Nutritional Mutations Can Be Defined as ________

Question

Nutritional mutations can be defined as ________.
A) those mutations that do not allow a bacterium or fungus to grow on minimal medium but do allow growth on complete medium
B) those mutations that change the composition of the medium
C) those mutations belonging to the group called prototrophs
D) those mutations caused by site-specific mutagenesis
E) all strains that are not auxotrophic

Accepted Answer

Nutritional mutations are generally those mutations that prevent a bacterium or fungus from synthesizing certain essential compounds that are required for growth on minimal medium, but can still grow on complete medium that contains all required nutrients. Therefore, option A is the correct answer. Options B, C, D, and E are incorrect because they do not accurately define nutritional mutations as described above.