 1.3 Mechanisms 2 Vesicle coat 3 External lin...

Vacuole

...ow of water into and out of the vacuole by active transport , pumping ions of potassium (K + ) into and out of the interior liquid. Because of osmosis , wherever solutes go, water follows. This pressure is also helpful for cellular elongation: when the cell wall is degraded (not entirely) by the action ...

Transport protein

A transport protein is a protein involved in facilitated d...pposite side of the protein. There are 3 types of transport proteins, uniporter , symporter / coporter , and antiporter , which facilitate different modes of...

Selective serotonin reuptake inhibitor

...essant drugs on their direct target, the serotonin transport protein, and possible regulatory mechanisms with respect to long-term alleviation of depression, although having been investigated both neurobiologically and clinically over the last years, are not yet understood. Newer medications The majority o...

Endoplasmic reticulum

...s the site of the translation and folding of and transport of proteins that are to become part of the cell...uding the facilitation of protein folding, and the transport of proteins.Correct folding of newly made proteins is made possible by several ER proteins including...

Signal transduction

...g cell by exocytosis or other means of membrane transport . The sending cell is typically of a specialized t...annel proteins that perform the task of controlled transport of Ca 2+ : The InsP 3 -receptor will transport Ca 2+ upon interaction with inositol tr...

Blood plasma

...water, proteins , and mineral salts. It serves as transport medium for glucose , lipids , hormones , produc...metabolism, carbon dioxide and oxygen . (Oxygen transport capacity of plasma is lower compared to that of the hemoglobin in the red blood cells ; it may in...

Endoplasmic reticulum

...s the site of the translation and folding of and transport of proteins that are to become part of the cell...uding the facilitation of protein folding, and the transport of proteins.Correct folding of newly made proteins is made possible by several ER proteins including...

Endoplasmic reticulum

...s the site of the translation and folding of and transport of proteins that are to become part of the cell...uding the facilitation of protein folding, and the transport of proteins.Correct folding of newly made proteins is made possible by several ER proteins including...

Proton pump

...a . See also: transmembrane ATPase active transport cytochrome mitochondrion chloroplast electron transfer chain proton pump inhibitor ATP synthase...

Proteolysis

...l of the signal sequence of peptides after their transport through a membrane Separation of viral proteins that were translated from a monocistronic mRNA Digestion of proteins from foods as a source of amino acids Conversion of predecessor-proteins (proenzymes , zymogens , prehormones ) into t...

Protein

...eins include immune response and the storage and transport of various ligands . In nutrition, proteins serve as the source of amino acids for organisms that do not synthesize those amino acids natively. Proteins are one of the classes of bio- macromolecules , alongside polysaccharides and nucleic ...

Plant

...sistant to desiccation, and vascular tissues which transport water throughout the organism. In many the sporophyte acts as a separate individual, while the gametophyte remains small. The first primitive seed plants, Pteridosperms (seed ferns) and Cordaites, both groups now extinct, appeared in the late Devon...

Cell membrane

... 3 Transport across membranes 3.1 Passive transport 3.2 Active transport 4 References 5 External links A Fluid Mosaic The basic composition and structure ...

Plant

...sistant to desiccation, and vascular tissues which transport water throughout the organism. In many the sporophyte acts as a separate individual, while the gametophyte remains small. The first primitive seed plants, Pteridosperms (seed ferns) and Cordaites, both groups now extinct, appeared in the late Devon...

Photosystem

...ll a, it releases two electrons into an electron transport chain. Though chlorophyll a normally has an optimal absorption wavelength of 660 nanometers , it associates with different proteins in each type of photosytem to slightly shift its optimal wavelength, producing two distinct photosystem types. Othe...

Photosystem

...ll a, it releases two electrons into an electron transport chain. Though chlorophyll a normally has an optimal absorption wavelength of 660 nanometers , it associates with different proteins in each type of photosytem to slightly shift its optimal wavelength, producing two distinct photosystem types. Othe...

Photosynthesis

...ectrons , which are transferred along an electron transport chain , similar to that involved in respiration. ...over the function and significance of the electron transport chain. Factors affecting photosynthesis Light intensity and wavelength Carbon dioxide concen...

Light-dependent reaction

...are accomplished via the mechanism of an electron transport chain . This is a series of proteins embedded in a...lastocyanin before returning to chlorophyll. This transport chain produces a proton-motive force, pumping H + ions across the membrane; this produces a concent...

Phloem

... sap down the tube. In sugar sinks, cells actively transport solutes out of the sieve-tube elements, producing the exactly opposite effect. Organic molecules such as sugars, amino acids , certain hormones , and even messenger RNAs are transported in the phloem through sieve tube elements . Phloem is ...

Phospholipid

... small lipid vesicles , which can then be used to transport materials into living organisms and study diffusion rates into or out of a cell membrane. This membrane is partially permeable , very flexible, and has fluid properties, in which embedded proteins and phospholipid molecules are constantly moving la...

Passive transport

Passive transport is a means of moving biochemicals , and other ...ar substances, across membranes . Unlike active transport , this process does not involve chemical energy .Passive transport is dependent on the permeabil...

Osmosis

...so osmosis demonstration Diffusion Active transport Reverse osmosis Osmosis Jones is also a term which entered popular parlance after the film of the same name, also the alias of a famed botanist....

Nucleotide

...des also play important roles in cellular energy transport and transformations (notably ATP and NAD+/NADH ), and in enzyme regulation (see for example, protein kinase ). The nucleobase can be a purines or pyrimidines , the sugar can be deoxyribose in DNA or ribose in RNA, and the phosphate chain ...

Neurotransmitter

... ion channels to open. Calcium then stimulates the transport of vesicles to the synaptic membrane: the vesicle and cell membrane fuse, leading to the release of the packaged neurotransmitter, a mechanism called exocytosis . The neurotransmitters then diffuse across the synaptic cleft to bind to recept...

Mitochondrion

...e Krebs cycle 2.1.2 NADH and FADH2: the electron transport chain 3 Use in population genetic studies ... 2 , which go on to participate in the electron transport chain . With the exception of succinate dehydrogenase , which is bound to the inner mitochondrial...

Mitochondrion

...e Krebs cycle 2.1.2 NADH and FADH2: the electron transport chain 3 Use in population genetic studies ... 2 , which go on to participate in the electron transport chain . With the exception of succinate dehydrogenase , which is bound to the inner mitochondrial...

Lipase

...s and have roles in the metabolism, absorption and transport of lipids throughout the body. As biological membranes are integral to living cells and are largely composed of phospholipids, lipases play important roles in cell biology . Furthermore, lipases are involved in diverse biological processes ranging f...

Life

... as the performance of mechanical work, the active transport of molecules against concentration gradients, and the biosynthesis of complex molecules." This definition, in use by most biochemists, makes it clear that fire is not alive, because fire releases all the oxidative energy of its fuel as heat. Viruses...

Light-dependent reaction

...are accomplished via the mechanism of an electron transport chain . This is a series of proteins embedded in a...lastocyanin before returning to chlorophyll. This transport chain produces a proton-motive force, pumping H + ions across the membrane; this produces a concent...

Kidney

...ule have numerous mitochondria , enabling active transport to take place by the energy supplied by ATP . Glucose, amino acids, variable ammounts of mineral ions are thus returned to the body. 97.9% of the water in the filtrate enters the convoluted tubules and collecting ducts by osmosis. Fluid flows fr...

Ion channel

... See also transmembrane receptor passive transport active transport Action potential External links The Voltage Sensor in Voltage-Dependent Ion Channels ...

Intermembrane space

...he stroma can bypass the intermembrane space via transport through translocases . These are known as TOM and...rix into the intermembrane space during electron transport . The structures responsible for this are coenzyme q , complex I , complex II , and complex III ....

Insulin

...phrine). Signal transduction There are special transport channels in cell membranes through which glucos...on of protein molecules in the cell membrane which transport glucose into the cell. Two types of tissues are most strongly influenced by insulin as far as the s...

Human

..., irrigation , urban planning , construction , transport , and manufacturing goods. Permanent human sett...f prey . With the advent of large-scale trade and transport infrastructure, immediate proximity to these resources has become unnecessary, and in many places th...

Photosynthesis

...ectrons , which are transferred along an electron transport chain , similar to that involved in respiration. ...over the function and significance of the electron transport chain. Factors affecting photosynthesis Light intensity and wavelength Carbon dioxide concen...

Golgi apparatus

...central delivery system for the cell. Most of the transport vesicles that leave the endoplasmic reticulum (E...ifferent membranous compositions. Function The transport vesicles from the ER fuse with the cis face of the Golgi apparatus (to the cisternae) and empty thei...

Glycolysis

...able to glucose because of the presence of glucose transport proteins, it is impermeable to glucose 6-phosphate. Glucose 6-phosphate is then rearranged into fructose 6-phosphate by phosphoglucose isomerase . (Fructose can also enter the glycolytic pathway at this point.) Phosphofructokinase -1 then consu...

Foot and mouth disease

...mals or with contaminated pens or vehicles used to transport livestock. The clothes and skin of animal handlers such as farmers, standing water, and uncooked food scraps and feed supplements containing infected animal products can harbor the virus as well. Cows can also catch FMD from the semen of infected b...

Cell membrane

... 3 Transport across membranes 3.1 Passive transport 3.2 Active transport 4 References 5 External links A Fluid Mosaic The basic composition and structure ...

Facilitated diffusion

Facilitated diffusion ( facilitated transport ) is a process of passive transport ( diffusion ) via which molecules diffuse across membranes , with the help of transport prote...

Endomembrane system

...ganelles. The endomembrane system also provides a transport system, for moving molecules through the interior ...es the cell from its environment and regulates the transport of molecules and signals into and out of the cell. The nuclear envelope is the membrane around th...

Endoplasmic reticulum

...s the site of the translation and folding of and transport of proteins that are to become part of the cell...uding the facilitation of protein folding, and the transport of proteins.Correct folding of newly made proteins is made possible by several ER proteins including...

Electron transfer chain

...lectron transfer chain (also called the electron transport chain , ETC, or simply electron transport ), is any series of protein complexes and lipid-soluable messengers that convert the reductive poten...

Ebola

... Making sure that teams are trained to prepare and transport bodies for burial (CDC 115-116). The next step i...oses. Three out of the four Japanese airlines that transport monkeys throughout the world have quit transporting monkeys because of the risk of Ebola. Not so lon...

Diffusion

...gy , diffusion is described as a form of " passive transport ", by which substances cross membranes . Con...nks Background Diffusion is one kind of transport phenomenon : compare it, for example, to radiation . All diffusion can be modelled quantitatively ...

Cytosol

...nd controls internal movement of structures, e.g., transport vesicles . As the concentration of soluble molecules increases within the cytosol, an osmotic gradient builds up toward the outside of the cell. Water flows into the cell, making the cell larger. To prevent the cell from bursting apart, molecular...

Cytoskeleton

..., and plays important roles in both intra-cellular transport (the movement of vesicles and organelles, for ex...trosome . They play key roles in: Intracellular transport (asociated with dyneins and kinesins they transport organelles like mitochondria or vesicle...

Ion gradient

...fermenting bacteria which do not have an electron transport chain, and hydrolyze ATP to make a proton gradient, which they use for flagella and transport of nutrients into the cell. In respiring bacteria under physiological conditions, ATP synthase gen...

Cisterna

...is-Golgi network and at the end of the Golgi where transport to other parts of the cell occurs is called the trans-Golgi network. Both are thought to be specialized cisternae leading in and out of the Golgi apparatus....

Chromosome

...s accessible genetic material and become a compact transport form. Eventually, the two matching chromatids (condensed chromatin strands) become visible as a chromosome, linked at the centromere . Long microtubules are attached at the centromere and two opposite ends of the cell. During mitosis, the micr...

Chloroplast membrane

...but the inner membrane is highly specialised with transport proteins . Within the inner membrane, in the regi...roteins, including those involved in the electron transport chain ....

Cell metabolism

... amino acids and simple derivative compounds, for transport into the cell through the plasma membrane and ultimately for the polymerisation into new proteins via the use of ribonucleic acids ( RNA ) and ribosomes . See also Biochemistry Metabolism Metabolic pathway...

Cellular respiration

...oceeds to the mitochondria for use in the electron transport chain. The two molecules of 1,3 diphosphoglycerat...), NADH and FADH2 which travel to the electron transport chain. In this process, an electron is transferred from an energy-rich atom (such as a carbon atom ...

Cell growth

... order to increase the surface area available for transport functions. Yeast cell size regulation The relationship between cell size and cell division has been extensively studied in yeast . For some cells, there is a mechanism by which cell division is not initiated until a cell has reached a certa...

Cell nucleus

.... The nuclear envelope regulates and facilitates transport between the nucleus and the cytoplasm, while separating the chemical reactions taking place in cytoplasm from reactions happening within the nucleus. The outer membrane is continuous with the rough endoplasmic reticulum (RER) and may be studded wit...

Cell biology

... detergents and salts . See also Active transport Adhesion Chloroplast Cilia Cytoplasm ... Mitochondrion Nucleus Organelle Passive transport Ribosome Signal transduction Vesicle Important publications in cell biology Exter...

Carrier

...r Athabaskan language a common carrier , a transport business ( shipping or telecom ) an aircraft carrier Willis Carrier , the inventor of air-conditioning Carrier , the company which he founded Carrier , a video game for the Sega Dreamcast the town of Carrier, O...