The first single-gene disorder for which the mechanism of mutation was understood at a molecular level was

A) cystic fibrosis.

B) hemophilia.

C) sickle cell disease.

D) diabetes mellitus.


C) sickle cell disease.

Biology & Microbiology

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X-ray crystallography was used to determine the structure of:

A. cholesterol. B. vitamin B12. C. myoglobin. D. insulin. E. All of these choices are correct.

Biology & Microbiology

Triglycerides are stored primarily in this type of tissue.

A. adipose B. cardiac C. epithelial D. nervous E. muscular

Biology & Microbiology

Discuss how the therapy for PKU would be different if the disease was not caused by the essential amino acid

phenylalanine, but rather by a non-essential amino acid. Would the disorder be potentially more or less life-threatening? Explain your reasoning. What will be an ideal response?

Biology & Microbiology

Which phylum includes members that have a body divided into three regions called the visceral mass, head-foot, and mantle?

a. Rotifera b. Mollusca c. Nemertea d. Platyhelminthes

Biology & Microbiology