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#Question id: 8717


Molecular clocks are more reliable when ________.

#XL - S Microbiology
  1. the surrounding pH is close to 7.0
  2. most mutations of highly conserved DNA sequences should have no functional effect
  3. the DNA codes for amino acid sequences whose side groups (or R groups) have a neutral pH
  4. a significant proportion of mutations are not acted upon by natural selection

Answer:- Option(s): 4


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