How would you describe a bacterial colony?
A bacterial colony is what you call a group of bacteria derived from the same mother cell. This means that a single mother cell reproduces to make a group of genetically identical cells, and this group of cells form a mass, which is known as a bacterial colony.
What are the different types of bacterial colonies?
The Figure below shows four of the common and characteristic shapes of bacteria: cocci (spherical), rods, vibrio (comma shaped) and spiral. Cocci. The organism shown (top left) is Micrococcus luteus, which forms tetrads due to regular alternation of the plane of cell division.
Why do bacterial colonies look different?
Bacteria grow tremendously fast when supplied with an abundance of nutrients. Different types of bacteria will produce different-looking colonies, some colonies may be colored, some colonies are circular in shape, and others are irregular.
How would you describe colonies on agar plate?
A colony is defined as a visible mass of microorganisms all originating from a single mother cell, therefore a colony constitutes a clone of bacteria all genetically alike. In the above picture of a mixed culture, an agar plate that has been exposed to the air and many different colony morphologies can be identified.
What is the most common bacterial colony form?
Form of the bacterial colony: – The form refers to the shape of the colony. These forms represent the most common colony shapes you are likely to encounter. e.g. circular, irregular, filamentous, rhizoid, etc.
How do you describe bacteria?
Bacteria are single-celled microorganisms with prokaryotic cells, which are single cells that do not have organelles or a true nucleus and are less complex than eukaryotic cells. Bacteria are extremely numerous, and the total biomass of bacteria on Earth is more than all plants and animals combined.
How can you tell the difference between a fungal and bacterial colony?
The main difference between bacterial and fungal colonies is that bacterial colonies are small, smooth or rough colonies with defined margins while fungal colonies are large colonies with a fuzzy appearance. Furthermore, bacterial colonies look wet and shiny while fungal colonies are powder-like.
What is the most common bacterial colony margin?
Margin of bacterial colony: The margin or edge of a colony may be an important characteristic in identifying organisms. Common examples are entire (smooth), irregular, undulate (wavy), lobate, curled, filiform, etc. Colonies that are irregular in shape and/or have irregular margins are likely to be motile organisms.
How do you choose bacterial colonies?
A suitable colony grown on an agar plate is isolated for picking. The colony is isolated with a colony-picking tool such as a toothpick, inoculation loop, or pipette tip. It is then inoculated in a solid or liquid cell culture medium where it is incubated overnight to encourage replication.
What is the difference between bacterial infection and fungal infection?
What causes each infection, and who’s at risk? Simply put, a yeast infection is fungal in nature, whereas BV is bacterial. An overgrowth of Candida fungus causes yeast infections.
A. 1. Raised (yellow) 2. Flat (cream colony in front of yellow colony) Describe the elevation represented in this colony. Describe the elevation represented in this colony.
What does a circular colony of bacteria look like?
Bacteria. Each distinct circular colony should represent an individual bacterial cell or group that has divided repeatedly. Being kept in one place, the resulting cells have accumulated to form a visible patch. Most bacterial colonies appear white, cream, or yellow in color, and fairly circular in shape.
How are bacteria different from other types of bacteria?
Interpreting Plates. Bacteria grow tremendously fast when supplied with an abundance of nutrients. Different types of bacteria will produce different-looking colonies, some colonies may be colored, some colonies are circular in shape, and others are irregular.
How are colony morphologies used to identify bacteria?
Features of the colonies may help to pinpoint the identity of the bacterium. Different species of bacteria can produce very different colonies. In the above picture of a mixed culture, an agar plate that has been exposed to the air and many different colony morphologies can be identified.
