Download Bacteria and Virus Basics

Bacteria and Virus Basics
Bacteria: are prokaryotic cells.
What is
Structure
it?
Type of cell:
Prokayotic
Three types:
Reproduction Harmful or How do
Helpful
we fight?
Two types:
Binary Fission
Conjugation
Is it living?
Yes
Kingdoms:
Archaebacteria
& Eubacteria
Cocci –round
Spirilla – spiral or corkscrew
Bacilla – rod shaped
Other structures:
Cell wall or cell membrane
Flagella – for movement
Ribosomes
Helpful:
 Make some
food, like
yogurt
 Intestinal –
produce
vitamins
 Skin bacteria
– protect us
from fungus
 Stomach
bacteria
maintain pH
in the stomach
Harmful:
 Strep.
 Staph.
 Tetanus
With?
Antibiotics
What are
they?
Antibiotics
are medicine
derived from
fungi,
bacteria, and
other
organisms
that can
destroy other
microorganisms.
Viruses: *Non-living
What is it?
What is it
composed of?
What is a virus? Viruses
are particles of nucleic
acid, protein, and in
some cases lipids that
can reproduce only by
infecting living cells.
Size:
Virus differ widely in
size and structure.
How seen:
With an electron
microscope.
Composed of:
A typical virus is
composed of a core of
either DNA or RNA
surrounded by a protein
coat.
What does Are they
the capsid alive?
do?
Structures
The capsid
typically binds
to the surface of
the cell and
“tricks” the cell
into allowing it
in the inside.
3 types:
 Bacteriophage
 Tobacco
mosaic virus
 Influenza
How do you fight?
With a vaccine – a weaker Capsid:
version of the virus.
Virus’s outer protein
coat.
2 reasons why
not:
1) Not made
of cells
2) Do not
reproduce
independe
ntly
(require a
host cell to
reproduce)
What living
characteristics
Do they have?
Genetic code
They can
regulate gene
expression.
Can evolve.
Virus Types: (see below)
See below