Question

The ideal temperature for growth of yeast is

• A. 10-15°C
• B. 15-20°C
• C. 25-27°C
• D. 30-32°C

Hint:

Optimum growth for Saccharomyces cerevisiae occurs at $25\text{--}27^\circ\text{C}$; temperatures above $38\text{--}40^\circ\text{C}$ cause thermal arrest and cell death.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Microbial cell proliferation and metabolic kinetics depend strongly on ambient incubation temperature.

Step 2: Detailed Explanation:
Most industrial food and brewing yeasts (such as mesophilic Saccharomyces cerevisiae) display an optimal growth temperature range of $25\text{--}27^\circ\text{C}$ (or $25\text{--}30^\circ\text{C}$).
At this temperature range, cell division rate, metabolic enzyme efficiency, and biomass yield are maximized while minimizing thermal stress.

Step 3: Final Answer:
Hence, the ideal temperature for growth of yeast is 25-27°C.