Class Notes (839,552)
United States (326,029)
Boston College (3,572)
Biology (481)
BIOL 3150 (23)
Cam (23)
Lecture

Genomes of Prokaryotes and Eukaryotic Organelles.docx

1 Page
89 Views

Department
Biology
Course Code
BIOL 3150
Professor
Cam

This preview shows half of the first page. Sign up to view the full page of the document.
Description
Genomes of Prokaryotes and Eukaryotic Organelles • Prokaryotes = Bacteria and Archaea • Prokaryotic cells distinguished by absence of nucleus, DNAconcentrated instead at nucleoid • Plasmids existing in multiple copies not usually considered part of prokaryotic genomes, but blurred in species where plasmids contain essential genes o Bacterial plasmids usually encode genes whose products confer some advantages to host cells under certain growth conditions (ex. Fertility, Resistance) • Genomes of all prokaryotes are composed of double stranded DNAthat could either be circular or linear ranging from 1 to several chromosomes • Bacterial genomes are usually less than 5Mb, seems to be a limit to minimum of genes (~500) required for free living cell • General correlation between gene number and size of prokaryotic genomes • General trend in reduction of genome sizes and ranges from free-living prokaryotes to obligate parasites to obligate symbionts • Most bacterial genes are devoted to translation and metabolism • Comparative genomics analysis shows that genomes of many prokaryotes contain a lot of genes acquired through lateral gene transfer (LGT), which challenges species concept based on gene flow o Lateral gene transfer: acquisition of genetic
More Less
Unlock Document

Only half 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


OR

Join OneClass

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

Sign up

Join to view


OR

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.


Submit