The nucleotide is . a. Made of sugar and phosphate
b. The structural unit of DNA
c. The main component in blood
d. Made of nitrogenous bases

I think it might be A bit I’m not sure hope this helps

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