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Lipids MCAS Practice Name: 1. 2. 3. Date: All living things contain which element? A. helium B. C. copper D. carbon 5. sodium Many aquatic birds secrete waxy organic substances that repel water. The birds use these substances to coat their feathers. An analysis of these substances would reveal that they are composed mostly of Which phrase correctly describes cellulose? A. A polymer made of glucose A. lipids. B. proteins. B. A branched form of sucrose C. carbohydrates. D. nucleic acids. C. A disaccharide D. A simple sugar Fatty acids are one of the products that result from the action of lipase in the digestive system. What is one way that fatty acids are used in the body? A. for storing energy B. for encoding genetic information C. as the building blocks of antibodies 6. D. as the building blocks of hemoglobin 4. The structural formula of cellulose is shown. 7. Which type of molecule in the yolk of a chicken egg provides the most energy for a developing chick? A. lipid B. nucleic acid C. salt D. water 8. 9. page 1 Which group of organic compounds contains fatty acids? A. carbohydrates B. lipids C. nucleic acids D. proteins The molecules made by living cells are mainly assembled around which element? A. Calcium B. Carbon C. Hydrogen D. Oxygen All of the following are organic molecules except— A. protein. B. lipid. C. carbohydrate. D. salt. Which of the following is not a carbohydrate? A. Cellulose B. Lipids C. Monosaccharides D. Starch 10. All carbohydrates are made of— A. carbon, hydrogen, and oxygen. B. glucose, sucrose, and fructose. C. cellulose, glycogen, and starch. 15. D. guanine, alanine, and cytosine. 11. 16. Which of the following lists of elements contains the most common elements in organic compounds? 14. potato chips B. bread C. sugar D. carrots An iodine solution is placed on the cut side of a potato. Within seconds, a blue-black color appears. What is most likely occurring? calcium, iron, and potassium A. a positive test for proteins B. carbon, hydrogen, and oxygen B. a positive test for starches C. chlorine, phosphorus, and sodium C. a negative test for proteins D. a negative test for starches What do disaccharides, such as sucrose, and polysaccharides, such as starch, have in common? A. They are lipids made of fatty acids. B. They are proteins made of amino acids. C. They are nucleic acids made of nucleotides. 17. D. They are carbohydrates made of simple sugars. 13. A. A. D. copper, magnesium, and sulfur 12. The brown paper test for lipids is positive when food is placed on the paper and a spot forms which will allow light to pass through it. Which food would give the most positive test for lipids? proteins. B. C. sugars. D. alcohols. A. Carbon forms crystal structures under certain conditions. B. Carbon can exist as a solid, liquid, or gas. C. Carbon bonds in many ways with itself to form chains. D. Carbon exists in radioactive forms. Lipids are composed of fatty acids and— A. What characteristic of carbon (C) makes it essential to living organisms? 18. glycerol. Which of the following is the main reason that humans need to include carbohydrates in their diet? A. The structure of which molecule contains a glycerol backbone? Carbohydrates are broken down in cells for energy. B. Carbohydrates combine to form many di erent proteins. A. Protein B. C. C. Nucleic acid D. Lipid Carbohydrates act as catalysts to speed up chemical reactions. Carbohydrate D. Carbohydrates are the building blocks for cell growth and repair. page 2 Lipids MCAS Practice Problem-Attic format version 4.4.274 c 2011–2016 EducAide Software _ Licensed for use by Bethany Gately Terms of Use at www.problem-attic.com Lipids MCAS Practice 1. Answer: D 2. Answer: A 3. Answer: A 4. Answer: A 5. Answer: A 6. Answer: B 7. Answer: B 8. Answer: D 9. Answer: B 10. Answer: A 11. Answer: B 12. Answer: D 13. Answer: B 14. Answer: D 15. Answer: A 16. Answer: B 17. Answer: C 18. Answer: A 10/04/2016