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Zukki Jeewaratnam

Meiosis - Wikipedia, the free encyclopedia - 0 views

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    A process that is similiar to the meiosis except that this process divides the number of chromosomes is cut in half.
tillie j

Endocytosis and Exocytosis - 0 views

  • Endocytosis is a process for moving items that are outside of the cell into the cytoplasm of the cell. Exocytosis is a process for moving items from the cytoplasm of the cell to the outside. Both endocytosis and exocytosis vary from the other forms of membrane transport, because materials do not cross through the lipid bilayer. Instead, items being moved into or out of the cell are engulfed by entire sections of the membrane lipid bilayer. They are being swallowed up or spit out by the membrane so to speak.
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    Lätt, förståelig förklaring på hur endocytos och excytos fungerar.
tillie j

Golgi and Protein Processing - 0 views

  • After translation on ribosomes in the cytosolic compartment all proteins are processed either in the cytosol or in the ER/Golgi system. 
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    Fakta om golgiapparaten. Bra modeller och bilder.
Zukki Jeewaratnam

Mitosis - Wikipedia, the free encyclopedia - 0 views

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    A process that takes act in the cell which separates the chromosomes.
Mbmizgin MB

Plasmid - Wikipedia, the free encyclopedia - 0 views

  • A plasmid is an extra-chromosomal DNA molecule separate from the chromosomal DNA which is capable of replicating independently of the chromosomal DNA.[1] In many cases, it is circular and double-stranded. Plasmids usually occur naturally in bacteria, but are sometimes found in eukaryotic organisms (e.g., the 2-micrometre-ring in Saccharomyces cerevisiae). Plasmid size varies from 1 to over 1,000 kilobase pairs (kbp).[2][3][4] The number of identical plasmids within a single cell can range anywhere from one to even thousands under some circumstances. Plasmids can be considered to be part of the mobilome, since they are often associated with conjugation, a mechanism of horizontal gene transfer.
  • Plasmids used in genetic engineering are called vectors. Plasmids serve as important tools in genetics and biotechnology labs, where they are commonly used to multiply (make many copies of) or express particular genes.[2] Many plasmids are commercially available for such uses. The gene to be replicated is inserted into copies of a plasmid containing genes that make cells resistant to particular antibiotics and a multiple cloning site (MCS, or polylinker), which is a short region containing several commonly used restriction sites allowing the easy insertion of DNA fragments at this location. Next, the plasmids are inserted into bacteria by a process called transformation. Then, the bacteria are exposed to the particular antibiotics. Only bacteria which take up copies of the plasmid survive , since the plasmid makes them resistant. In particular, the protecting genes are expressed (used to make a protein) and the expressed protein breaks down the antibiotics. In this way the antibiotics act as a filter to select only the modified bacteria
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  • Fertility-F-plasmids, which contain tra-genes. They are capable of conjugation (transfer of genetic material between bacteria which are touching). Resistance-(R)plasmids, which contain genes that can build a resistance against antibiotics or poisons and help bacteria produce pili. Historically known as R-factors, before the nature of plasmids was understood. Col-plasmids, which contain genes that code for (determine the production of) bacteriocins, proteins that can kill other bacteria. Degradative plasmids, which enable the digestion of unusual substances, e.g., toluene or salicylic acid. Virulence plasmids, which turn the bacterium into a pathogen (one that causes disease).
Julia Breedh

Chloroplast - Wikipedia, the free encyclopedia - 0 views

  • Chloroplast
  • Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis. Chloroplasts capture light energy to conserve free energy in the form of ATP and reduce NADP to NADPH through a complex set of processes called photosynthesis.[
tillie j

The Golgi Apparatus - 0 views

  • The Golgi apparatus is a cell structure mainly devoted to processing the proteins synthesized in the endoplasmic reticulum (ER).
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    Hemsida på engelska som fördjupar sig i golgiapparatens funktion. Inte jättelätt att förstå men man klarar det ändå. Har modeller på hur den den ser ut och hur den fungerar.
Julia Breedh

Fotosyntes - Wikipedia - 0 views

  • Fotosyntes
  • Fotosyntes är den process där levande organismer tar hand om energi från ljus och lagrar den i kemiska bindningar. Fotosyntesen tillverkar energirika syre- och kolhydratmolekyler av koldioxid och vatten. Fotosyntes i växter försiggår i kloroplasterna i bladen på dagen med användning av solljuset.
  • Fotosyntesen sker i särskilda strukturer, kloroplaster hos eukaryoter, som finns i växtcellerna.
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  • Prokaryoter har inte kloroplast.
  • som sitter på ytan av små membransäckar, tylakoider, inuti kloroplasterna.
  • Den kemiska reaktionen som binder solljuset sker genom molekyler av klorofyll
  • Processens delsteg i huvuddrag
  • Ljusreaktionerna
  • Mörkerreaktionerna
  • Processens delsteg i huvuddrag
  • Processens delsteg i huvuddrag
  • Mörkerreaktionerna
  • Processens delsteg i huvuddrag [redigera]
  • Ljusreaktionerna
  • Ljusreaktionerna [redigera]
  • Mörkerreaktionerna
  • Resultatet av dem är att energi lagrats i ATP och NADPH.
tillie j

Microtubules Help Golgi Get Itself Together : Vanderbilt-Ingram Cancer Center - 0 views

  • Microtubules are the main component of the cell’s internal scaffolding (cytoskeleton). One of their main functions is to transport organelles and proteins required for a cell to move and divide. While the majority of microtubules originate from a small structure near the nucleus called the centrosome, Irina Kaverina, Ph.D., and colleagues previously identified a unique subset of microtubules that originate from the Golgi complex — a structure inside the cell that processes and packages proteins for transport.
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    Forskning om hur cancer ska botas med hjälp av golgi.
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