5. Groups A and B in the table below contain molecular formulas of compounds.

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1 1. Which group consists entirely of organic molecules? A) protein, oxygen, fat B) protein, starch, fat C) water, carbon dioxide, oxygen D) water, starch, protein 2. Which statement describes starches, fats, proteins, and DNA? A) They are used to store genetic information. B) They are complex molecules made from smaller molecules. C) They are used to assemble larger inorganic materials. D) They are simple molecules used as energy sources. 3. Water is classified as an inorganic compound because it A) does not contain carbon B) does not contain nitrogen C) contains hydrogen D) contains oxygen 4. A chemical analysis of organisms from each kingdom shows that living things are primarily composed of the elements A) carbon, hydrogen, chlorine, and sulfur B) carbon, hydrogen, oxygen, and nitrogen C) iron, calcium, hydrogen, and oxygen D) chlorine, carbon, calcium, and sulfur 5. Groups A and B in the table below contain molecular formulas of compounds. How would the compounds in these groups be chemically classified? A) group A - inorganic group B - organic B) group A - organic group B - inorganic C) group A - monosaccharides group B - disaccharides D) group A - disaccharides group B - monosaccharides 6. Most of the chemical reactions occurring in a living cell depend on the presence of an inorganic compound known as A) glycerol B) glycogen C) maltose D) water 7. Base your answer to the following question on the information in the diagram below and on your knowledge of biology. In an autotrophic organism, substance B functions as a A) source of energy B) hormone C) vitamin D) biotic resource

2 8. Even though human proteins are synthesized from only 20 different amino acids, there are thousands of different proteins found in human cells. This great variety of proteins is possible because the A) size of a specific amino acid can vary within a protein B) chemical composition of a specific amino acid can vary C) sequence and number of amino acids can be different in each protein D) same amino acid can have many different properties 9. The way a protein molecule is folded determines the shape of the molecule, which determines the A) function of that protein B) structure of ATP containing that protein C) type of simple sugars in that protein D) amino acids in that protein 10. The shape of a protein is originally determined by the A) size of the protein molecule B) location of the protein within the cell C) arrangement of amino acids in the protein D) function the protein must carry out 11. The diagram below represents the synthesis of a portion of a complex molecule in an organism. Which row in the chart could be used to identify the building blocks and product in the diagram? A) 1 B) 2 C) 3 D) 4

3 12. The diagram below represents a biological process Which set of molecules is best represented by letters A and B? A) A: oxygen and water B: glucose B) A: glucose B: carbon dioxide and water C) A: carbon dioxide and water B: glucose D) A: glucose B: oxygen and water 13. Most organisms contain A) organic compounds, only B) inorganic compounds, only C) both organic and inorganic compounds D) neither organic nor inorganic compounds 14. Which formula represents an organic compound? A) Mg(OH)2 B) NaCl C) Cl2H22O11 D) NH3 15. Base your answer to the following question on the diagram below and on your knowledge of biology. The diagram represents a portion of a starch molecule. The building blocks for this molecule are A) amino acids B) simple sugars C) fats D) molecular bases

4 16. The diagram below represents a protein molecule present in some living things. This type of molecule is composed of a sequence of A) amino acids arranged in a specific order B) simple sugars alternating with starches arranged in a folded pattern C) large inorganic subunits that form chains that interlock with each other D) four bases that make up the folded structure 17. A pesticide that kills an insect by interfering with the production of proteins in the insect would most directly affect the activity of A) ribosomes B) minerals C) chloroplasts D) mitochondria 18. Which row in the chart below correctly pairs a food molecule with its building block? A) 1 B) 2 C) 3 D) During the process of photosynthesis, energy from the Sun is converted into A) chemical energy in the bonds of inorganic molecules B) chemical energy in the bonds of organic molecules C) enzymes used to produce inorganic molecules D) enzymes used to produce organic molecules

5 20. What substance could be represented by the letter X in the diagram below? A) carbohydrates B) ozone C) carbon dioxide D) water 21. Which substance is an inorganic compound? A) water B) glucose C) maltase D) insulin 22. Organisms are composed of A) organic compounds only B) inorganic compounds only C) both organic and inorganic compounds D) neither organic nor inorganic compounds 23. In the diagram below, which substance belongs in area Z? A) water B) oxygen C) nitrogen D) carbon 24. An inorganic compound essential to the survival of animals is A) glucose B) salt C) maltase D) cellulose

6 25. Base your answer to the following question on the diagram below, which represents a chemical reaction that occurs in the human body, and on your knowledge of biology. Substances X and Y are examples of which kind of molecule? A) simple sugar B) amino acid C) fat D) hormone 26. In plants, simple sugars are least likely to be A) linked together to form proteins B) broken down into carbon dioxide and water C) used as a source of energy D) stored in the form of starch molecules 27. Some structural formulas of organic molecules are shown below. Which structural formulas represent carbohydrate molecules? A) 1 and 5 B) 2 and 4 C) 3 and 2 D) 4 and 3

7 Answer Key organic review 1. B 2. B 3. A 4. B 5. B 6. D 7. A 8. C 9. A 10. C 11. B 12. C 13. C 14. C 15. B 16. A 17. A 18. C 19. B 20. A 21. A 22. C 23. D 24. B 25. A 26. A 27. A