The lac operon of E. coli is ________ when the repressor is bound to lactose.
a. active
b. inactive
c. cloned
d. unregulated
active
Biology & Microbiology
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Supertasters for the chemical PTC are ____ for the trait
a. homozygous dominant b. heterozygous c. homozygous recessive d. either homozygous dominant or homozygous recessive e. either homozygous dominant or heterozygous
Biology & Microbiology
Answer the question using the accompanying figure. Which branch of this phylogenetic tree identifies Bacteria?
a. A b. B c. C d. D e. E
Biology & Microbiology
The degree of relatedness between a niece and an uncle is _____, and the degree of relatedness
between first cousins is ______.
a. 0.75; 0.50 b. 0.50; 0.25 c. 0.25; 0.125 d. 0.125; 0.0625 e. 0.0625; 0.03125
Biology & Microbiology
An atom carries no charge because it has as many electrons as ____
a. protons b. neutrons c. orbitals d. neutrinos e. shells
Biology & Microbiology