Nutrition 6

  1. Proteins differ from carbohydrates and lipids in that they contain

    D) nitrogen
  2. Of the chemical groups listed below, only a/an________group is not part of all amino acids

    C) methyl
  3. A peptide bond is formed when two amino acids are combined by linking one

    A) amino group to the acid group of another amino acid
  4. Compared to a protein in its original state, a protein which has been denatured

    C) has lost its biological activity
  5. Protein digestion occurs primarily in

    B) the small intestine
  6. Pepsin is

    B) a gastric enzyme which breaks large polypeptides into smaller polypeptides
  7. Protein digestion in the stomach produces

    B) small polypeptides
  8. Pepsinogen is converted to pepsin by

    D) hydrocholoric acid
  9. A non-essential amino acid

    B) can be produced endogenously if nitrogen and carbohydrate are present
  10. A human adult requires__________essential amino acids

    A) 9
  11. A limiting amino acid is

    B) the essential amino acid found in shortest supply relative to the amount needed for protein synthesis
  12. Of the factors listed below, only____________does not affect the quality of dietary protein

    D) the presence of all amino acids
  13. True/False (support your answer with an explanation)

    Incomplete proteins will not be absorbed because of the lack of one or more EAA

    The absorption of amino acids from the GI tract does not require the presence of all EAA. It is in support of protein synthesis that all EAA must be available simultaneously in the body
  14. ___________would complement the protein in dried beans

    E) any of the above
  15. Of the functions listed below, only____________is not amoung the general roles of protein

    A) storing energy
  16. Proteins are important regulators of acid-base balance because

    C) they can function as both acids and bases
  17. Contractile proteins function in

    E) muscle function
  18. Hemoglobin functions in

    B) oxygen transport
  19. Transferrin functions in

    B) iron transport
  20. Insulin functions in

    C) blood glucose regulation
  21. Opsin functions in

    E) vision
  22. If nitrogen balance is negative,

    C) nitrogen output exceeds nitrogen intake
  23. If nitrogen intake is equal to nitrogen output, the subject is

    D) consuming enough protein to replace body losses
  24. True/False (support your answer with an explanation)

    Negative nitrogen balance occurs in children and pregnant women because they require extra protein

    Positive nitrogen balance occurs in this situation
  25. Protein deficiency is most commonly seen in Third World countries

    B) children
  26. List some of the body systems that are affected in a child when protein intake is insufficient
    When a child's protein intake is insufficient, the body systems affected include the muscles (including the heart), the brain, the metabolic system, the system regulating growth, the system regulating fluid balance, the liver, the skin and hair, the immune system, and the blood
  27. Why does PEM most commonly strike newly weaned children?
    PEM is most common amoung newly weaned children because their bodies must adjust to a starchy, low-protein diet after having been accustomed to a diet of protein-rich breast milk
  28. True/False (support your answer with an explanation)

    As athletes or muscle-builders have higher protein needs than ordinary foods can supply, protein supplements are necessary

    Although athletes may have a higher protein need than non-athletes, they can easily obtain enough protein through the increased food intake usually consumed for extra energy. Exercise, not protein supplements, stimulates muscle-building
  29. Nutritional concerns are greatest in the diet of

    C) vegans
  30. A vegan diet will potentially have the greatest negative impact on the nutritional status of

    C) growing children
  31. What micronutrients can potentially be a problem for vegetarians?
    • -Iron
    • -zinc
    • -calcium
    • -vitamin B-12
    • -vitamin D
  32. The health benefits of a vegetarian diet include a reduced risk of all of the ailments listed below, except

    A) migraine
  33. The ideal level of protein intake is____________of total energy intake for most adults

    A) 10-12%
  34. In Canada, protein intake is about_____________of energy intake

    C) 16%
  35. The only segment of the Canadian population that may be at risk for dietary protein inadequacy is

    D) female seniors
Card Set
Nutrition 6
NUTR 330