MIRCOBIOLOGY LAB PRACTICAL 1 5-8

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11 Terms

1
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GRAM-POSITIVE BACTERIA

A THICK PEPTIDOGLYCAN LAYER GRAM STAINS PURPLE

2
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GRAM-NEGATIVE BACTERIA

HAS A THIN PEPTIDOGLYCAN LAYER GRAM STAIN PINK

3
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TURBIDIMETERY

IS A COMMONLY USED METHOD FOR ENUMERATING BACTERIA OR DETERMINING THE GROWTH PHASE OF AN ACTIVELY GROWTH CULTURE USING A SPECTROPHOTOMETER

4
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PSYCHROPHILES

ORGANISMS THAT GROWN OPTIMALLY BELOW 15 C

5
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MESOPHILES

PEFER TEMPERATURES BETWEEN 15 - 45 C

6
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THERMOPHILES

GROW AT TEMPERATURES ABOVE 45 C

7
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CATALASE

AN ENZYME THAT HELPS PROTECT BACTERIA FROM HYDROGEN PEROXIDE BY BREAKING IT DOWN TO FORM OXYGEN GAS AND WATER

8
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CATALASE POSITIVE

QUICK APPEARANCE OF BUBBLING

9
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CATALASE NEGATIVE

NO BUBBLES

10
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OXIDASE POSITIVE

PURPLE COLOR (PRESENT CYTOCHROME OXIDASE)

11
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OXIDASE NEGATIVE

NO COLOR CHANGE