Singapore GCE A-Level H1 Biology Practice Questions - Singapore GCE A-Level H1 Biology Examination (SEAB Syllabus 8876) Exam

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Lysosomes contain a variety of hydrolytic enzymes. What optimal intra-organellar environment allows these enzymes to function efficiently while safeguarding the rest of the cell?

Acidic pH maintained by H+ ATPase proton pumps Basic pH maintained by Na+/K+ ATPases Neutral pH buffered by bicarbonate ions High calcium ion concentration maintained by Ca2+ pumps

Correct Answer:

Acidic pH maintained by H+ ATPase proton pumps

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