Essay for biology HELPPPPP!!!!?
come on guys,…easy 10 points, its not that hard, i jus NEED these answered…….
Proteins are manufactures from the "blueprints" found on DNA. After they are translated, they are moved through a system of internal membranes before being distributed throughout the rest of the cell. At some point in this process, they are modified to their functional form.
1.) Describe the movement of proteins from thier manufacturing point through this internal membrane system.
2.) In your own words, discuss the role of each of the following structures in the whole process: cell membrane, vesicles, ribosomes, Golgi apparatus, and endoplasmc recticulum.
(This doesn”t have to be totally perfect, but it does have to get me a passing grade,,,….thanx =)
2 Responses
basheer_nass
08 Mar 2010
sail5084
08 Mar 2010
do your own homework.
learn something. please.
bio is my favorite subject and if you give it a chance and really try to understand it, molecular genetics (transcription and translation specifically) is actually kind of interesting
a copy of the genetic code found in DNA is made in a shape of mRNA strand using the RNA Polymerase- this happens inside the nucleus in eukaryotic cells.
the mRNA strand leaves the nucleus and the two ends are joind to form a ciruclar looking mRNA strand, which attaches itself to the membranes of the RER with the help of proteins.
Ribosomes attaches themselves to the mRNA and begin the syntheses of proteins (more than 1 ribosome is connected to the strand simultaneously so multiple copies of proteins can be made at once from a single mRNA molecule)
the Ribosome are the macheniry to make the proteins, they use tRNA molecules to get the amino acids to build the protein.
as the protein is made it’s guided towards the inside of the rough endoplasmc reticulum(RER) , so the protein moves across the membrane —-|—- in this sort.
some proteins get stuck inside the membrane and some continue to get into the inside of the RER
those who get stuck are then transported to the cell membranes to be part of the intra-membrane-proteins.
and the proteins which get to the lumen (inside) of the ER will counitnue their way towards the golgi apparatus, there more modfication will happen.
after the proteins are fully mature (now found inside the Golgi apparatus), they’ll be transported via vesicles to other parts of the cell or to the Extra cellular matrix.
hope this helps , tell me if you need more:)