Question

A few organisms are known to grow And multiply at a temperature of $100-{105}^{\circ }C$ they belong to

• A. Thermophilic sulphur bacteria
• B. hot spring blue green agae
• C. methanogenic archaebacteria
• D. Marine archaebacteria

Answer 1

The correct option is A Thermophilic sulphur bacteria

Thermophilic sulphur bacteria can survive at high temperatures between 41 and 122${}^o$C and an optimum growth temperature which is higher than 75${}^o$C. Hot spring blue-green algae have an optimum growth temperature of 45${}^o$C. Methanogenic archaebacterium grows at an optimum temperature of 35-40${}^o$C. Some marine archaebacteria are extreme thermophiles and grow at temperatures of 65- 80${}^o$C.

So, the correct answer is 'Thermophilic sulpher bacteria'.