The oxygen consumed during cellular respiration is involved directly in which process or event? ; a) glycolysis; b) accepting electrons at the end of the electron transport chain; c) the citric acid cycle; d) the oxidation of pyruvate to acetyl coa; e) the phosphorylation of adp to form atp

It's B) accepting electron at the end of the electron transport chain

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you