What is the main function of the nucleolus? a. it produces cell adhesion proteins that are then exported to the cell membrane. b. it is the site of photosynthesis in photosynthetic cells. c. its function is not yet known. d. it produces enzymes that are then exported to the lysosomes. e. it is the site of ribosome-subunit synthesis?

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.