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Nucleotides are little components that make up DNA, and they are connected by phosphate molecules. Learn about the components of nucleotides, which includes phosphate groups, sugar molecules and nitrogen bases, with information from a science teacher in this free video on physiology and the human body.
Expert: Janice Creneti
Bio: Janice Creneti has a BS in secondary science education and a BA in biology from Boston University.
Filmmaker: Christopher Rokosz