A Neurospora mutant cannot grow unless the amino acid, leucine, is added to its growth medium. This strain

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The Neurospora mutant that cannot grow unless the amino acid leucine is added to its growth medium is an auxotroph. An auxotroph is a microorganism that cannot synthesize a particular organic compound required for its growth, and in this case, the compound is leucine. Therefore, the strain requires leucine to grow and is dependent on exogenous leucine supplementation.

A Neurospora Mutant Cannot Grow Unless the Amino Acid, Leucine