A 5-year-old boy begins to regress in terms of developmental milestones, particularly neurologically. Shortly thereafter, the child enters a coma, and dies 2 years into the coma. Upon autopsy, the myelin sheath in the brain was found to be abnormal, as it contained a large quantity of very long-chain fatty acids in its phospholipids. The adrenal glands were also abnormal in appearance. The child, at the molecular level, had inherited a mutation that led to an inability to catalyze reactions that occur in which one of the following intracellular organelles?

An autosomal recessive disorder characterized by an inability to properly break down certain glycolipids. Accumulation of the lipids in brain cells causes progressive nervous system dysfunction and is usually fatal by age four.Group of answer choicesTay-Sachs diseasesickle-cell diseasecystic fibrosisHuntington’s diseaseNext

Infection during early pregnancy with which of the following can cause fetal death or result in a congenital syndrome that can lead to defects of the brain, heart, eyes, and ears?

A boy grew rapidly and reached a height of 6 ft. 2 in. by the time he was 13 years old. He had normal body proportions and sexual development. Which of the following caused his condition?Multiple ChoiceHypersecretion of growth hormoneHypersecretion of testosteroneElevated vitamin D synthesisAn adrenal tumor that secretes androgens

A human genetic disease caused by a dominant allele; characterized by uncontrollable body movements and degeneration of the nervous system; usually fatal 10 to 20 years after the onset of symptoms.Group of answer choicesHuntington’s diseaseTay-Sachs diseasecystic fibrosissickle-cell diseaseNext

Myelin is rich in _________Blank.Multiple Choicecarbohydrateslipidssaltsnucleic acids