Of the following food products, which one was the most likely the source of Mr. Williams's infection?

a. cheese
b. raw milk
c. eggs
d. cream


Ans: b. raw milk

Biology & Microbiology

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During conscious quiet rest, the brain is emitting ____

a. alpha waves b. beta waves c. delta waves d. gamma waves e. rapid, irregular waves

Biology & Microbiology

The PCR (polymerase chain reaction) protocol that is currently used in laboratories was facilitated by the discovery of a bacterium called Thermus aquaticus in a hot spring inside Yellowstone National Park, in Wyoming

This organism contains a heat-stable form of DNA polymerase known as Taq polymerase, which continues to function even after it has been heated to 95°C. Why would such a heat-stable polymerase be beneficial in PCR? A) Each cycle includes a "hot" denaturation phase (95°C), which activates the Taq polymerase. B) Each cycle includes a "hot" saturation phase (95°C), which allows the primers to anneal to the target DNA. C) Each cycle includes a "hot" denaturation phase (95°C), which separates the hydrogen bonds that hold the strands of the template DNA together. D) Each cycle includes a "hot" denaturation phase (95°C), which serves to sterilize the culture. E) More than one of the above are correct.

Biology & Microbiology

According to the picture, which hypothesis would most likely be tested using this setup?

a) light needed for the process of respiration b) glucose is not photosynthesized by plants in the dark c) protein synthesis takes place in leaves

Biology & Microbiology

What other enzyme is the Cas9 enzyme most similar to?

A) DNA polymerase B) DNA ligase C) a restriction enzyme D) reverse transcriptase

Biology & Microbiology