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7+2 is what?  Do not submit this multiple-choice “test” until you have completed retake of ET2 (above) based on the directions that you have been sent regarding this event. 

A microbiology student cultures Serratia marcescens on agar plates. When incubated at room temperature (25°C), the colonies appear red. When incubated at human body temperature (37°C), the colonies appear white or cream. The change in colony color observed under different temperature conditions is an example of a change in the organism’s what? 

True or False Quorum sensing in biofilms always occurs between members of the same species.

What is the duplication of a cell’s DNA called? 

What is the process in which mutations are removed and the correct bases are added by DNA polymerase I? 

What macromolecule contains alternating N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM) chains cross-linked by short peptide fragments?

Select all that apply. In the life cycle of the pinworm Enterobius, a common pediatric infection, the child carries the adult worm in the intestine. The adult worm releases eggs, which are transmitted out of the body in the feces. The child will scratch the itching anal region, picking up the worm eggs and re-inserting them into their mouth. For this helminth life cycle, what type of host is the human? 

What is the size of a eukaryotic ribosome?

How is host range limited? 

Match the descriptive term used for bacteria with its correct definition.