Friday, October 29, 2010

Cell membrane

This is a picture we drew of a cell membrane.  It is made from phospolipids connecting together because they a hydrophobic.  They then serve as a good barrier for the insides of the cells.  There are also different proteins in the wall, these proteins serve many functions.  The transport protein allows needed molecules to come inside the cell. Receptor proteins bind to other cells and lets them communicate.  The recognition proteins let the other cells know what kind of cell it is and what animal its from.  Those are some of the basic functions of the cell wall.

Wednesday, October 13, 2010

Research article

http://researchspace.ukzn.ac.za/jspui/handle/10413/604


     This articles is about the special carbohydrates that are found in avocados.  Heptose is very rare and only found in nature in avocodo's.These carbohydrates are a source of energy, storage and phloem-mobile transport sugars, and precursors for formation of antioxidants.  Heptose carbohydrates have increasing interest because it has multifunctional roles.  The complex name for these carbohydrates in Heptoses D-mannoheptulose.  This carbohydrate is found in the soft edible part of the avocado and is prestent in all growth stages of the avocado. 


     I choose to research this articles because it was enteresting.  I don't think that this knowledge will help us in the future but it does help us understand the way that fruits grow.  The reason this article intersested me so much was because heptose carbohydrates are only found naturaly in avocodos.  The heptose carbohydrate is the only carbohydrate that I had heard of that had more than one function.  I did research and it turned that I hadn't heard of a dual function carbohydrate for a reason.  The heptose carbohydrate is the only carbohydrate that is known about that serves more than one purpose.  This makes the avocado very rare and something that many scietists will research.  That in my opinion is really awesome and is the reason why I chose to do my research article on the heptose carbohydrates in avocados.

Monday, October 4, 2010

changing colors

This lab really fascinated me and it was hard for me to believe that the substances would change like they did.  I had to see it to believe it.  The thing I didn't believe was that just having a few more sugar molecules bonded together would affect how it changed.  The first thing we did was to mix the sugar in with the water in 3 beakers.  There was a monosaccharide, disaccharide, and a polysaccharide.

After that we split each beaker up into 2 different test tubes.  Then we added benedict's solution to one and iodine to the other.  We put the ones with benedict's solution in the boiling water and left the iodine solutions on the rack.

After a minute passed we pulled the test tubes out of the water and lined them up with iodine solutions on the rack.

In the end the monosaccharides had an orange benedict's solution and a clear brown iodine solution.  The disaccharides had a clear light blue benedict's solution and a clear brown iodine solution.  The polysaccharide had a clear benedict's solution and a dark brown iodine solution.

This lab helped me realize that even the smallest amount of change in a molecule can affect how they react.  It also showed me that the different types of sugar can affect the way your body works.  That is what the lab taught me.