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