Today’s Plan: 10/27/09 Bellwork: Test Corrections/Update folders (45 mins) Bacteria Notes (25 mins) Virus Video (30 mins) Pack/Wrap-up (last 5 mins)

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Presentation transcript:

Today’s Plan: 10/27/09 Bellwork: Test Corrections/Update folders (45 mins) Bacteria Notes (25 mins) Virus Video (30 mins) Pack/Wrap-up (last 5 mins)

Today’s Plan: 10/28/09 Bellwork: Bacteria Video (30 mins) Bacteria/Virus Contract (40 mins) Viral cycle Notes (20 mins) Pack/Wrap-up (last few mins of class)

Today’s Plan: 10/29/09 Bellwork: Immune System Outline (20 mins) Menu (40 mins) Continue notes (the rest of class)

Today’s Plan: 10/30/09  Bellwork: Vocab Quiz(30 mins)  Finish Menu (30 mins)  Finish Viruses and do bacteria notes(25 mins)  Pack/Wrap-up (last few mins of class)

Today’s Plan: 11/1/07 Bellwork: Label Microscope and list 6 rules for its use (20 mins) Microscope Lab (40 mins) Protist Notes (25 mins) Pack/Wrap-up (last few mins of class)

Today’s Plan: 11/2/07 Protist Article and essential questions (10 mins) Finish Microscope Lab (25 mins) Virus and Microorganisms Quiz (as needed) Pack/Wrap-up (last few mins of class)

Viruses Dead or Alive? Can’t reproduce by itself Doesn’t move No homeostasis What do you think? Structure-see book pictures for tail,DNA, Capsid, Coat Phage=typically used as another word for virus, means that it is infectious.

Viral Cycle Need: 1 virus, 1 host-cell specific to the virus. Viral recognition-viruses disguise themselves w/ their protein coat so that bacteria let them in (they “think” that the virus is something needed.) The virus then attaches and pumps in its provirus (DNA), which joins w/ the host’s DNA for replication. (see camera)

Cycles continued Lytic cycle-viral cycle where the host is reprogrammed and killed immediately. Lysogenic cycle-viral cycle where the viral DNA is inactive for a time before reproduction. Lysogenic cycle explains how viruses, like HIV, HSV, etc. can hide and not appear for some time. Lytic cycle=common cold.

Retroviruses Don’t contain DNA, have RNA provirus in stead. Problem: host has DNA, which can’t join w/ provirus. Solution: inject an enzyme (reverse transcriptase) that can make DNA from the provirus to be inserted into host DNA. See camera Ex: HIV