D. U.S. Supreme Court rulings.
42. Genetic engineering may be defined as
A. the altering of normal cell reproduction
B. a branch of applied chemistry.
C. a procedure that holds little promise.
D. a study on life-saving enzymes.
43. According to the passage, human interferon
A. is a hormone that causes disease.
B. could be used to treat cancer.
C. is a viral disease
D. has been cured
44. In this passage, the three genetically engineered medical products are presented
A. as a process.
B. from earliest to latest.
C. in a simple list.
D. as a story.
45. In the last paragraph, the word weighed has the closest meaning with
A. had great influence
B. became a burden.
C. measured accurately.
D. considered carefully.
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