A Scientist Is Studying a Gene (Grn) Carried by a Bacteriophage

question 3

Multiple Choice

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) Mutant 2 has a base- pair substitution at a different site than Mutant 3.
• B) A green product should be observed if coinfection occurs with mutants 3 and 4.
• C) 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.
• D) A partial deletion in Mutant 1 overlaps a base- pair substitution in Mutant 2.
• E) Mutant 3 has a base- pair substitution at a different site than Mutant 4.

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Definitions:

Correspondence Inference Theory

A psychological theory that explains how and why people draw inferences about the dispositional attributes of others based on observed behavior and its consequences.

Self-Serving Bias

Tendency to perceive our own behavior as more positive than others’ behavior.

Fundamental Attribution Error

Error that arises from attributing another person’s behavior to internal, controllable causes rather than to external, uncontrollable causes.

Stereotype

To place a person or group of persons into an inflexible, all-encompassing category.