ATP is not produced directly by the ETC but instead via the proton gradient generated during electron transport through the ETC.
Fats/Lipids: three fatty acids and a glycerol molecule
Nucleic acids: nucleotides
proteins: amino acids
carbohydrates: monosaccharides, dissaccharides, polysaccharides
B,they are specialized,all of these cells do different things for the organism,so it will survive and be able to fight against viruses and other bacterial sources.