Some similarities among all four types of molecules. list as many as you
can.

Biomolecules are the biological molecules that are produced by the cell of a living organism. The four major biomolecules are Protein, nucleic acid, carbohydrate, and lipids.

The similarities among all four types of molecules are as follows:

Thus, the similarities of the four major molecules are mention above.

Learn more about biomolecules:

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Lipids: Carbon, Hydrogen and Oxygen - monomers are glycerol and fatty acids.

Proteins - Carbon, Hydrogen, Oxygen and Nitrogen - monomers are amino acids

Carbs - No Phosphate. Carbon, Hydrogen and Oxygen - H:O ratio is 2:1 - monomers are (may have a ring structure)

Nucleic Acids - Examples are DNA and RNA. Carbon, Hydrogen, Oxygen, Nitrogen and Phosphate - monomers are nucleotide (sugar, phosphate, nitrogen base)

Lipids and proteins contain carbon, hydrogen, and oxygen. Both monomers are from certain types of acids. Carbs also contains carbon, oxygen, and hydrogen like lipids and proteins do. Carbs have monomers. Nucleic acids contain the same things founds in all three major macro molecules. Nucleic acids have nucleotide.

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your answer should be c) enjoy!

they deliver oxygen to the blood