Without enzyme, biological reaction essential to life takes 2.3 billion years

Without enzyme, biological reaction essential to life takes 2.3 billion years from PhysOrg.com All biological reactions within human cells depend on enzymes. Their power as catalysts enables biological reactions to occur usually in milliseconds. But how slowly would these reactions proceed spontaneously, in the absence of enzymes – minutes, hours, days? And why even pose the question?[...]

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