Before starting a purity plate, you can ensure you have a pure culture if (check all...

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Biology

Before starting a purity plate, you can ensure you have a pureculture if (check all that apply)
A)all the colonies are convex but different colors
B) you use cells from only one colony as an inoculum source
C) the inoculum contained only gram-positive cocci
D) all the colonies are the same color but different size
can someone help me with this

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4.1 Ratings (718 Votes)

A Frequently one finds that it is necessary to leave cultures for more than two days at room temperature in order to see differences in morphology Look for different colonies using a colony magnifier lamp Look for colonies growing within the colony in question different colors sizes colony edges and textures Size pinpoint small medium large Color violet yellow cream gray red green etc Shape Elevation flat raised convex umbonate knob in center concave Margin edge smooth irregular filamentous Consistency wrinkled dull powdery shiny moist mucoid granular compact B Pure culture in microbiology a laboratory culture containing a single species of organism A pure culture is usually See Answer

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