Which of the following occurs in E. coli when lactose is absent from its environment?
A. Large amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made.
B. Trace amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made.
C. No ?-galactosidase, lactose permease, and galactoside transacetylase is made.
D. The lac operon is induced.
E. Polycistronic mRNA levels would be very high.
B. Trace amounts of ?-galactosidase, lactose permease, and galactoside transacetylase are made.
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Indicate whether the statement is true or false.
What law was passed to address the problem of rapid species loss in the United States?
A) the Endangered Species Act of 1973 B) the Wilson-Biophilia Act of 1994 C) the Biodiversity Act of 1975 D) the Human Intervention Act of 1979
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Which of the following is involved in translation?
A) rRNA only B) tRNA only C) mRNA only D) both mRNA and tRNA E) mRNA, rRNA, and tRNA are all involved.