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Author Question: A scientist is studying a gene (grn) carried by a bacteriophage that allows a host bacterium to ... (Read 83 times)

CQXA

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on: Jan 12, 2022
A scientist is studying a gene (grn) carried by a bacteriophage that allows a host bacterium to produce a green metabolic product before lysis. The scientist has four bacteriophage mutants for this gene. Mutant 1 has a nonrevertible mutation in grn while Mutants 2, 3, and 4 each have a revertible mutation in grn. After plating pairs of mutants and subsequent coinfection of host cells, the scientist observed the following:
I.Mutants 1 and 2: no green product
II.Mutants 1 and 3: very rare green product
III.Mutants 1 and 4: rare green product

Which of the following is NOT consistent with these observations?
◦ A partial deletion in Mutant 1 overlaps a base-pair substitution in Mutant 2.
◦ Mutant 2 has a base-pair substitution at a different site than Mutant 3.
◦ Mutant 3 has a base-pair substitution at a different site than Mutant 4.
◦ Mutant 1's deletion is closer to the base-pair substitution in Mutant 3 than it is to the base-pair substitution in Mutant 4.
◦ A green product should be observed if coinfection occurs with mutants 3 and 4.
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Marked as best answer by CQXA on Jan 12, 2022

mbcrismon

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Reply #1 on: Jan 12, 2022
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CQXA

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Reply 2 on: Jan 12, 2022
Great answer, keep it coming :)

31809pancho

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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