Which among the following are true about hyperthermophile microbes?

1. The preferred temperature for growth of such microbes is around 45 °C
2. They prefer to grow and reproduce at over 80 °C
3. They normally grow in deep sea floors
4. Below 60 °C they find it too cold and stop growing

Select the correct answer using the code given below:

[amp_mcq option1=”1 and 3″ option2=”2 and 3 only” option3=”2 and 4 only” option4=”2, 3 and 4″ correct=”option4″]

This question was previously asked in

UPSC Geoscientist – 2021

Statements 2 and 3 are true about hyperthermophile microbes. Hyperthermophiles are extremophiles that thrive at very high temperatures, typically optimally above 80 °C, and are commonly found in environments like deep-sea hydrothermal vents.

Hyperthermophiles represent the upper temperature boundary for life as we know it. Their enzymes and cellular structures are specially adapted to withstand denaturation at extremely high temperatures.

Statement 1 is incorrect; preferred temperature around 45 °C describes mesophiles. Statement 4 is incorrect; while they prefer temperatures above 80 °C, their minimum growth temperature is typically above 60 °C, but saying they “stop growing” below 60 °C might not be universally true for all species within this group, and some might exhibit very slow growth in the range of 60-80°C. Deep sea floors, specifically hydrothermal vents, and hot springs are typical habitats.

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