Symptoms of phenylketonuria (PKU) may be minimized or suppressed by a diet low in
a. serine.
b. glycine.
c. phenylalanine.
d. proline.
e. glutamic acid.
C
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Germline gene therapy would correct a genetic defect in
A) an unaffected individual and his or her offspring. B) an individual derived from the gamete that received gene therapy and all of his or her descendants. C) the parents of an affected individual. D) the unaffected sibling of an affected individual.
When caught early, breast cancer is often treated by
1.lumpectomy. 2.modified radical mastectomy. 3.radical mastectomy. 4.chemotherapy, alone. 5.radiation therapy, alone.
Viruses are characterized by all of the following except
A. being specific to the hosts they infect. B. being acellular. C. being capable of independent reproduction. D. being found in every organism investigated so far.
Amphibians assumed to have evolved from
A) reptiles. B) mollusks. C) lobefin fish. D) arthropods. E) segmented worm.