Question:
The growth pattern that you will obtain for a media containing two different carbon sources one of which is preferentially utilized will be a:
The growth pattern that you will obtain for a media containing two different carbon sources one of which is preferentially utilized will be a:
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Diauxic Growth = Two Sugars + Sequential Utilization + Two Growth Phases.
Updated On: May 14, 2026
- diauxic growth.
- exponential growth.
- linear growth.
- lag phase followed by log phase growth.
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The Correct Option is A
Solution and Explanation
Step 1: Concept
Diauxic growth occurs when a microorganism is grown in a medium with two sugars, and it utilizes them one after the other.
Step 2: Meaning
The cell first uses the sugar that allows for the fastest growth rate (usually glucose).
Step 3: Analysis
Once the preferred sugar is exhausted, the cell undergoes a second lag phase to synthesize the enzymes needed for the second sugar. This results in two distinct exponential growth phases separated by a short plateau.
Step 4: Conclusion
The "double-growth" curve resulting from sequential substrate utilization is called diauxic growth. Final Answer: (A)
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