Question

Which of the following statements is true of a Neurospora valine auxotroph?

A. It can synthesize valine on its own.
B. It requires valine in its growth medium to survive.
C. It cannot utilize valine as a nutrient source.
D. It is resistant to the effects of valine.

Answer 1

An auxotroph is a nutritional mutant that requires a specific nutrient in its growth medium to survive. A Neurospora valine auxotroph cannot synthesize valine on its own and requires valine in its growth medium to survive.

Step-by-step explanation:

An auxotroph is a nutritional mutant that requires a specific nutrient in its growth medium to survive. In the case of a Neurospora valine auxotroph, it means that the mutant cannot synthesize valine on its own and requires valine in its growth medium to survive. Therefore, option B, 'It requires valine in its growth medium to survive,' is the correct statement.