Could you distingusih between colonies of bacteria, yeast and moulds? How?

Depends on the equipment you have. yeast are eukaryotic, therefore will have a nucleus, which is absent in the bacteria as they are prokaryotes. A good light microscope would enable you to see this. Moulds also being part of the fungi, could be distinguished using the same method, it would also contain a nucleus. I guess the problem lies distinguishing between the yeast and the moulds. I personally would go and look at the differences in structure between yeast and moulds in a text book, then try and spot them under the microscope again. Alternatively try growing them in different mediums as some mediums will only support certain types of organism on them. So in order to distinguish which one you have, look at the primary respiratory substrate which each organism uses, then plate them out on their primary substrate and look for growth.

Could you distingusih between colonies of bacteria, yeast and moulds? How?
Bacteria tend to have a smooth surface, and are glossy. Moulds tend to be "hairy". Yeasts often have a different coloured ring around the edge.
Reply:its whats silverbirch is saying. under a microscope their size varies also
Reply:Often it depends on what you grow them on. Certain media will only grow one or the other. Often this will give different appearances to them.
Reply:Yeasts and Moulds are both common names for types of Fungi, being included in the domain Eucarya they have a cell nucleus unlike all bacteria so finding out what something was would be easy if you get out an average light microscope and take a sample.
Reply:Actually Fungi belong to...well Fungi. Yeasts are eukaryotic organisms. Bacteria are prokaryotes. Other groups include proctists and some other stuff, archae or summit.





Fundamental microscopic examination of each sample should reveal the identity of the organism into these broad classes at the very least. However many bacteria have a yeast like growth pattern so genetic or phenotypic studies would be required to further differentiate and class these organisms.