Which risk increases as antibiotic efflux pump expression rises due to a regulatory gene mutation in a bacterial biofilm?

💡 Explanation

As efflux pump expression increases due to the mutation, bacteria can expel antibiotics more efficiently, leading to higher antibiotic resistance. Because the mutation facilitates antibiotic expulsion, rather than reducing metabolism or affecting immune responses, it directly elevates resistance. Therefore, the correct answer is increased antibiotic resistance.

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