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#Question id: 11397


Which statement about the domain Archaea is false?

#XL - S Microbiology
  1. Genetic prospecting has recently revealed the existence of many previously unknown archean species.
  2. Some archaeans can reduce CO2 to methane.
  3. The genomes of archaeans are unique, containing no genes that originated within bacteria.
  4. Some archaeans can inhabit solutions that are nearly 30% salt

Answer:- Option(s): 3


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#XL - Q Biochemistry

Calculate the percentage of histidine that has its imidazole side chain protonated at pH 7.3. The pKa values for histidine are pK1 = 1.8, pK2 (imidazole) = 6.0, and pK3 = 9.2.

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