week14

Assignment

	Read : Chapter 16
	Study : Objectives 4-8, 10, 11, 14, and 15 in Unit 6

Additional Resources

Answer Study Guide Questions and Check Answers

After you finish studying this unit, take Web Practice Quiz 7

Submit

Internet Project 2 Projects are due at the beginning of the class period. Projects submitted after class has started will lose 10% (5 points).

Instructor's Comments

Note that Objectives12 and 13 are not part of the assignment.

Access Excellence is also excellent for understanding the work you study this week. There are a number of pages that deal with DNA and protein synthesis as well as selective gene expression. This material is all present in your text and Study Guide, but if you would like to see a web version, try exploring the following:

	RNA and DNA This site clearly shows the three major differences between RNA and DNA.
	RNA Synthesis and Processing Follow all the links at this site. This site illustrates transcription and translation. After studying information at this site, you should be able to explain the difference between introns and exons, codons and anticodons, start and stop codons, and why the genetic code is degenerate(!).
	Control of Gene Expression In many cells, only a small number of the genes present in the cell are being expressed. Another way of saying this is that the information in the genes for making particular proteins never results in the production of the protein in the cell. This is obvious if you think about it. For example, the proteins found in red blood cells are very different from the proteins found in muscle cells. However, both cell types in a given organism have exactly the same genes for making exactly the same proteins. This difference in protein content from one cell type to another in the cells of a given organism is due to selective gene expression - different genes get expressed in different cell types. Thus, red blood cells contain the protein hemoglobin that transports oxygen while muscle cells contain the proteins actin and myosin that allow the muscle cell to contract. The figure at this site illustrates the possible points of control. Note that the most common form of gene control is the failure of the gene to ever get transcribed. Why do you think that is the case??

Week 14 Protein Synthesis Gene Expression

Week 14
Protein Synthesis
Gene Expression