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Unit 2: Chemistry Test Review

Unit 2: Chemistry Test Review. What is the nucleus of an atom made of?. Protons and Neutrons . What are the negatively charged parts of an atom?. Electrons . Which picture is an ion and why?. A. because it has a different number of electrons than protons, so it is a charged atom .

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Unit 2: Chemistry Test Review

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  1. Unit 2: Chemistry Test Review

  2. What is the nucleus of an atom made of? • Protons and Neutrons

  3. What are the negatively charged parts of an atom? • Electrons

  4. Which picture is an ion and why? • A. because it has a different number of electrons than protons, so it is a charged atom

  5. What is the charge of atom A, and what is the charge of atom B? • A is +1 • B is neutral (0)

  6. What type of bond shares electrons? • Covalent

  7. In this picture of sugar being poured into water: what is the solvent: • Water

  8. What color does cabbage juice turn in the presence of acid? • Pink

  9. What color is cabbage juice naturally in water? • Purple

  10. What color does cabbage juice turn in the presence of base? • Green

  11. What is the pH range of an acid • Less than 7

  12. What is the pH range of an base? • Greater than 7

  13. Term that describes water molecules sticking to other water molecules: • Cohesion

  14. Term that describes water molecules sticking to surfaces: • Adhesion

  15. What are the 4 macromolecules that necessary for life? • Proteins • Lipids • Carbohydrates • Nucleic Acids

  16. What is the monomer of Nucleic Acids? • Nucleotide

  17. What is the monomer of a carbohydrate? • Sugar

  18. What is the monomer of a protein? • Amino Acid

  19. What is the monomer of a Lipid? • Glycerol and 3 Fatty Acids

  20. What is the function Nucleic Acids? • Store and transmit genetic information

  21. What is the function of carbohydrates? • Energy for all life on earth

  22. What is the function of proteins? • Physical structure and function in all living things

  23. What is the function of Lipids? • Long Term energy Storage.

  24. What are some examples of Nucleic Acids? • DNA and RNA

  25. What are some examples of carbohydrates? • Lactose, Sucrose, Maltose, Galactose, Glucose, Fructose, Cellulose, Amylose

  26. What are some examples of proteins? • Keratin (fingernails, hair), Melanin (skin color), Actin and Myosin (Muscles). • All Enzymes: Amylase, Lactase, Peroxidase

  27. What are some examples of Lipids? • Oil, Butter, Fat, Cholesterol

  28. What are enzymes made of? Proteins Enzyme Active Site Reactants Products

  29. What are some ways that enzymes can be damaged? Boiling pH Change Enzyme Active Site Reactants Products

  30. What are some ways that enzymes can be slowed down? Cold temperatures Inhibitor Molecules Enzyme Active Site Reactants Products

  31. What do enzymes do? Speed up chemical reactions in living things Enzyme Active Site Reactants Products

  32. How are enzymes and catalysts similar? Both speed up chemical reactions by lowering the activation energy Enzyme Reactants Active Site Products

  33. Which of these graphs best describes the reaction of photosynthesis and WHY? Graph A, because the products have more energy than the reactants. Activation energy Products Activation Energy Reactants Reactants Products Graph A Graph B

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