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Chapter 4 Blog: General Features of Cells (Lauren)

Page history last edited by Lauren Banjo! 13 years, 2 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


What is the surprise Dr. Weber has for us??? We briefly talked about prokaryotic cells, which are mainly bacteria cells and are small. Eukaryotic cells are bigger and have organelles and a nucleus. Ribosomes are in both types of cells, and they're important for protein synthesis. In eukaryotic cells, proteins are made in the rough ER, go to the Golgi and go to the plasma membrane if they're meant to. Sulfer-35 is used to to trace the path of radioactive proteins.



Yay iPod touches! There are 3 methods for protein trafficking: costranslatinal modification (rough ER), cytoplasmic (free ribosomes), post-translational (semi-autonomous). Signal Recognition Particle (SRP). If someone had a gene mutation where the first 40 amino acids are missing, the ER signal sequence is missing. Therefore, proteins stay in the cytoplasm and don't know where to go. It's cystic fibrosis and the cells are hypertonic. 


B.  Useful Materials



PubMed Article:

Delayed effects of exposure to a moderate radiation dose on transcription profiles in human primary fibroblasts.


Ionizing Radiation can be dangerous to humans. It can alter someone's gene expression. This results in problems with many functions, including protein trafficking.


Video: BioRap






This rap talks about DNA replication and protein synthesis. First, in DNA replication, A and T pair and G and C pair, and there is a sugar phosphate backbone. Then in RNA, C is replaced with U. The ribosomes play a big role in protein synthesis. Every 3 letters is a codon, and there is an amino acid in each codon.

Animation: Cell Internal Structure








This is an interesting animation on the structure of a cell. It shows all the organelles and functions happening on the cell on a visible basis. I really like this artist's interpretation. It sort of looks like an underwater coral reef!



Comments (1)

Derek Weber said

at 1:09 am on Nov 23, 2010


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