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WorksheetsCOLONY MORPHOLOGY & CHARACTERISTICS OF CULTURE
Total questions: 27
Worksheet time: 16mins
A colony is defined as a
visible mass of microorganisms, all originating from a single mother cell
visible mass of microorganisms, all originating from a single two cells
a colony consist of clone of cells genetically alike.
True
False
Colonies are described on the basis
-pigmentation
-effect on growth medium
size
shape
texture
elevation
smell
The identification of the cultural characteristics of a bacterium on agar plate is
colony morphology
COLONY ODOUR
tudy of colony morphology can be very useful in
distinguishing microorganism from each other
finding treatments
How are Colonies characterized?
COLONY SHAPE
COLONY SIZE
COLONY COLOUR/PIGMENTATION
PPEARANCE OF COLONY SURFACE
COLONY DEPTH
How are Colonies characterized?
COLONY ODOUR
OPACITY
CONSISTENCY/TEXTURE
COLONY TASTE
What does colony shape consist of?
FORM
ELEVATION
MARGIN
COLOR
Refers to the shape of the colony. The most common shapes are circular, irregular, filamentous, rhizoid, punctiform, spindle etc.
Form of colony
Elevation of colony
Margin of colony
Size of colony
The side view of a colony. The most common are flat, raised, umbonate, crateriform, convex, pulvinate.
Form of colony
Elevation of colony
Margin of colony
Size of colony
This refers to how the edge of each colony is seen. Some are entire/smooth, irregular, undulate/wavy, lobate, curled, filamentous etc.
Form of colony
Elevation of colony
Margin of colony
Size of colony
The diameter of a colony may be measured in
millimeters
Liter
Feet
Centimeters
Size of colony:
Described in relative terms such as
pinpoint
small
medium
large
x-large
Colonies are frequently
shiny
smooth
dull
rough
wrinkled
produce an earthy odour which is experienced after a rain.
actinomycetes
fungi
E. coli
Vibrio cholera
produce fruity smell
actinomycetes
fungi
E. coli
Vibrio cholera
foul smelling odours
actinomycetes
fungi
E. coli
Vibrio cholera
The opacity of microbial colony can be
Transparent (clear)
Translucent (almost clear with distorted vision)
Opaque (not clear)
iridescent (mulit-color)
The opacity of microbial colony can be:
Transparent
Clear
Almost clear with distorted vision
Not clear
The opacity of microbial colony can be:
Translucent
Clear
Almost clear with distorted vision
Not clear
The opacity of microbial colony can be:
Opaque
Clear
Almost clear with distorted vision
Not clear
Consistency/texture of colony:
buttery
butyrous
viscid
brittle
mucoid
Consistency/texture of colony:
sticky
butyrous
viscid
brittle
mucoid
Consistency/texture of colony:
dry/breakable
butyrous
viscid
brittle
mucoid
Consistency/texture of colony:
mucoid
butyrous
viscid
brittle
mucus like
Non-pigmented
Cream
Tan
White
Purple
Pigmented
Yellow
Red
White
Purple
