The answer would be a. Energy stored in chemical bonds :)
Macromolecules are large molecules within your body that serve essential physiological functions<span>. Encompassing </span>carbohydrates<span>, </span>proteins, lipids and nucleic acids<span>, macromolecules exhibit a number of similarities.
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We are wearing masks so we are breathing in CO2 which is not good for us. We are meant to breathe in oxygen and breathe out co2
This question is pretty vague and confusing.
