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Biochemistry Test Prep Name:_______________ Class:_________ Date:_______________ 1. Which substance is an inorganic molecule? 1) starch 2) DNA 3) water 10.In plants, simple sugars are least likely to be 4) fat 1) 2) 3) 4) 2. Which statement describes carbohydrates, lipids, proteins, and nucleic acids? 1) 2) 3) 4) They are complex molecules made from smaller molecules. linked together to form proteins broken down into carbon dioxide and water used as a source of energy stored in the form of starch molecules 11. What substance could be represented by the letter X in the diagram below? They are complex molecules made from smaller molecules. They are used to assemble larger inorganic materials. They are simple molecules used as energy sources. 3. In a chemical analysis of a sample of animal tissue, which element would most likely be found in the smallest quantity? 1) hydrogen 3) iodine 2) carbon 4) oxygen 4. Most organisms contain 1) 2) 3) 4) organic compounds, only inorganic compounds, only both organic and inorganic compounds neither organic nor inorganic compounds 5. The chart below indicates the elements contained in four different molecules and the number of atoms of each element in those molecules. 1) carbohydrates 3) carbon dioxide 2) ozone 4) water 12. What is the ratio of hydrogen atoms to oxygen atoms in a molecule of glucose? 1) 1:1 2) 2:1 3) 3:1 4) 1:2 13. Two examples of carbohydrates are 1) fatty acids and glycerol 3) sugars and starches 2) fats and waxes 4) amino acids and alcohol 14. Which compound has the structural formula shown below? Which molecule can be classified as organic? 1) A 2) B 3) C 4) D 6. Which substance is an inorganic compound? 1) water 2) glucose 3) maltase 4) insulin 7. Which substances are inorganic compounds? 1) 2) 3) 4) water and salts 1) starch 4) glucose 1) sources of stored energy and transmitters of genetic information 2) sources of stored energy and components of 8. Which substance plays a major role in most of the chemical reactions that occur in a living cell? cellular membranes 3) transmitters of genetic information and catalysts of chemical reactions 4) catalysts of chemical reactions and components of cellular membranes 2) glycogen 3) glycerol 4) maltose 9. Which compound is a polysaccharide? 1) glucose 2) maltase 3) ribose 3) ATP 15. In living organisms, lipids function mainly as proteins and carbohydrates fats and oils enzymes and hormones 1) water 2) PGAL 4) starch Page 1 16. Base your answer to the following question on the information in the chart below and on your knowledge of biology. Which class of compounds includes the compound represented in the diagram below the chart? 1) A 2) B 3) C 4) D 17. Vegetable oils, such as corn oil, belong to which general class of organic substances? 1) lipids 3) carbohydrates 2) proteins 4) salts 18. The function of most proteins depends primarily on the 1) 2) 3) 4) type and order of amino acids environment of the organism availability of starch molecules nutritional habits of the organism 19. In what class of organic molecules would hemoglobin, insulin, albumin, and maltase, all of which are composed of chains of amino acids, be placed into? 1) proteins 3) lipids 2) nucleic acids 4) carbohydrates 20. An element found in all proteins but not found in carbohydrates and lipids is 1) carbon 3) oxygen 2) hydrogen 4) nitrogen Page 2 Answer Key Biochemistry Test Prep 1. 3 2. 1 3. 3 4. 3 5. 1 6. 1 7. 1 8. 1 9. 4 10. 1 11. 1 12. 2 13. 3 14. 4 15. 2 16. 2 17. 1 18. 1 19. 1 20. 4 Page 3