This picture shows normal blood cells, which are round, and sickle cells, which appear much longer. people with sickle cells suffer from sickle cell anemia, which is an inherited disease. it is caused by a change in a gene responsible for production of hemoglobin. this type of change is known as a(n) a) cancer. b) genotype. c) mutation. d) acquired characteristic.

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.