Methods in Microbiology [GATE (Graduate Aptitude Test in Engineering) Microbiology]: Questions 13 - 16 of 18

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Question 13

Methods in Microbiology
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Appeared in Year: 2017

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Assume that the average DNA content of a single microbial cell is 4 femtogram. A soil sample analyzed for its microbial community DNA is found to contain 0.32μg DNA per gram of the soil. The number of microbial cells per milligram of the soil is ________.

Question 14

Methods in Microbiology

Appeared in Year: 2018

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The following stoichiometric equation represents the conversion of glucose to lactic acid in a cell:

If the free energy of conversion of glucose to lactic acid only is , the efficiency of energy transfer is ________ % (up to 1 decimal point) .

Question 15

Methods in Microbiology
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Appeared in Year: 2020

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A 100µl aliquot (10 - 4) dilution of the bacterial culture plated on the nutrient agar gave 4 colonies. The bacterial stock concentration (in million cell/ml, rounded off to one decimal place) is________.

Question 16

Methods in Microbiology

Appeared in Year: 2018

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The initial concentration of cells (N0) growing unrestricted in a culture is . If the specific growth rate of the cells is , the time required for the cell concentration to become is ________ hours (up to 2 decimal points) .

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