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What enzyme is released by the stomach to digest protein?


A) Pepsin
B) Lipoprotein lipase
C) Amylase
D) Trypsin

E) B) and D)
F) A) and B)

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The best estimate for the amount of protein required for nearly all adults is _______________ g/kg/day

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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.

E) None of the above
F) A) and B)

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Jack weighs 176 pounds (80 kilograms) . What would be his RDA for protein?


A) 10 grams
B) 64 grams
C) 80 grams
D) 27 grams

E) A) and B)
F) A) and C)

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The one element that protein contains that carbohydrate and fats do not is _______________

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In proteins, amino acids are joined by _______________ bonds

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Which of the following is true about protein intake of people in the United States?


A) Most do not consume enough protein.
B) Most consume approximately the amount needed to balance losses.
C) Athletes generally do not get enough protein without supplements.
D) Most consume more than is needed.

E) B) and C)
F) A) and D)

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_______________ are the building blocks of protein.

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The most reliable source of vitamin B12 for the vegan would be


A) fortified soybean milk.
B) milk.
C) cheese.
D) eggs.

E) A) and D)
F) All of the above

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Which of the following is not true about body proteins?


A) They are in a state of breakdown, rebuilding, and repair.
B) They are static and change little after achievement of adult status.
C) Those in the bone marrow and intestine undergo the most change, in terms of breakdown and synthesis.
D) Their breakdown products, especially amino acids, can be recycled.

E) A) and D)
F) A) and C)

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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.

E) A) and B)
F) B) and C)

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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

E) B) and C)
F) None of the above

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If a person does not eat enough carbohydrate to supply the glucose the body needs, which of the following will happen?


A) Fatty acids will be converted to glucose.
B) The pancreas will convert insulin to glucose.
C) The liver will convert amino acids to glucose.
D) The pancreas will convert protein to glucose.

E) C) and D)
F) None of the above

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Which of the following is true about protein intake in the United States compared to the rest of the world?


A) Plant sources of protein predominate in the United States.
B) We eat less animal sources of protein than people in Asia and Africa.
C) About 70 percent of the protein we eat in the United States comes from animal products.
D) Chicken is our main animal source of protein.

E) A) and B)
F) B) and C)

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Three dietary advantages of plant protein sources over animal sources are: 1) they are a good source of dietary fiber, 2) they are low in saturated fat, and 3) they contain no _______________.

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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.

E) A) and B)
F) A) and C)

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Proteins regulate the acid-base balance of the blood by


A) acting as buffers.
B) releasing nitrogen.
C) releasing an acid.
D) binding sodium ions.

E) All of the above
F) None of the above

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_______________ is a type of malnutrition that results primarily from not consuming enough calories.

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Johnny is 10 years old. He has had minimal protein intake for the last two years. He has just recently had surgery. What are the likely results of his deficient protein intake?


A) His surgical wound will heal quickly and effectively, but he won't grow effectively.
B) His surgical wound will not heal quickly and effectively, but he will grow effectively.
C) The size of his vital organs, including his heart, liver, and muscles, will decrease.
D) His surgical wound will heal effectively and he will grow normally because he can live off fat stores.

E) B) and C)
F) All of the above

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