Brown and Goldstein discovered the mechanism of cholesterol uptake by studying fibroblasts from children with which disease?
a. Chronic fatigue syndrome
b. Familial hypercholesterolemia
c. Lupus erythematosis
d. Cystic fibrosis
Answer: b. Familial hypercholesterolemia
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Which number represents the atomic weight of oxygen?
A. 18 B. 16 C. 6 D. Not enough information given
Of the following, which is the oldest event?
a. origin of fungi b. appearance of land tetrapods c. formation of Pangea d. age of dinosaurs e. all of these events are equally old
What factor(s) relating to cells account(s) for the
larger size of elephants compared to mice? a. size b. composition c. weight d. number e. all of these
In the biosynthetic pathway for conversion from homoserine to methionine, you identify a Neurospora crassa double mutant Met1/Met2. This mutant will grow only if which supplement(s) are added to the minimal media?
A) homoserine only B) cysteine only C) homocysteine only D) cystathionine and homocysteine E) methionine only