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Chapter 3 Blog:  The Chemical Basis of Life II (Robert)

Page history last edited by Robert Canuel Jr. 13 years, 8 months ago

In the first section of this page, you will write a daily summary of that day's class.  For example in  your chapter 2 blog, your first entry should be titled 9/3/10.  You should then write a one or two paragraph summary of that day's lecture, outlining the major points.  In the second section, you are required to add two items (link to a website, video, animation, student-created slide show, student-created PowerPoint presentation) and one journal article pertaining to a topic in this chapter.  A one-paragraph summary must accompany each item describing the main idea and how it applies to the lecture topic.  Please see the PBWorks help guide for assistance embedding video and other items directly in the page.  I will also produce a how-to video on using tables to wrap text around items and other useful tips.  Please see the syllabus for organization and grading details.


A.  Daily Blog



err... Forgot...

Ah nevermind

We talked about the molecule of life, Carbon. Today's first cellphone poll: Why Carbon? my first answer: why not. Then Dr. Weber states that we can probably answer this one in three words, one if we're smart. Well the answer was tetravalent or other things along the lines of that. Then we proceeded to boring Hydrocarbons and functional groups. Some examples of functional groups are the Amino group, Carboxyl and Carbonyl. next we talked about Isomers. Isomers are molcules that have the same molecular formula but have different structures. The different kinds of isomers are: enantimers, cis-trans isomers and some others. Next we talked about sugars like glucose and fructose and the polysacharides: starch, glycogen and cellulose.



Today I was looking forward to another cell phone poll as there is always someone there that likes to mess with the data and vote for the wrong answer. Sadly both polls were broken and would not show the results of the texts. So we answered them verbally. The questions were along the lines of: "What do carboxyl and amino groups have in common?" and "What determines the characteristics of and amino acid?". The answers are as follows: "both groups are in amino acids." and "the R group". We then talked about the elements that make up proteins which are carbon, hydrogen, oxygen and sulfur. There are 20 different types of amino acids, which means that there are 20 different R groups. Those 20 are then categorized into three groups: Polar(Charged), Polar(Uncharged) and Nonpolar. Proteins are amino acids that are joined by peptide bonds and are folded in to different structures to become functional. Primary structure is just the amino acid chain bound to each other via peptide bonds. Secondary structure is when the chain folds in to weird structures such as an alpha helix or a beta sheet. Tertiary structure is the functional form of a single chain protein. These are held together by a bunch of forces such as: disulfide bonds, hydrogen bonds, Electrostatic interactions, etc.



We continued our discussion macromolecules today. Specifically we  continued about proteins, touching briefly on nucleic acids. We defined gene as a discrete unit of DNA that encodes for a functional unit, a protein. Then we were given a paper that had an experiment on it. We were asked to give the hypothesis, explain the procedure and analyze the data which inevitably led to the same conclusion.

B.  Useful Materials





Here is a site that talks about carbohydrates. The site talks about how energy is harvested from them and the different types of carbs. It even comes with pictures of the molecules if the ones in our ebook are not enough. Its just information on carbohydrates.


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A Youtube video on the folding and structures of proteins. The primary structure is a chain of amino acids. The secondary structure is when the protein starts folding itself in to coils or into sheets. Example: alpha helix and beta sheet. The tertiary structure is when the protein is folded in a way such that multiple forces such as van der Waals forces, electrostatic interactions, hydrogen bonds and disulfide bonds keep the protein together. It also shows quaternary structure by introducing protein subunits.





Here's an article about a protein index.This index sorts proteins out by their tertiary structures so scientists can compare them.


Comments (4)

Derek Weber said

at 4:04 am on Sep 16, 2010

9/15: Updated. Functional groups may be boring but as you can see, when we start to discuss how proteins fold/function, they are crticial.

Derek Weber said

at 4:05 am on Sep 16, 2010

Or maybe you meant that hydrocarbons were boring and I totally oversold the importance of functional groups.

Robert Canuel Jr. said

at 9:10 am on Sep 17, 2010

anything nonplar as it hides from water
so that means hydrocarbons and nonpolar functional groups

Derek Weber said

at 4:13 am on Sep 23, 2010

Any more details on the experiment that we reviewed?

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