Lesson 8 Nucleic Acids Objectives Lesson 8 Identify

Lesson 8 Nucleic Acids

Objectives Lesson 8 Identify the components of a nucleotide. n Compare the sugars: ribose and deoxyribose. n Identify the five nitrogen bases. n Compare the structure and function of deoxyribonucleic acid (DNA), ribonucleic acid (RNA), and adenosine triphosphate (ATP) molecules. n

Nucleic Acid Structure · Monomer - Nucleotide · Nucleotide parts: · · Nitrogen base · Sugar · Phosphate group Nucleoside: Nitrogen base and Sugar · Adenosine: Adenine + Ribose

Nitrogen Bases · Nitrogen bases: · Bases in DNA: A, T, C, and G · Bases in RNA: A, U, C, and G · Base in ATP: A

Purines • 2 ringed structure • Adenine and Guanine Pyrimidines • 1 ring structure • Thymine, Uracil, and Cytosine

Phosphate groups in Nucleic Acids · DNA and RNA: 1 phosphate group/nucleotide · ATP: 3 phosphate (Adenosine Triphosphate)

Sugars · Sugars in nucleic acids: · Ribose for Ribonucleic Acid and Adenosine Triphosphate (RNA and ATP) · · 5 carbon (pentose) sugar Deoxyribose in Deoxyribonucleic acid (DNA) · 5 carbon sugar (lacking an oxygen, but otherwise exactly the same as ribose)

Function of Nucleic Acids · DNA - contains the "blueprint for life" · RNA - transfers that information to the organelles of the cell to make proteins · ATP - provides the "energy for life" - it is "spendable" energy - just the right amount for cellular functions