All living things are made up of four classes of biological macromolecules: carbohydrates, lipids, proteins, and nucleic acids.
macromolecules 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.

all 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.
the monomers of of starch are monosaccharides.

All biomolecules could be called carbon-based molecules. Carbons are CHO Lipids are CHO Proteins are CHON and Nucleic acids are CHONP. All of them contain carbon.

Cell membranes are made in part from phospholipids think about the phospolipid bilayer consisting of hydrophobic tails and hydrophilic heads. This is what regulates what goes in and out of the cell.

The monomers of starch are monosaccharides. Starch is a chain of glucose. Glucose is a carbohydrate specifically a monosaccharide as it is a simple single sugar.

If you have questions about why the others are wrong feel free to ask.

It's the top 2 and the bottom 2

Explanation:

If this is the one on usa test prep than this is what I got

the bedroo..

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.