A DNA molecule is a polymer, specifically being a type of polymer known as a polynucleotide. In other words, it is made up of many nucleotides. Each nucleotide is made up of three main parts: one or more phosphate (P) groups, a nitrogenous base (adenine, guanine, cytosine, or thymine), and a deoxyribose (pentose, 5-carbon) sugar. Adenine always binds/hydrogen bonds to thymine, and guanine always to cytosine. (According to Chargaff's rules, the amount of pyrimidines is always equal to that of purines.) Hope this helps! :)
DNA is made up of six smaller Molecules--- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine, and guanine).
Made mostly of collagen, bone is living, growing tissue. Collagen is a protein that provides a soft framework, and calcium phosphate is a mineral that adds strength and hardens the framework. This combination of collagen and calcium makes bone strong and flexible enough to withstand stress.
Sedimentary rocks are formed from pre-existing rocks or pieces of once-living organisms. They form from deposits that accumulate on the Earth's surface.
