Statement (I) is correct: Post-mortem accumulation of lactic acid drives muscle pH downward toward the isoelectric point of actomyosin (~5.3–5.5), neutralizing surface net electrical charge and drastically reducing muscle protein water holding capacity (WHC). Statement (II) is completely incorrect: pH is one of the most critical thermodynamic determinants governing protein quaternary structure, net charge, denaturation, and enzymatic activity.