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Proteins
They are lipids.
Nucleic Acids
Proteins
Protein
Lactose is not a macromolecule. It is a disaccharide, that is one molecule of lactose is formed by the elimination of water between two simple sugar molecules, in this case galactose and glucose. Lactose can be made to link up into medium chain molecules, but this is a fairly random process and produces a mixture of products which are not digestible.
Proteins.
DNA and RNA are made up of nucleic acids.
Protein(s), of course.
Cement send of ratio 1:5 for brick work
Water - H2O - is made of hydrogen and oxygen in a ratio of 2:1.
lipids