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Iron is considered a


A) major mineral, because it has a crucial physiological role.
B) trace mineral, because less than 100 milligrams are required daily in the diet.
C) major mineral, because it is extremely abundant in the Earth.
D) trace mineral, because it is rare on the Earth.

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

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An amine group that is removed from an amino acid within a hepatocyte is then


A) used to form a peptide bond between a protein and a lipid.
B) used to generate bile salts and excreted in the feces.
C) converted to urea and eliminated as part of urine.
D) sent to a mitochondrion to enter the citric acid cycle.

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

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Recommended daily allowances are government-established values for nutrient intake that are used for food planning and labeling.

A) True
B) False

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