Most living organisms cannot survive at temperature above 4…

Biology Organisms and Populations Single Correct MCQ

Published on: August 21, 2026

Most living organisms cannot survive at temperature above 45°C. How are some microbes able to live in habitats with temperature exceeding 100°C?

Occurrence of branched chains of lipids reducing fluidity of cell membrane

Reduction in amount of free water

Development of heat tolerant enzymes

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Text Solution

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The correct answer is:

Microbes living at extremely high temperatures (thermophiles) survive because of several adaptations:

• Branched lipid chains make cell membranes more stable.

• Less free water helps prevent damage at high temperatures.

• Heat-tolerant enzymes remain functional even above 100°C.

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