Micro-organisms

Question 1

Bacteria - Staphylococcus Aureus

Answer 1

0.5-5um

Unicellular

Gram Positive

Cell wall

No true membrane bound nucleus

Appear in a cluster like grapes

Question 2

Virus - Parvo Virus

Answer 2

20-300nm

Obligate parasites

Icosahedral shape

Central core of nucleic acid

Contained in a protein coating called a capsid

Capsid made up of subunits called capsomeres

Question 3

Fungi- Microsporum Canis

Answer 3

Colonies of microsporum can grow 3-9cm in a few days

Filamentous fungus

May be Unicellular or Multicellular

Produces hyphae, macroconidia and microconidia

Each hyphae is a tube filled with cytoplasm and has several nuclei

Question 4

Algae - Chlorella Pyrenoidosa

Answer 4

0.5-20um up to kelp

Unicellular or multicellular

Membrane bound nucleus

Chlorella single celled

Thin cell wall lined by cell membrane
> enclosing nucleus cytoplasm chloroplast and starch granule

Question 5

Protozoa - Toxoplasma Gondii

Answer 5

10-20um

Unicellular

No cell wall but membrane bound nucleus

Cell comprised of cytoplasm, food vacuole, mitochondrion and golgi complex