Answer
Esherichia coli is a bacteria and it has 2 Na+/H+ antiporter genes namely 'nhaA' nad 'nhaB'. Here, nhaA gene is required for adoptation to mantain high salinity and grown at basic pH in presence of Na+. The gene nhaB enhance the telerance to low levels of Na+. So, the gene nhaA is a high pH dependant. If the bacterial extracellular have high pH results excretion of exces Na+ liberated. Hence, the correct option is " Extracellular pH higher"
Work Step by Step
Esherichia coli is a bacteria and it has 2 Na+/H+ antiporter genes namely 'nhaA' nad 'nhaB'. Here, nhaA gene is required for adoptation to mantain high salinity and grown at basic pH in presence of Na+. The gene nhaB enhance the telerance to low levels of Na+. So, the gene nhaA is a high pH dependant. If the bacterial extracellular have high pH results excretion of exces Na+ liberated. Hence, the correct option is " Extracellular pH higher"
