GATE ME 2017 Set 1 — Question 65
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General Aptitude → Quantitative Aptitude → Data Interpretation (Bar, Pie, Graphs, Tables)
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Question
The growth of bacteria (lactobacillus) in milk leads to curd formation. A minimum bacterial population density of 0.8 (in suitable units) is needed to form curd. In the graph below, the population density of lactobacillus in 1 litre of milk is plotted as a function of time, at two different temperatures, and .
Consider the following statements based on the data shown above:
i. The growth in bacterial population stops earlier at as compared to
ii. The time taken for curd formation at is twice the time taken at Which one of the following options is correct?
i. The growth in bacterial population stops earlier at as compared to
ii. The time taken for curd formation at is twice the time taken at Which one of the following options is correct?
Correct answer
(A) Only i
Solution
1.Statement i: The growth stops when the population density reaches a plateau. From the graph, the curve for plateaus around 140-160 minutes, while the curve for plateaus later, around 180-200 minutes. Thus, growth stops earlier at . Statement i is correct.
2.Statement ii: Curd formation occurs at a density of 0.8.
- At , the density reaches 0.8 at minutes.
- At , the density reaches 0.8 at minutes.
Therefore, only statement i is correct.
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