Which type(s) of mutation might lead to a threonine auxotrophic revertant?

A. Point mutation
B. Missense mutation
C. Base substitution
D. All of the choices are correct.


Answer: D

Biology & Microbiology

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The types of living organisms on Earth have changed over time, new species have originated, and species have disappeared. These are examples of

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Which of the following is TRUE concerning

seeds?

a. Present-day ferns produce seeds. b. Seeds contain an immature sporophyte. c. Pollen grains mature into seeds. d. Seeds contain a food source. e. All of these are true

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What chemical group is found in a nucleotide but not in a nucleoside?

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All of the following are reasons to classify a new strain of bacteria except

A) 50% different genetic material. B) take up genetic material from their environment. C) genetic variant. D) mutations. E) gene transfers.

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