Transcript Today, 4/4/00 (If you`re out of your seat w/o permission, you will get

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
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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
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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