Class Notes (839,150)
Canada (511,218)
Biology (844)
BIOL 121 (154)

Biol 121- 2010.03.03- Genetics- Eukaryotic Gene Expression (Ch. 18, 21).docx

2 Pages

Course Code
BIOL 121
Carol Pollock

This preview shows 80% of the first page. Sign up to view the full 2 pages of the document.
Biol 121 225 Freeman Ch 18 21Mar 3 10 Genetics 11Eukaryotic Gene Expression Differentiation is the process by which cells specialize in function for example a cell can become a neuron nerve cell a smooth muscle cell or a blood cell WBC or RBC Stem cells stem cells are cells that have yet to differentiatethey are able to become any type of cell Source they can be found in bone marrow in adults they can also be found in embryos embryonic stem cells Where can control of gene expression 1 Chromatincondensationif DNA is condensed RNAP cannot access and occur in eukaryotes therefore transcription cannot occur 2 Transcriptionwhere most control occurs with regulatory proteins 3 Alternate splicinga process by which not only introns are removed but also selected exons during RNA spicingthis way many different mRNAs may be translated into different proteinstherefore one gene can code for multiple proteins in humans 80 genes are alternatively spliced Cancer uncontrolled cell growth Caused by caused by1 Defect in cell cycle control2 Mutation that knocks out key genes tumour suppression genes are the brakes on the cell cycle to avoid abnormal growth protooncogenes genes
More Less
Unlock Document

Only 80% of the first page are available for preview. Some parts have been intentionally blurred.

Unlock Document
You're Reading a Preview

Unlock to view full version

Unlock Document

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.