A Neurospora Nonsense Mutation Known to Be UAG Is Treated

question 53

Multiple Choice

A Neurospora nonsense mutation known to be UAG is treated with two compounds,hydroxylamine and 5-bromouracil.Hydroxylamine (HA) causes G·C → A·T transitions,while 5-bromouracil causes T·A → C·G transitions.Which of these agents do you expect to induce revertants?

• A)Both agents are expected to induce revertants.
• B)Both agents are expected to induce revertants,but hydroxylamine will be more effective.
• C)5-bromouracil only is expected to induce revertants.
• D)Hydroxylamine only is expected to induce revertants.
• E)Neither hydroxylamine nor 5-bromouracil agents are expected to induce revertants.

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