Inquizitive Exam 1 UPDATED Questions and CORRECT Answers
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Inquizitive Exam 1 UPDATED Questions
and CORRECT Answers
most accurate and common definition of a microbe - CORRECT ANSWER- an organism
that can't be seen by the unaided human eye
Which of the following are helpful roles played by microbes in human health and ecology? -
CORRECT ANSWER- geoch...
Inquizitive Exam 1 UPDATED Questions
and CORRECT Answers
most accurate and common definition of a microbe - CORRECT ANSWER✔✔- an organism
that can't be seen by the unaided human eye
Which of the following are helpful roles played by microbes in human health and ecology? -
CORRECT ANSWER✔✔- geochemical
primary producers in marine environments
ground water purifiers
In the eighteenth century, it was observed that milkmaids were less likely to contract
smallpox than others. What caused this trend amongst milkmaids? - CORRECT
ANSWER✔✔- exposure to cowpox
Place Koch's postulates into the order used to determine what microbe is responsible for
causing a specific disease. - CORRECT ANSWER✔✔- 1. the microbe is found in all cases
of the disease but is absent from healthy individuals
2. microbe is isolated from diseased host and grown in pure culture
3. when microbe is introduced to healthy susceptible host, the same disease occurs
4. the same strain of microbe is obtained from newly diseased host
Which of the following best describes the germ theory of disease? - CORRECT
ANSWER✔✔- specific diseases are caused by specific microbes
What term refers to microbes that live within and provide essential functions to multicellular
organisms? - CORRECT ANSWER✔✔- endosymbiont
microbes dependent on growing on top of stone - CORRECT ANSWER✔✔- lithotrophs
the following is true of PCR (polymerase chain reaction) - CORRECT ANSWER✔✔- it uses
an enzyme isolated from microbes that live at high temps
it is a lab technique used to amplify DNA
,What difficulties arise when trying to rigorously apply Koch's postulates to show that HIV
causes AIDS? - CORRECT ANSWER✔✔- HIV cant be grown in a pure culture
it is unethical to knowingly introduce the virus to a healthy host
Which of the following is true of nitrogen fixation? - CORRECT ANSWER✔✔- certain
microbes can fix nitrogen
it is the conversion of nitrogen gas into ammonia
Although some microbes are pathogens, humans also harness microbes to enhance human
health. Which of the following are ways microbes are used in health care? - CORRECT
ANSWER✔✔- weakened forms of microbes= vaccines
microbes are screened as new sources of antibiotics
gene therapy
What is the name of a collection of cells all grown from a single parental cell? - CORRECT
ANSWER✔✔- pure culture
Why might it be difficult to decide whether an organism should be classified as a microbe or
not? - CORRECT ANSWER✔✔- some single celled organisms are visible w/o microscope
some multicellular animals are microscopic
When a host's white blood cells attack infecting pathogens, they will often damage nearby
tissues and cause symptoms. What do physicians and researchers call the process that causes
this damage? - CORRECT ANSWER✔✔- immunenopathegensis
Influenza is a deadly disease because the damage influenza causes in lungs predisposes
patients to developing other infections, such as bacterial pneumonia. We describe the
bacterial pneumonia as a(n) __________ infection.
Type an answer - CORRECT ANSWER✔✔- secondary
, For any organism, the infectious dose 50% (ID50) is ALWAYS lower than the lethal dose
50% (LD50). - CORRECT ANSWER✔✔- true
When there is an outbreak of an infectious disease, such as SARS or Ebola virus, airports will
often screen potential passengers and not allow individuals with a fever to board an
international flight. They are looking for ___________ of infection. - CORRECT
ANSWER✔✔- signs
Salmonella enterica serovar Typhimurium has a very low LD50 in mice but is generally not
lethal in humans. Salmonella enterica serovar Typhi causes typhoid fever in humans and has a
very low LD50 in humans, but it doesn't kill mice. This phenomenon can be explained by the
fact that the two serovars have different ___________. - CORRECT ANSWER✔✔- host
ranges
Insects like fleas and lice that both harm a host and benefit from living on a host are
described as ___________ . - CORRECT ANSWER✔✔- ectoparasites
Often the signs and symptoms of an infectious disease, including some sequelae, are caused
by the host's immune system killing microbes and nearby host tissues in an array of
consequences called __________ (the answer is a single term). - CORRECT ANSWER✔✔-
immunopathology
Which portal of entry is employed by organisms that are transmitted by flea or tick bite? -
CORRECT ANSWER✔✔- parentheral
Think of the last time you mixed oil and vinegar. The oil and vinegar separate spontaneously.
This same separation occurs in cells when triglycerides associate to form cytoplasmic
inclusions. Which of the following is responsible for this phenomenon? - CORRECT
ANSWER✔✔- hydrophobic interactions
polarity of water
amphipathic character
Which of the following results would you expect from a reaction where the enzyme was
accidentally boiled? - CORRECT ANSWER✔✔- reaction rate would decrease
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