Phenylketonuria is a congenital disease caused by a defect in the metabolism of the amino acid phenylalanine. The unmetabolized protein accumulates in the bloodstream, and if undetected and untreated, it will result in ________.
a. blindness
b. death
c. mental retardation
d. all the above
Question 2
Larger syringes are calibrated in 2 mL, 3 mL, 5 mL, 10 mL, and larger, up to 60 mL. The most commonly used size is the ________ mL syringe, because it is the most accurate with small doses of medication.
a. 2
b. 3
c. 5
d. 10
Many human diseases are caused by mutations in single genes
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