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The Pap test for cervical cancer involves microscopic examination of cervical cells for cancerous cells. A new, rapid diagnostic test to detect human papilloma virus (HPV) DNA before cancer develops is done without microscopic exam. The steps involved in this FastHPV test are listed below. What is the second step?
pH
A scale measuring the acidity or alkalinity of a solution, where 7 is neutral, values below 7 are acidic, and values above 7 are alkaline.
Buffers
Substances that minimize changes in the pH of a solution by absorbing or releasing hydrogen ions.
pH
A logarithmic scale used to specify the acidity or basicity of an aqueous solution, ranging from 0 (very acidic) to 14 (very basic) with 7 being neutral.
Hydrogen Ions
Positively charged ions (H+) that contribute to acidity or alkalinity of solutions and play critical roles in many biological processes.
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