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Practice Questions_dr. Schlegel_may_aug2011 _pt.2

This quiz, created by Dr. Schlegel for the period May-August 2011, assesses knowledge in microbiology and genetics, focusing on mechanisms like quorum sensing, SOS response, and mutations. It's designed to enhance understanding...

Questions: 15 | Attempts: 167 | Last updated: Mar 21, 2025

Sample Question 1
Binding of an autoinducer peptide to the sensor kinase of a quorum sensing system in a Gram-positive bacterium leads to altered regulation of genetic loci present on different parts of the chromosome and transcribed in different directions. Which of the following would best describe the organization of the genes targeted by this quorum-sensing system?

Divergent operons

Regulon

Contrary operons

Divergent regulation

Indirect regulation

Sample Question 2
The SOS response is a DNA repair mechanism that responds to extreme DNA damage

True

False

Sample Question 3
Which 3 of the following could be required or produced by an organism using anaerobic respiration?

Organic acids

Cytochromes

Nitrite

Oxygen

Sulfate