Bacterial Morphology Virtual Lab Questions (1) copy

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Mesa Community College *

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Apr 3, 2024

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1 Bacterial Morphology Virtual Lab Answer Sheet Post lab questions 1. Define the following terms: Morphology: Morphology is the study of the form and structure of microorganisms. Some such as bacteria, fungi, and viruses, this includes characteristics like shape, size, as well as arrangements of cells. Colony: Colony refers to a visible cluster of microorganisms, this may be bacteria, and fungi. Clusters that grow from a single progenitor cell. This helps classify and identify the microorganism . 2. What is the relationship between the terms that you defined in question 1? The relationship between Morphology and Colony is that morphology refers to the form and structure. The morphology of an organism contributes to the overall appearance and characteristics of the colony. 3. Identify the following bacterial shapes and arrangements: Photomicrograph Bacterial Shape Cellular Arrangement Chain Streptobacillus Cluster Staphylococcus Cube-shaped Sarccina Chain Streptococcus ©2016 Carolina Biological Supply Company

2 4. Which one of the three major bacterial cell shapes is NOT shown in question 3? The one bacterial shape that is not shown in question 3 is Spiral. 5. List and define the three morphological characteristics commonly used to describe colonies. The three morphological characteristics commonly used to describe colonies are size, shape and texture. ©2016 Carolina Biological Supply Company

3 6. Which of the following terms would NOT be used to describe a colony’s margin? (Choose one or more.) What aspect(s) of colony morphology would this term/these terms be used to describe? The following term that would not be used to describe a colony’s margin is Lobate, lobate. The terms are used to describe different characteristics. Erose: describes a colony with irregular eroded-looking margins, often appearing jagged or uneven. Umbonate: colony with raised convex, center and sloping edges, like a button or a dome. Curled: indicates a colony with edges that are curled or rolled. Pulvinate: colony with cushion like or pillow like appearance, raised or convex. Lobate: colony with distinct lobes or projections extending from the main body. Entire: colony with a smooth even margin, lacking lacking irregularities or indentations. Filiform: colony with thread like projections extending outward from the center. Undulate: colony with wavy or undulating margins, often slight regular indentations. Rhizoid: colony with root like projections or extensions spreading out from the main body. ©2016 Carolina Biological Supply Company

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