A Microbiologist Performs a Genetic Experiment in Which Cultures of Escherichia

question 128

Multiple Choice

A microbiologist performs a genetic experiment in which cultures of Escherichia coli are treated with a chemical that induces a high frequency of mutations.  Individual bacterial colonies are isolated to identify a mutant strain that lacks a specific enzyme involved in DNA replication.  This specific enzyme is responsible for removing short fragments of RNA that are base paired to the DNA template.  Which of the following enzymes is most likely deficient in this strain of E coli?

• A)DNA polymerase I
• B)DNA polymerase III
• C)Gyrase
• D)Helicase
• E)Ligase
• F)Primase

---

Definitions:

Selective Recruitment

The process of targeting specific individuals or groups for recruitment based on predetermined criteria.

Statistical Discrimination

The practice of making decisions about groups of people based on statistical generalizations, rather than individual merit, often leading to unfair outcomes.

Neighborhood Location

The specific area or place within a larger urban or rural setting where a given community resides.

Formal Economy

The sector of the economy that operates within official regulations and is taxed and monitored by a government.