Archaebacteria in Extreme Habitats — NEET Biology
✅ Asked in NEET 2017Which of the following are found in extreme saline conditions? NEET 2017
Which of the following are found in extreme saline conditions? NEET 2017
Answer & NCERT explanation
Correct answer: D — Archaebacteria
Archaebacteria are extremophiles that thrive in harsh environments including high salinity conditions like salt lakes. They have unique cell wall composition and membrane lipids that help them survive extreme conditions. Eubacteria, cyanobacteria, and mycobacteria cannot tolerate such extreme saline environments as they lack specialized adaptations.
Read more NCERT concept on the PYQ
These bacteria are special since they live in some of the most harsh habitats such as extreme salty areas (halophiles), hot springs (thermoacidophiles) and marshy areas (methanogens). Archaebacteria differ from other bacteria in having a different cell wall structure and this feature is responsible for their survival in extreme conditions. Methanogens are present in the gut of several ruminant animals such as cows and buffaloes and they are responsible for the production of methane (biogas) from the dung of these animals.
Archaebacteria are organisms that survive in extreme environments like salt lakes (halophiles), hot springs (thermoacidophiles), and swamps (methanogens). Their unique cell wall structure, different from regular bacteria, allows them to withstand these harsh conditions. Students often confuse archaebacteria with eubacteria or forget that halophiles specifically require high salt concentrations to survive—they cannot live in normal environments. Remember: halophiles = salt-loving, thermoacidophiles = heat and acid-loving, methanogens = produce methane in animal guts. NTA tests this because it's a high-yield classification concept requiring understanding of both structure and ecological adaptation.
What does NCERT say about These bacteria are special?
Has this concept appeared in NEET?
Which chapter is this from?
Through deep analysis of NEET and NTA, 88 of 90 questions from the NEET 2026 paper were matched straight from the MedicNEET Biology question bank.
88/90MedicNEET's Biology question bank is built from the same NCERT lines NTA picks repeatedly. Not random MCQs — questions crafted exactly like NTA crafts them.