A microbiologist has isolated a new strain of bacteria, and is trying to characterize aspects of its growth. Three flasks of the same media have different amounts of NaCl added. Other growth conditions are identical, and the flasks inoculated at the same time. At regular intervals over a 3 hour period, culture samples are taken and turbidity is measured. Here are the absorbance values over time in a table and graphed. Absorbance (OD600) Time (min) 20% NaCl 3% NaCl 0% NaCl 0 0.05 0.05 0.05 30 0.06 0.05 0.05 60 0.075 0.06 0.05 90 0.11 0.07 0.049 120 0.25 0.1 0.048 150 0.5 0.105 0.055 180 0.7 0.11 0.055 210 0.99 0.15 0.06 240 1.22 0.18 0.055 270 1.35 0.19 0.06 300 1.5 0.2 0.06 330 1.6 0.25 0.062 360 1.7 0.3 0.06 Based on these data, which of the following can be determined about this bacterium? It is psychrophilic. It is halophilic. It is piezophilic/barophilic. It is acidophilic. It is alkaliphilic. It is NOT halotolerant/NOT halophilic.

Curren'S Math For Meds: Dosages & Sol
11th Edition
ISBN:9781305143531
Author:CURREN
Publisher:CURREN
Chapter10: Reconstitution Of Powdered Drugs
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  1. A microbiologist has isolated a new strain of bacteria, and is trying to characterize aspects of its growth. Three flasks of the same media have different amounts of NaCl added. Other growth conditions are  identical, and the flasks inoculated at the same time. At regular intervals over a 3 hour period, culture samples are taken and turbidity is measured. Here are the absorbance values over time in a table and graphed.

     

    Absorbance (OD600)

    Time (min)

    20% NaCl

    3% NaCl

    0% NaCl

    0

    0.05

    0.05

    0.05

    30

    0.06

    0.05

    0.05

    60

    0.075

    0.06

    0.05

    90

    0.11

    0.07

    0.049

    120

    0.25

    0.1

    0.048

    150

    0.5

    0.105

    0.055

    180

    0.7

    0.11

    0.055

    210

    0.99

    0.15

    0.06

    240

    1.22

    0.18

    0.055

    270

    1.35

    0.19

    0.06

    300

    1.5

    0.2

    0.06

    330

    1.6

    0.25

    0.062

    360

    1.7

    0.3

    0.06

    Based on these data, which of the following can be determined about this bacterium?
       

    It is psychrophilic.

       

    It is halophilic.

       

    It is piezophilic/barophilic.

       

    It is acidophilic.

       

    It is alkaliphilic.

       

    It is NOT halotolerant/NOT halophilic.

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