Summary
Organisms thriving in extremes of heat, acidity, salt or pressure, with specialised enzymes.
In depth
Thermophiles (above 45 °C) and hyperthermophiles (up to 122 °C), psychrophiles (cold), acidophiles, alkaliphiles, halophiles and piezophiles (pressure). Adaptations include stable proteins, special lipids and DNA-protecting proteins.
Extremophile enzymes (extremozymes) are used in industry. Thermophiles' proteins have extra salt bridges. Halophiles accumulate salt or compatible solutes.
Key idea: life exists in nearly all conditions on Earth.
Frequently asked questions
What is Extremophiles?
Organisms thriving in extremes of heat, acidity, salt or pressure, with specialised enzymes.
Which area of biology covers Extremophiles, and how advanced is it?
Extremophiles is one of the 54 topics in Microbiology. It is rated Advanced, so it suits learners who want specialist depth. Related topics in this area include Archaea, Endospores, Thermophilic Enzymes.
Can you give an example of Extremophiles?
Deinococcus radiodurans withstands thousands of grays of radiation.
What should I learn before Extremophiles?
Work through the Beginner topics in Microbiology first, such as Microorganisms, Bacteria, Archaea, then return to Extremophiles. Advanced topics assume the Intermediate vocabulary.
What topics are related to Extremophiles?
The closest topics to Extremophiles are Archaea, Endospores, Thermophilic Enzymes, Metagenomics. Comparing them side by side is a good way to see how the ideas connect.
How can I check that I understand Extremophiles?
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Extremophiles. To practise the whole of Microbiology, use the Microbiology quiz.
How is Extremophiles different from Archaea?
Extremophiles: Organisms thriving in extremes of heat, acidity, salt or pressure, with specialised enzymes. Archaea: Prokaryotes distinct from bacteria, often thriving in extreme environments like hot springs and salt lakes. Read both side by side and note what each one explains.
How should I study Extremophiles step by step?
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Archaea and explain the difference aloud. Finally, take the Microbiology quiz and come back to this page for any question you miss.