Biology · Microbiology and Microbial Growth
When budding yeast (a facultative anaerobe) is grown in a batch culture medium containing high glucose concentration, it exhibit a diauxic growth pattern characterized by two distinct lag and exponential phases. Which of the following statements best explains this growth pattern?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Yeast cells switch from mitotic to meiotic division due to low glucose and require the second lag phase to prepare for meiosis.
- 2Yeast cells consume glucose in the first exponential phase and switch to consuming sucrose in the second phase.
- 3In the second lag phase, yeast cells switch from glucose fermentation to utilizing non-fermentable carbon sources like ethanol, acclimating to this alternative energy source.✓
- 4During the first lag phase, cells acclimate to glucose, while in the second lag phase, they undergo selective cell death before resistant cells divide again.
Correct answer
In the second lag phase, yeast cells switch from glucose fermentation to utilizing non-fermentable carbon sources like ethanol, acclimating to this alternative energy source.
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