Exam 1: Humans and the Microbial World

Janus is a keen baseball player at the high school where you are employed as a nurse. He comes to your office and shows you an injury to his knee which he got by sliding into home base, scoring a game-winning run. His knee has a red, raw patch where the skin has been scraped off, and the area around the wound is swollen. Janus tells you that he washed his knee with soap and water to remove any germs and then put a bandage on it. -Janus asks you if there is something he can use to kill any bacteria in his wound without affecting any of his own body cells. You tell him that some antibiotics kill bacteria by targeting ________, a compound unique to bacteria.

Digestive tract microbiome plays no role in maintaining a person's health. 

Archaea are very similar to bacteria and have rigid cell walls made of peptidoglycan.

Sandy has been taking an antibiotic for a urinary tract infection (UTI). Although the signs and symptoms of Sandy's UTI resolved after a few days of taking the medication, she complains to you that she has been having watery diarrhea for the last two days, and she wonders whether the antibiotic is affecting her digestive tract. You take the opportunity to give her information about her normal microbiota. -You are concerned that Sandy may have a C. difficile infection. When normal microbiota is disturbed, organisms such as C. difficile may thrive. What caused the disturbance in Sandy's normal microbiota in this case?

Normal microbiota

Which of the following about the Golden Age of Medical Microbiology is False?

All of the statements regarding archaea are True EXCEPT

Viruses

Prions

Which of these may pertain to the term strain?

Microorganisms are involved in all of the following EXCEPT

Cellulose is a major component of plants and is only directly digested by

Spontaneous generation refers to the idea that organisms came from other organisms.

A new organism was found that was unicellular and 1 cm long. The "large" size of this organism alone would

Which of these scientists were involved in investigating the idea of spontaneous generation?

Ulcers, previously thought to be caused by stress, are in fact often caused by

The scientific name of an organism indicates its domain.

Viroids are naked (lacking a protein shell) pieces of RNA that infect plants.

Select the True statement(s) regarding eukaryotes.

Select the statement that is True regarding viroids.