Blog

There are several different types of E. coli bacteria, and only some of them cause disease in humans. Some of the disease-causing types produce a toxin (a protein) called Shiga toxin. The figure below is related to clinical samples of E. coli. “PCR for the Shiga toxin gene was performed on E. coli samples from healthy volunteers and patients with bloody diarrhea. Purified DNA from a known Shiga toxin-positive E. coli isolate was used in the positive control reaction (+), and the negative control reaction contained no DNA (-).” What kind of experimental technique was used?

Deadline extensions may be available for which of the following assignments? Choose all correct answers.

Select all of the following statements that are true about riboswitchs

Match the units to the proper types of measurements.

16S rRNA amplicon sequencing will identify which of the following members of the microbiome? (select all that apply)

Are L. lactis and S. thermophilus a complete clade? If so, which node represents their MRCA (most recent common ancestor)?

Select all of the following sequencing technologies that are considered 1st generation.

Factor-dependent termination of transcription involves the Tus protein binding to the rut site

Which node represents the MRCA (most recent common ancestor) of B. linens and L. casei?

Which of the following classes are spore forming Firmicutes? (select all that apply)