What is the expression pattern of dominant- negative mutations in petite strains of yeast? A)Expression of wild- type mitochondria is enhanced. B)Mitochondrial membranes become hyperpolarized. C)Expression of mutant mitochondria resembles expression of wild- type mitochondria. D)The function of wild- type mitochondria is suppressed. E)Mitochondria show enhanced capacity of oxidative phosphorylation.

Question

Quizplus · Accepted Answer

Dominant-negative mutations in petite strains of yeast will inhibit the function of wild-type mitochondria, resulting in a decrease in ATP production and respiratory capacity. This will lead to a petite phenotype, which is characterized by smaller and less functional mitochondria. Therefore, the choice that best describes the expression pattern of dominant-negative mutations in petite strains of yeast is D) The function of wild-type mitochondria is suppressed.

What Is the Expression Pattern of dominant- Negative Mutations in Petite