Cell Membrane
Cell Membrane/ Electron Transport Chain / Biochemical Pathway1. The cell membrane structure is vital to the life of the cell. The cell membrane is shaped as having a phosphate head at the very outer surface, and two fatty acid tails hanging from it. The membrane is double, so at the tip of the fatty acid tails, there are two more fatty acid tails attached to another phosphate head. This is what it looks like: The reason the cell membrane is shaped like this is mainly to control the water flow in and out of the cell. Water is very important to the cell: if too much water enters the cell, the cell will explode, and if too much water leaves the cell, the cell will shrivel up and die. This is how the cell membrane controls water flow: the phosphate heads are polar, and slightly attract water. However, the fatty acid tails in between are non polar, and repel water, so the fatty acid tails prevent too much water from entering or leaving the cell. With this tough membrane, there has to be a way for things to
Thus, reactant #1 can no longer bind with enzyme #1, effectively shutting down the entire process. These membranes are very important to the electron transport chain. When the cell needs more end-product, it removes the end-product from the allosteric site of enzyme #1, and reactant #1 can bind with enzyme #1 to form reactant #2, and so on. Biochemical pathways play a very important role in our body. The ways that require energy are put into a category called active transport, while the ways that don't require energy are put into a category called passive transport. This is how it works: the reactant binds with the first enzyme to become reactant # 2, then reactant 2 binds with enzyme 2 to become reactant 3, and reactant 3 binds with enzyme 3 to become reactant 4, and so on. The electron transport chain in the mitochondria membrane pumps protons out of the cell (from an are of low concentration to an area of high concentration) and then they are forced into the cell through the ATP synthetase channels. This is because they house the membrane proteins that make up the electron transport chain. The allosteric site of enzyme #1 is shaped like the end product, and when there is a high concentration of the end product, it binds with the allosteric site of enzyme #1, changing the shape of the active site of enzyme #1. The two electron transport chains are similar in that they both make ATP by chemiosmosis, and they are different in the fact that they pump protons in different directions: the electron transport chain in the thylakoid layer pumps protons in the cell (from an area of low concentration to an area of high concentration) then the protons are forced out through the ATP synthetase channel. This is where the channel proteins come in. When the cell has enough of the end product, the way it shuts the biochemical pathway is very interesting.
Common topics in this essay:
Biochemical Pathway,
electron transport,
enzyme #1,
fatty acid,
fatty acid tails,
electron transport chain,
acid tails,
low concentration,
transport chain,
cell membrane,
site enzyme #1,
site enzyme,
binds enzyme,
biochemical pathway,
Transport Chain,
low concentration concentration,
allosteric site enzyme,
|
Acceptance Essays
