2. Please look up an obligate acidophile, alkaliphile, halophile, and thermophile not covered in this set of questions. Give the species name and where they are found in the world.

Representatives of required extremophile groups are given below.

Obligate acidophile:
Sulfobacillus acidophilus - the pH range for growth is 1.6 - 2.3 with an optimum at 1.8; these bacteria grow mixotrophically by oxidizing ferrous iron, sulfur, and mineral sulfides in the presence of yeast extract or other organic compounds; they are usually found in hydrothermal vents in the Pacific Ocean.
Anderson I. et al. 2012. Complete genome sequence of the moderately thermophilic mineral-sulfide-oxidizing firmicute Sulfobacillus acidophilus type strain (NALT ). Standards in Genomic Sciences 6: 293-303.

Obligate alkaliphile:
Methanosalsus zhilinaeae - the pH range for growth is 8 - 10 with optimum for methanogenesis between 8.5 and 9.5; they are found the soda lake Magadi in Kenya.
Kevbrin, V. V., A. M. Lysenko, and T. N. Zhilina. 1997. Physiology of the alkaliphilic methanogen Z-7936, a new strain of Methanosalsus zhilinaeae isolated from Lake Magadi. Microbiology 66: 261â€“266

Obligate halophile:
Haloarcula amylolytica - extremely halophilic archaeon, grows in presence of 2.9 â€“ 3.2 M NaCl; isolated from Aibi salt lake in Xin-Jiang, China.
Yang Y, Cui HL, Zhou PJ, Liu SJ. 2007. Haloarcula amylolytica sp. nov., an extremely halophilic archaeon isolated from Aibi salt lake in Xin-Jiang, China. International Journal of Systematic and Evolutionary Microbiology 57(1): 103-6.

Obligate thermophile:
Geobacillus stearothermophilus - can live in the temperature range from 30 to 75Â°C; this bacteria is widely distributed in soil, hot springs and ocean sediment in different parts of the world.
Coorevits A, Dinsdale AE, Halket G, Lebbe L, De Vos P, Van Landschoot A, Logan NA. 2012. Taxonomic revision of the genus Geobacillus: emendation of Geobacillus, G. stearothermophilus, G. jurassicus, G. toebii, G. thermodenitrificans and G. thermoglucosidans (nom. corrig., formerly 'thermoglucosidasius'); transfer of Bacillus thermantarcticus to the genus as G. thermantarcticus comb. nov.; proposal of Caldibacillus debilis gen. nov., comb. nov.; transfer of G. tepidamans to Anoxybacillus as A. tepidamans comb. nov.; and proposal of Anoxybacillus caldiproteolyticus sp. nov. International Journal of Systematic and Evolutionary Microbiology. 62 (7): 1470â€“85

Assignment: As you are learning about bacterial cell structure, gro...