LIFE SCIENCE

OBJECTIVE LIFE SCIENCE

BIOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The following are cations, except:
A
bicarbonate
B
potassium
C
iron
D
magnesium,
Explanation: 

Detailed explanation-1: -Bicarbonate is an anion (a negatively-charged ion). Its chemical formula is HCO3−. It reacts with acids to produce carbon dioxide. A sample compound is sodium bicarbonate.

Detailed explanation-2: -Bicarbonate is one of the major anions in mammalian tissues and extracellular fluids. Along with accompanying H+, HCO3-is generated from CO2 and H2O, either spontaneously or via the catalytic activity of carbonic anhydrase.

Detailed explanation-3: -The alkali metals are highly electropositive, these are the only elements which form stable solid bicarbonates. However lithium due to its less electropositive nature, does not form solid bicarbonate.

Detailed explanation-4: -Bicarbonate, also known as hydrogen carbonate, is responsible for maintaining the balance of acids and bases in your body, i.e. the pH value. It is a base or alkaline, therefore an important “opponent” of acids.

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