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Source: http://www.doksinet Biochemistry II: Carbohydrates, Proteins, Lipids and Nucleic Acids Name Date Multiple Choice Questions 1. What element forms the skeleton of organic molecules? a. hydrogen atoms b. phosphate atoms c. carbon atoms d. water molecules 2. How many bonds can carbon atoms form? a. two b. four c. one d. three 3. What happens in a dehydration reaction? a. molecules are broken apart b. monomers are bonded together and a water molecule is released c. atoms are joined d. it depends on what molecule it is 4. What reactions break apart polymers? a. hydrolysis reactions b. dehydration reactions c. neutralization reactions d. catalytic reactions 5. What is the general formula for carbohydrates? a. (CH2O)n b. (C2HO)n c. (CHCHCH) d. (COOH) 6. In what category of organic molecules are sugars placed? a. proteins b. lipids c. hormones d. carbohydrates 7. What are long chains of sugars called? a. monosaccharides b. disaccharides

c. polysaccharides d. proteins 1 Period Source: http://www.doksinet Biochemistry II: Carbohydrates, Proteins, Lipids and Nucleic Acids 8. What is the most common monosaccharide? a. cellulose b. glucose c. triglycerides d. starches 9. Plants store energy as a. starch b. lactose c. RNA d. protein 10. Muscle cells store energy in the form of a. starch b. glycogen c. cellulose d. steroids 11. Plant cell walls contain large amounts, of what polysaccharide? a. carbon b. water c. chitin d. cellulose 12. What type of organic molecule is a fat? a. carbohydrate b. lipid c. starch d. protein 13. What type of bonds found between carbon atoms cause fats to form kinks? a. ionic b. polar c. double d. proton 14. Fats and oils are composed of what two groups of molecules? a. starch and sugar b. glucose and fructose c. fatty acids and glycerol d. water and cellulose 15. What best describes phospholipid molecules? a. their chemical formula is (CH2O)n b. they form cell

membranes c. they are proteins d. they are ionic 2 Source: http://www.doksinet Biochemistry II: Carbohydrates, Proteins, Lipids and Nucleic Acids 16. What structures are found in steroid molecules? a. molecular rings b. proteins c. waxes d. double helixes 17. What monomers make up proteins? a. starches b. enzymes c. nucleic acids d. amino acids 18. How many different amino acids are there? a. ten b. twenty c. four d. hundreds 19. What are the bonds between amino acids called? a. hydrogen bonds b. peptide bonds c. ionic bonds d. covalent bonds 20. Where do substrates attach to an enzyme? a. peptide bond b. ring binding site c. active site d. enzymatic site 21. Which of the following types of molecules is found in genetic material? a. cellulose b. enzymes c. lipids d. nucleic acids 22. Which of the following are found in nucleotides of DNA and RNA respectively? a. deoxyribose and ribose b. proteins and enzymes c. fats and oils d. sugars and starches 23. What are the four bases in DNA?

a. first, second, third and fourth b. adenine, guanine, cytosine, uracil c. nitrogen, hydrogen, carbon and phosphate d. adenine, guanine, cytosine, thymine 3 Source: http://www.doksinet Biochemistry II: Carbohydrates, Proteins, Lipids and Nucleic Acids 24. Which of the following molecules function as an intracellular message carriers? a. cAMP or cyclic adenosine monophosphate b. enzymes c. glycogen d. water 25. What is the function of ATP, adenosine triphosphate? a. message carrier b. store and transport energy c. make proteins d. breakdown sugars 4 Source: http://www.doksinet Biochemistry II: Carbohydrates, Proteins, Lipids and Nucleic Acids Biochemistry II: Carbohydrates, Proteins, Lipids and Nucleic Acids Multiple Choice Answers 1. c 2. b 3. b 4. a 5. a 6. d 7. c 8. b 9. a 10. b 11. d 12. b 13. c 14. c 15. b 16. a 17. d 18. b 19. b 20. c 21. d 22. a 23. d 24. a 25. b 5