Examlex
Which of the following is NOT a component of DNA?
pH
A scale used to specify the acidity or basicity of an aqueous solution, ranging from 0 to 14.
[HCO3-]
[HCO3-] is the chemical notation for the bicarbonate ion, a key intermediate in the carbon dioxide transport and pH balance mechanisms in living organisms.
pH
A measure of the hydrogen ion concentration in a solution, indicating its acidity or alkalinity on a scale where 7 is neutral, lower values are acidic, and higher values are basic.
K
Potassium, an essential dietary mineral and elemental metal with the atomic symbol 'K', crucial for nerve function and muscle contraction.
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