NAPLEX Practice Exam 2026 – All-in-One Guide to Mastering the North American Pharmacist Licensure Examination!

Adenosine is a chemical compound that plays an important role in various biological processes. The half-life of a compound refers to the time it takes for half of the initial amount of the compound to decay. In the case of Adenosine, its half-life is less than 10 seconds, meaning that within 10 seconds, half of the initial amount of Adenosine will decay. This is a very short half-life compared to the other options, which may seem like plausible answers but are actually much longer than the true half-life of Adenosine. Option B, 30 seconds, is three times the true half-life. Option C, 1 minute, is six times the true half-life. And option D, 5 minutes, is thirty times the true half-life of Adenosine. Therefore, A is the correct answer as it accurately reflects the short half-life of Adenosine.