Class Notes (835,108)
Canada (508,934)
York University (35,180)
Biology (2,238)
BIOL 1000 (377)
Lecture 3

Lecture 3 - Genetics.docx

2 Pages
Unlock Document

BIOL 1000
Michael Gadsden

BIOL 1010 Lecture 3 07/10/2010 Notes from last week  More than one virus type to affect certain hosts  The proteins are different, when mixed a new virus pops out of it o This is dangerous because our bodies don’t have antibodies to fight it (eg. H1N1 or H1N3 etc.)  Exchange of genetic material to create a brand new virus E coli and Molecular Biology  Watch ANIMATIONS ON THE BOTTOM  Viruses o Is it alive? Unknown because of the fact that they can only manipulate host cells o In the nucleus (where the viral DNA is kept) is where new viruses are made  Retroviruses o Special class of +RNA using Reverse Transcriptase to make new viruses grow o RNA-DNA-RNA  dsRNA o once injected into the host cell it enters the nucleus, reproduces and then codes for DNA to RNA to make proteins  Viral Envelope  phospholipid membrane o Derived from host and has viral proteins in it o Naked inject DNA into cell o Like bacteriophages o GENOME (inner); Viral Capsid (hexagon), Envelope (Circle) o Ie. Lambda virus – see sheet 4  Membrane Fusion o Envelope of the virus becomes part of the host cell membrane o Capsid opens and releases genomes into the cell o When exiting the cell it binds to the membrane and uses this as an envelope of the virus  rRNA (continued) o has a job to do (tertiary structure) and therefore has a phenotype  Conservative o How many genotypes and phenotypes remain the same as evolution occurs  Natural Selection o The environment selects (via certain selective pressures
More Less

Related notes for BIOL 1000

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.