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Unformatted text preview: Bio 1A – Study Questions, Structure of biological molecules Please remember that these are questions to help you organize the material. For the exam, you are responsible for all of the topics covered in the lecture and in the assigned chapters/pages of the textbook. Please work through the problems in the textbook to test yourself as you study. 1. What major chemical elements are present in all organisms? 2. What are the 4 major classes of biomolecules? 3. What is the chemical building block and type of linkage found in the following: a. Carboxypeptidase b. a bacterial chromosome c. an RNA virus d. sucrose 4. How do hydrophilic and hydrophobic compounds interact with water? 5. What are three different cellular functions of proteins? 6. Draw a peptide bond and show how it is formed. 7. What are the different chemical properties found in the R groups of amino acids? What kinds of R‐groups occur on the surface of integral membrane proteins? On the surface of cytoplasmic proteins? 8. What are the different levels of structure found in proteins? 9. What is the difference between a protein that has tertiary structure and a protein that has quaternary structure? 10. Name a polysaccharide found in (i) plant cells; (ii) animal cells. How do they differ in structure? 11. What is the difference between sucrose, fructose and glucose? 12. Is a phospholipid an amphipathic molecule? Why or why not? 13. Why are phospholipids prone to forming bilayers? 14. Why don’t fats dissolve in water? 15. Name two other kinds of lipids that are found in biological systems. What are their functions? 16. What kind of molecule is cholesterol? 17. What is the difference between cis‐ and trans‐ fatty acids? 18. What are the chemical and structural differences between DNA and RNA? ...
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- Spring '08