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Now let’s consider the structure of the two types of nucleic acids, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The building blocks of DNA are nucleotides, which are made up of three parts: a deoxyribose (5-carbon sugar), a phosphate group, and a nitrogenous base ( Figure 9.3 ).
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Deoxyribose differs from ribose (found in RNA) in that the #2 carbon lacks a hydroxyl group (hence the prefix “Deoxy”). This missing hydroxyl group plays a role in the three-dimensional structure and chemical stability of DNA polymers. Nucleotides in DNA contain four different nitrogenous bases: Thymine, Cytosine, Adenine, or Guanine. Sep 05, 2017 · fits their learning objectives and their students’ needs. Teachers are encouraged to modify the quiz (e.g. only ask some of the questions, explain complicated vocabulary for ELL students) as needed. QUIZ QUESTIONS AND ANSWERS 1. (Key Concept F) In the 1950s when Watson and Crick were working on their model of DNA, many scientists DNA , abbreviation of deoxyribonucleic acid , organic chemical of complex molecular structure that is found in all prokaryotic and eukaryotic cells and in many viruses . DNA is a key part of reproduction in which genetic heredity occurs through the passing down of DNA from parent or parents to offspring.
Chapter 11 - DNA and Genes Chapter 12 - Patterns of Heredity and Human Genetics Chapter 13 - Genetic Technology Unit 5: Change Through Time Chapter 14 - The History of Life Chapter 15 - The Theory of Evolution Chapter 16 - Primate Evolution
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