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Microbiology
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Created by
Neili De Costa
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Cards (26)
The
cell membrane
controls
entry
and
exit
of
molecules
into a cell. It is inside the cell and fully
permeable
.
Cell reactions
occur in the
cytoplasm
Sporangium
contains
spores
The
slime capsules
function
is being a a
protective
layer.
It helps
prevent
attacks by
antibiotics
and
immune
systems
The
protein coat’s
purpose is to be the
outer layer
that protects the
DNA
or
RNA
and is involved with
entry
into the
host cells
The
flagellum’s
function is to
allow
movement
of the cell. It is full
permeable
to
molecules.
Spores
are used in
asexual
reproduction
of the
microorganisms
. They are
clones
, spread by
wind
water
and
animals
.
Fungi
can be
unicellular
(one cell) or
multicellular
(multiple cells)
A
fungi
has a
cytoplasm
, a
vacuole
, a
cell membrane
, a
cell
wall
, a
nucleus
and
food
starch
granules.
Bacteria
are
unicellular.
They do not have a
nucleus
but instead have
free
DNA
in their
cytoplasm
. A
single
bacteria
is known as a
bacterium
.
A
bacterium
has a
slime capsule
, polo, a
cell wall
,
cell membrane
, DNA,
ribosomes
, cytoplasm, cytoplasm, flagellum,
plasmid
.
Pili
attatch a
bacteria
cell
to surfaces and other cells.
Ribosomes
make
protein
Plasmid
is a loop of
DNA
that can be exchanged by
bacteria
Aseptic
techniques
ensure the
microorganisms
being investigated do not escape or become
contained
with an
unwanted
microragnism
A
microorganism
is a
living
organism
that can only be observed under a
microscope
.
A
culture
is growing
bacteria
Aseptic Techniques
practical:
Sterilise
the
petrified
dish and
agar
using an
autoclave
to kill any
unwanted
bacteria.
Wipe bench with
disinfectant
Innoculating
loop when
transferring
cultures
Pass the loop in a flame
Take
culture
using
sterile
loop. Transfer it in the agar plate.
Make sure the Petri dish lid opens as little as possible to prevent any unwanted
microbes
from the air to grow
Close the lid and pass the
inoculating loop
in the flames again
Securely tape the Petri dish lid back on
Incubate
spat an
appropriate
temperature
for
microbes
to
grow.
Wash hands thoroughly
Bacteria
and
fungi
can grow on
agar gel
because agar jelly contains
nutrients
for them to
grow
Antiseptics
are used on
living
organisms
like human skin but
disinfectants
are used on
non-living
organisms
like counter tops.
What is Pasteurisation?
Heating.
What is binary fission?
A form of
asexual
reproduction in which a single
organism
divides into two equal parts, each of which becomes a new individual.
What is the difference between a pathogen and a microorganism?
Pathogen:
Disease-causing
microorganism.
Microorganism
:
A
living
organism
that
is
too
small
to be
seen
with
the
naked
eye.
How are micro organisms transmitted?
Contact
,
droplets
, airborne,
fecal-oral
,
vector-borne
.
How do fungi reproduce?
Spores
How do viruses reproduce?
By hijacking the
host cell's
machinery to replicate their
genetic material
and assemble new virus particles.
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