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The quality of protein in tofu and tempeh is almost identical to that of meat.

A) True
B) False

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A healthy pregnant woman is in positive nitrogen balance.

A) True
B) False

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Essential amino acids are more important to the human body than nonessential amino acids.

A) True
B) False

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Which part of an individual amino acid distinguishes it from other amino acids?


A) side chain
B) central carbon
C) amine group
D) acid group

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

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The USDA Food Patterns counts 1/3 cup of nuts as equivalent to


A) one serving of meat.
B) one ounce of meat.
C) one pound of meat.
D) one day's recommended protein intake for an average adult.

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

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Denaturation results in the loss of the protein's function.

A) True
B) False

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Of the 20 amino acids used by the human body,how many are considered nonessential?


A) none
B) 9
C) 11
D) 20

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

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When a protein attracts or releases hydrogen,it acts as a


A) transporter.
B) limiter.
C) buffer.
D) hydrogenater.

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

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Because of their increased protein needs,it is unhealthful for athletes to choose to become vegetarians.

A) True
B) False

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Most Americans consume sufficient or excess amounts of dietary protein.

A) True
B) False

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Two amino acids are joined together by a peptide bond to form a dipeptide.What is released as a by-product of this process?


A) ammonia
B) water
C) carbon dioxide
D) nitrogen

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

Correct Answer

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The part of the protein molecule that contains nitrogen is the


A) acid group.
B) amine group.
C) side chain.
D) hydrogen group.

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

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Peptide bonds are chemical bonds in which the amine group of one amino acid binds to the acid group of another amino acid.

A) True
B) False

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Which of the following individuals is MOST likely to be in positive nitrogen balance?


A) a woman who is six months pregnant
B) an athlete who is consuming 500 Calories a day
C) a fire victim with severe burns
D) a college student who is in good health

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

Correct Answer

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It is necessary to eat animal-based proteins to stay healthy.

A) True
B) False

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A deficiency of protein can lead to what condition in which fluid accumulates in the body's tissue spaces?


A) edema
B) celiac disease
C) marasmus
D) acidosis

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

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Proteases are


A) protein messengers that are released from storage in response to an alteration in the body's homeostasis.
B) transport proteins that move substances across cell membranes.
C) defense proteins that attack foreign bacteria, viruses, and toxins.
D) enzymes that break down protein in the small intestine.

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

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Consuming individual amino acid supplements on an empty stomach boosts the digestibility of proteins consumed at the following meal.

A) True
B) False

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Explain the roles of pepsin and proteases in the chemical digestion of proteins.

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Pepsin and proteases are enzymes that pl...

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