HUMAN PHYSIOLOGY
DIGESTION AND ABSORPTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An untreated person with PKU will have a high level of phenylalanine in the blood
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It is caused by a gene mutation
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An child with PKU will show symptoms before birth
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Phenylalanine is an essential amino acid
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Detailed explanation-1: -The absence of this enzyme leads to the accumulation of phenylalanine in the body causing skin pigmentation, mental retardation, and loss of hair. So the incorrect option is ‘c’. Individuals suffering from phenylketonuria cannot convert phenylalanine to tyrosine.
Detailed explanation-2: -Although infants with PKU usually appear normal at birth, early symptoms may include skin rash, seizures, excessive restlessness, irritable behavior and a musty odor of the body or urine. Later signs include developmental delays, gait disturbances and mental retardation.
Detailed explanation-3: -Some babies with PKU may seem more drowsy and listless than normal. They may have feeding problems. As they continue to take in protein and phenylalanine through their diets, they may have growth, mood, behavior, and thinking problems, seizures as well as other problems.