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All living things are made up of four classes of biological macromolecules carbohydrates, lipids, proteins, and nucleic acidsMacromolecules are large molecules composed of thousands of covalently connected atoms, also called polymers. A polymer is a long molecule consisting of many similar building blocks, the small building-block molecules are called monomers All cells have thousands of different macromolecules, that vary among cells of an organism, vary more within a species, and vary even more between species. A huge variety of polymers can be built from a small set of monomers What statements are true about the biological macromolecules. (Choose 3) 00000All biomolecules could be called carbon -based molecules The monomers of DNA are nucleotides Ready cellular energy comes in the form of lipids. Carbohydrates contain nitrogen and therefore differ from the other macromolecules Cell membranes are made, in part , from phospholipids

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Based on the information provided and general knowledge about biological macromolecules, here are the three true statements:

  1. All biomolecules could be called carbon-based molecules. - This is true because all biological macromolecules contain carbon as a fundamental component.

  2. The monomers of DNA are nucleotides. - This is also true as nucleotides are the building blocks (monomers) that make up nucleic acids like DNA.

  3. Cell membranes are made, in part, from phospholipids. - This statement is true because phospholipids are essential components of cell membranes, forming a bilayer that provides structure and regulates what enters and exits the cell.

The other statements are false:

  • "Ready cellular energy comes in the form of lipids." - This is misleading; readily usable cellular energy typically comes from carbohydrates (like glucose), rather than lipids.

  • "Carbohydrates contain nitrogen and therefore differ from the other macromolecules." - This statement is false; carbohydrates do not typically contain nitrogen. They are primarily composed of carbon, hydrogen, and oxygen.