Microbes Flashcards
microbes
organisms that are microscopic (too small to be seen with the naked eye)
pathogens
microbes that can cause disease
What are the types of microbes?
bacteria
fungi
protoctista
viruses
Size: fungi
yeast =
mould =
range =
Size: fungi
yeast = 100 µm
mould = 5 µm
range = 5 µm to several cm
Size: protoctista
amoeba =
algae =
range =
amoeba = 100 µm
algae = 10 µm
range = 10 µm to several metres (e.g. algae)
Size: bacteria
E.coli =
range =
Size: bacteria
E.coli = 1 µm
range = 0.2 µm to 5 µm
Size: viruses
influenza virus =
range =
influenza virus = 0.1 µm
range = 0.01 µm to 2 µm
How many millimetres are in µm?
µm = a thousandth of a millimetre
Made of cells?: fungi
yes
Made of cells?: protoctista
yes
Made of cells?: bacteria
yes
Made of cells?: viruses
no - they are not alive
How many cells?: fungi
multicellular or unicellular (yeast)
How many cells?: protoctista
most unicellular
How many cells?: bacteria
uni-cellular
How many cells?: viruses
not made of cells
Structure: fungi
cells with cell membrane and cell wall
Structure: protoctista
cells with cell membrane (some with cell wall)
Structure: bacteria
cells with cell membrane and cell wall
Structure: viruses
made of protein coat containing gentic material
no other cellular structure
Nucleus?: fungi
yes
Nucleus?: protoctista
yes
Nucleus?: bacteria
no (circular chromosome in cytoplasm)
Nucleus?: viruses
no (genetic material protein coat)