This document provides information about microorganisms including bacteria, viruses, and fungi. It defines microorganisms as very small living things and notes that bacteria are single-celled organisms that can be beneficial or pathogenic. Viruses are described as non-living microbes that need a host cell to reproduce. Examples of bacteria, viruses, and fungi are presented along with illustrations of their structures and life cycles. The document also discusses how microorganisms can cause both beneficial and pathogenic effects.
4. Bacteria
The good the bad and the ugly!
Bacteria are small living single celled
organisms that can come in good
(beneficial) forms and bad (pathogenic)
forms that cause disease.
Some
different
shapes of
bacteria
13. VirusesViruses are extremely smallViruses are extremely small
(much smaller than bacteria)(much smaller than bacteria)
NON-LIVING microbes thatNON-LIVING microbes that
needneed
a host cell so that they cana host cell so that they can
reproduce and survive.reproduce and survive.
NON-LIVING
because they
do not fulfil all of the
MRS GREN criteria.
It’s not popcorn! It’s a
picture of a virus!
16. Examples of
viruses
A T4 bacteriophage. This
infects only bacterial cells,
in this case only E. coli
The HIV virus. This attacks
T4 lymphocytes. It is
responsible for AIDS.
23. Fungi
Fungi are organisms that produce spores
and come in the form of moulds, yeasts,
mushrooms and toadstools.
They also help things to rot and breakdown
which is an essential process in the cycle of
life.
Why did the mushroom want
to go out with the toadstool?
Because he was a Fungi to be
with!
24. Examples ofExamples of
fungifungi
Mould growing aMould growing a
bread bunbread bun
Yeast cells buddingYeast cells budding
There can be good forms of
fungus (used to make
bread/beer) and bad forms
(Mould, Athletes foot and
thrush).
25. Mould and fungus causesMould and fungus causes
things to breakdownthings to breakdown