Macromoecules

A macromolecule is a class of large molecules that are very important biologically. These molecules are involved in all of the structures and processes of cells and organisms. A monomer is any of several small molecular structures that ay be chemically bonded together to form long multi-part polymer molecules. A polymer is a large molecule made up of similar or identical submits called monomers. The four main types of macromolecules are proteins, lipids, carbohydrates, and nucleic acids. Each perform specific functions for cells and each type usually has more than one function. Macromolecules are shown to undergo a reaction that is catalyzed by a polymerase enzyme. Monomers are joined together by a process called dehydration synthesis also called a condensation reaction, where a covalent bond is formed between the two monomers while a water molecule is also formed by a polymerase enzyme. Polymers are broken down by hydrolysis reactions, where the addition of a water molecule breaks the covalent bond holding the monomers together.

Carbohydrates Lab

I was gone for half of the carbohydrate lab, but doing the other half and going over notes in class has helped me to understand it more. We worked with sacharides. There was Monosaccharide, Disaccharide, and Polysaccharide.  We put the 3 different sacharides in 3 different test tubes and added benedict to them. We then stirred them and but them in a hot water bath.The Mono changed to a different color and had a positive affect, It changed with benedict. When we tested the Di it had a negative affect, it didn't change. The Poly also had a negative affect, it turned black in the iodine. If a benedict is added to sugar and it has a color change it would probably most likely be Di because it is the most likely the only saccharine that changes with sucrose. After we did the benedict we tested each saccharide with iodine. With iodine Mono had a negative affect. Di had a negative charge also, and Poly had a positive affect. They were pretty much opposite from each other with the benedict, besides Di because they were both a negative affect with the benedict and iodine. We also tested some foods in this lab. With the starch there was a negative affect with the benedict and a positive affect with the iodine. Cheerios also had a negative affect with the benidct and positive with the iodine. When we tested the corn syrup it was positive with the benedict and negative with the iodine. With the flour it was negative with the benedict and positive with the iodine. Glucose was positive with benedict and i'm not too sure what it was with the iodine. We tested KIX cereal and it had a negative affect with the benedict and positive with iodine. Galactose was positive with benedict and again i wasn't too sure with the iodine. The three elements that were present in the carbohydrates were Hydrogen, Oxygen and Carbon.




https://docs.google.com/document/d/10C6R_cVZGTSDNptVsjkQu0SvSYTuE5eO99st0MCCEOI/edit?hl=en_US

Water Properties

When you think of water, you usually automatically think of drinking water, or water that you shower or bathe in. But what you don't know, and what i didn't even know is that there are many different things about water. Liquid water is the medium of life, and most organisms are over 80% of water. Water also has a high surface tension. That's how leaves float on top of the water when they fall, instead of sinking straight into the water right away. In this class we did a couple of labs but due to volleyball again, i missed some of them so the only one i got to do was the lab with the water and the string. This lab was interesting because it was weird to see the water travel down the string. Some people's groups got the water to travel all the way down he string, but my group didn't. It was pretty difficult, and we couldn't do it unless we had someone kind of guiding the water down the string. Most of the water just spilt out of the beaker straight onto the floor but some of it went down on to the string. When we tried it we got water to go down the string about halfway down. The lab was cool and fun to try.



http://www.youtube.com/watch?v=aHUEtxbDL90

Understanding controlled experiments.

What is science and how does it work? Science is our knowledge of the nature world and the process on how knowledge is built. Science relies on testing of ideas with evidence gathered from the world. Science can't actually be defined, but it can be described as a set of key characteristics.  A Controlled Experiment is an experiment that uses controls and usually separates subjects into one or more control groups. An Independent Variable is a variable that is changed to observe the fact on the dependent variable. A Dependent Variable is a variable that is expected to change when the independent variable changes. A control group is very similar to a controlled experiment. A Placebo is a pill, liquid or powder that has no treatment value. Experimental treatments are usually compared with placebos. A double- blind trial is to investigate efficiency and safety. I understand what a controlled experiment is now, more than i did before because i went through and read all of the different websites that you told us about.