Nutrition - Chapter 6 Review Questions


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Nutrition - Chapter 6 Review Questions

  1. 1. Wardlaw’s Contemporary Nutrition, Seventh Edition Copyright © The McGraw-Hill Companies, InC) Permission required for reproduction or display. Gordon M. Wardlaw Anne M. Smith Chapter 6
  2. 2. Question 1 <ul><li>The basic building block of a protein is called a(n) </li></ul><ul><li>A. fatty acid. </li></ul><ul><li>B. monosaccharide. </li></ul><ul><li>C. amino acid. </li></ul><ul><li>D. keto acid. </li></ul>
  3. 3. Question 2 <ul><li>The chemical element found in all amino acids but not found in either carbohydrates or fats is </li></ul><ul><li>A. carbon. </li></ul><ul><li>B. nitrogen. </li></ul><ul><li>C. oxygen. </li></ul><ul><li>D. hydrogen. </li></ul>
  4. 4. Question 3 <ul><li>Which of the following is true about protein? </li></ul><ul><li>A. It is unique in that it is the only dietary component that contains selenium. </li></ul><ul><li>B. It is important primarily for increasing bone density. </li></ul><ul><li>C. It is made up of combinations of approximately 20 amino acids. </li></ul><ul><li>D. It is made up of combinations of amino acids and fatty acids. </li></ul>
  5. 5. Question 4 <ul><li>An essential amino acid </li></ul><ul><li>A. can be synthesized in the body if there is a nitrogen source. </li></ul><ul><li>B. can be synthesized in the body if caloric intake is adequate. </li></ul><ul><li>C. cannot be synthesized in the body in sufficient quantity to meet body needs. </li></ul><ul><li>D. can be formed in the body from semiessential amino acids. </li></ul>
  6. 6. Question 5 <ul><li>The nitrogen from amino acid breakdown is </li></ul><ul><li>A. stored in the liver. </li></ul><ul><li>B. oxidized to carbohydrate. </li></ul><ul><li>C. converted to urea. </li></ul><ul><li>D. converted to fat. </li></ul>
  7. 7. Question 6 <ul><li>All of the following are true of high quality protein except </li></ul><ul><li>A. it contains all essential amino acids. </li></ul><ul><li>B. it provides 7 kcal/g of energy. </li></ul><ul><li>C. it can support body maintenance. </li></ul><ul><li>D. it can support body growth. </li></ul>
  8. 8. Question 7 <ul><li>Which of the following is not true about an incomplete protein source? </li></ul><ul><li>A. It lacks one or more essential amino acids. </li></ul><ul><li>B. It cannot support body growth and maintenance by itself. </li></ul><ul><li>C. To adequately meet protein needs from incomplete protein sources a person would have to eat two complementary proteins. </li></ul><ul><li>D. Lower quantities of this source could be eaten to get adequate quantities of essential amino acids. </li></ul>
  9. 9. Question 8 <ul><li>Which of the following is a food that provides all of the essential amino acids? </li></ul><ul><li>A. Wheat </li></ul><ul><li>B. Peanut butter </li></ul><ul><li>C. Navy beans </li></ul><ul><li>D. Milk </li></ul>
  10. 10. Question 9 <ul><li>Proteins are digested in which areas of the body? </li></ul><ul><li>A. Mouth and stomach </li></ul><ul><li>B. Mouth and small intestine </li></ul><ul><li>C. Stomach and small intestine </li></ul><ul><li>D. Small and large intestines </li></ul>
  11. 11. Question 10 <ul><li>What enzyme is released by the stomach to digest protein? </li></ul><ul><li>A. Pepsin </li></ul><ul><li>B. Lipoprotein lipase </li></ul><ul><li>C. Amylase </li></ul><ul><li>D. Trypsin </li></ul>
  12. 12. Question 11 <ul><li>Which of the following is not true about pepsin? </li></ul><ul><li>A. Amino acid chains are the digestive products of its action. </li></ul><ul><li>B. Pepsin works best in an alkaline environment. </li></ul><ul><li>C. Acid activates pepsin. </li></ul><ul><li>D. Pepsin acts on food in the stomach. </li></ul>
  13. 13. Question 12 <ul><li>If the diet is lacking an essential amino acid, what will be the course of action? </li></ul><ul><li>A. Body cells will synthesize it. </li></ul><ul><li>B. Protein synthesis will be limited. </li></ul><ul><li>C. Health will not be affected as long as other nutrients are adequate. </li></ul><ul><li>D. Proteins will be made but they will lack that particular amino acid. </li></ul>
  14. 14. Question 13 <ul><li>If a food does not contain the necessary amounts of a certain amino acid to meet a body need, that amino acid is referred to as a </li></ul><ul><li>A. complementary amino acid. </li></ul><ul><li>B. essential amino acid. </li></ul><ul><li>C. limiting amino acid. </li></ul><ul><li>D. dispensable amino acid. </li></ul>
  15. 15. Question 14 <ul><li>When protein consumption is in excess of body needs and energy needs are met, the excess amino acids are metabolized and the energy in the molecule is </li></ul><ul><li>A. stored as glycogen and/or fat. </li></ul><ul><li>B. excreted in the urine. </li></ul><ul><li>C. stored as amino acids in muscle. </li></ul><ul><li>D. stored as amino acids in the liver. </li></ul>
  16. 16. Question 15 <ul><li>Approximately how many different amino acids are used in the synthesis of body proteins? </li></ul><ul><li>A. 5 </li></ul><ul><li>B. 9 </li></ul><ul><li>C. 20 </li></ul><ul><li>D. 29 </li></ul>
  17. 17. Question 16 <ul><li>If the carbohydrate content of the diet is insufficient to meet the body’s needs for glucose, which of the following can be converted to glucose? </li></ul><ul><li>A. Urea </li></ul><ul><li>B. Fatty acids </li></ul><ul><li>C. Amino acids </li></ul><ul><li>D. Ketones </li></ul>
  18. 18. Question 17 <ul><li>What is meant by the amino acid sequence of a protein? </li></ul><ul><li>A. Number of side chains in the protein </li></ul><ul><li>B. Folding arrangement of the peptide chain </li></ul><ul><li>C. Order of appearance of amino acids in the peptide chain </li></ul><ul><li>D. Order of appearance of only the essential amino acids in the protein </li></ul>
  19. 19. Question 18 <ul><li>Which of the following is not true about the events during and after absorption of protein digestive breakdown products? </li></ul><ul><li>A. Most protein eaten ends up as individual amino acids in the blood. </li></ul><ul><li>B. Small peptides are digested further to amino acids inside the absorptive cells of the small intestine. </li></ul><ul><li>C. Many whole proteins are absorbed and enter the blood. </li></ul><ul><li>D. Amino acids travel to the liver via the portal vein. </li></ul>
  20. 20. Question 19 <ul><li>A hereditary condition caused by an incorrect amino acid in the amino acid sequence of a protein chain is </li></ul><ul><li>A. kwashiorkor. </li></ul><ul><li>B. sickle cell anemia. </li></ul><ul><li>C. marasmus. </li></ul><ul><li>D. edema. </li></ul>
  21. 21. Question 20 <ul><li>The chemical bond joining adjacent amino acids is called a(n) _____________ bond. </li></ul><ul><li>A. glycosidic </li></ul><ul><li>B. ionic </li></ul><ul><li>C. amino </li></ul><ul><li>D. peptide </li></ul>
  22. 22. Answer Key – Chapter 6 <ul><li>C </li></ul><ul><li>B </li></ul><ul><li>C </li></ul><ul><li>C </li></ul><ul><li>C </li></ul><ul><li>B </li></ul><ul><li>D </li></ul><ul><li>D </li></ul><ul><li>C </li></ul><ul><li>A </li></ul><ul><li>B </li></ul><ul><li>B </li></ul><ul><li>C </li></ul><ul><li>A </li></ul><ul><li>C </li></ul><ul><li>C </li></ul><ul><li>C </li></ul><ul><li>C </li></ul><ul><li>B </li></ul><ul><li>D </li></ul>