BIOL 2421: EXAM #1 QUESTIONS AND ACCURATE
ANSWERS A+ GRADED
The primary role of microbes on the planet involves causing disease in animals and humans -
ANSWER Which of the following are FALSE concerning microbes?
human microbiome - ANSWER All microorganisms that regularly populate the human body
are referred to as the _______________________.
Capitalized genus name
lowercase species name
Entire name is always either underlined or italicized - ANSWER Format of scientific names?
fungi - ANSWER Consider organisms that are eukaryotic, are found in both unicellular and
multicellular forms, may resemble plants but are not photosynthetic, have chitin in their cell
walls, and absorb organic nutrients from decomposing material in the environment. These
organisms would be classified as which of the following types of organisms?
single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional
sources - ANSWER Domain: Eukarya
Beef broth - provided a nutritious environment to support microbial growth
,Bunsen burner (flame) -
provided heat that destroyed microorganisms already present in the beef broth.
Flask with S-shaped neck - provided the physical conditions for trapping airborne
contaminants and preventing microorganisms from entering the flask.
Air - provided a source of potential external microbial contaminants. - ANSWER Functions of
aspects of Pasteur's Experiment
A: Break near the mouth of the flask
B: Break before the first curve in the S-shaped neck (closest to flask) - ANSWER Pastuer's
S-shaped Flask: Which scenario would result in contamination of beef broth?
Gene expression in bacteria is very similar to gene expression in humans, which facilitates the
use of bacteria in recombinant biotechnology and gene therapy. - ANSWER Which of the
following is true of microbes?
vaccinations that control epidemiologic spread - ANSWER All of the following factors
contribute to the threat of emerging infectious diseases (EIDs) EXCEPT __________.
increased human exposure to new, unusual infectious agents in areas that are undergoing
ecological changes, such as deforestation and construction
,spread of known diseases to new geographic regions or populations by modern
transportation
evolutionary changes to existing organisms through genetic changes - ANSWER Which of the
following factors contribute to the threat of emerging infectious diseases (EIDs)?
Found in extreme environments
Not typically associated with human disease - ANSWER What is true of archaea?
The results of his experiment demonstrated that living organisms are derived from other
living organisms. - ANSWER What is true of Francesco Redi's 1688 Experiment?
The broth would become contaminated with microbes because they were trapped in the neck
- ANSWER Pastuer's Experiment: What would happen if you decided to tip the flasks so that
broth enters the long S-shaped neck. You then return the flask to its upright position. Predict
the most likely outcome of tipping one of Pasteur's S-necked flasks.
Inject the bacteria into an animal, observe whether the animal gets an infection similar to the
patient, and isolate the same strain of bacteria from the infection. - ANSWER To satisfy Koch's
postulates, what would a doctor need to do with an isolated bacteria to identify it?
, Antibiotics are not effective in treating viral infections.
Treatment with antibiotics can lead to the emergence of resistant strains.
Antibiotics may be toxic. - ANSWER Which of the following are limitations of antibiotics?
False - ANSWER T/F: Mass production of antibiotics is extremely difficult
False - ANSWER T/F: The cost of producing antibiotics is high, which in turn leads to higher
prices for consumers.
MRSA is transmissible - ANSWER Further characterization of the S. aureus isolated from
George's wound reveals that the strain is MRSA. Why is George's doctor concerned that
MRSA has been identified as the causative agent of George's infection?
*Signs = Objective information*; can be seen, measured, heard, or felt
- Color, pulse, temperature
*Symptoms = Subjective information. FELT ONLY BY PATIENT
- pain, nausea - ANSWER Signs vs Symptoms
These organisms are single- or multi-celled eukaryotes that contain chitin in their cell walls. -
ANSWERS A+ GRADED
The primary role of microbes on the planet involves causing disease in animals and humans -
ANSWER Which of the following are FALSE concerning microbes?
human microbiome - ANSWER All microorganisms that regularly populate the human body
are referred to as the _______________________.
Capitalized genus name
lowercase species name
Entire name is always either underlined or italicized - ANSWER Format of scientific names?
fungi - ANSWER Consider organisms that are eukaryotic, are found in both unicellular and
multicellular forms, may resemble plants but are not photosynthetic, have chitin in their cell
walls, and absorb organic nutrients from decomposing material in the environment. These
organisms would be classified as which of the following types of organisms?
single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional
sources - ANSWER Domain: Eukarya
Beef broth - provided a nutritious environment to support microbial growth
,Bunsen burner (flame) -
provided heat that destroyed microorganisms already present in the beef broth.
Flask with S-shaped neck - provided the physical conditions for trapping airborne
contaminants and preventing microorganisms from entering the flask.
Air - provided a source of potential external microbial contaminants. - ANSWER Functions of
aspects of Pasteur's Experiment
A: Break near the mouth of the flask
B: Break before the first curve in the S-shaped neck (closest to flask) - ANSWER Pastuer's
S-shaped Flask: Which scenario would result in contamination of beef broth?
Gene expression in bacteria is very similar to gene expression in humans, which facilitates the
use of bacteria in recombinant biotechnology and gene therapy. - ANSWER Which of the
following is true of microbes?
vaccinations that control epidemiologic spread - ANSWER All of the following factors
contribute to the threat of emerging infectious diseases (EIDs) EXCEPT __________.
increased human exposure to new, unusual infectious agents in areas that are undergoing
ecological changes, such as deforestation and construction
,spread of known diseases to new geographic regions or populations by modern
transportation
evolutionary changes to existing organisms through genetic changes - ANSWER Which of the
following factors contribute to the threat of emerging infectious diseases (EIDs)?
Found in extreme environments
Not typically associated with human disease - ANSWER What is true of archaea?
The results of his experiment demonstrated that living organisms are derived from other
living organisms. - ANSWER What is true of Francesco Redi's 1688 Experiment?
The broth would become contaminated with microbes because they were trapped in the neck
- ANSWER Pastuer's Experiment: What would happen if you decided to tip the flasks so that
broth enters the long S-shaped neck. You then return the flask to its upright position. Predict
the most likely outcome of tipping one of Pasteur's S-necked flasks.
Inject the bacteria into an animal, observe whether the animal gets an infection similar to the
patient, and isolate the same strain of bacteria from the infection. - ANSWER To satisfy Koch's
postulates, what would a doctor need to do with an isolated bacteria to identify it?
, Antibiotics are not effective in treating viral infections.
Treatment with antibiotics can lead to the emergence of resistant strains.
Antibiotics may be toxic. - ANSWER Which of the following are limitations of antibiotics?
False - ANSWER T/F: Mass production of antibiotics is extremely difficult
False - ANSWER T/F: The cost of producing antibiotics is high, which in turn leads to higher
prices for consumers.
MRSA is transmissible - ANSWER Further characterization of the S. aureus isolated from
George's wound reveals that the strain is MRSA. Why is George's doctor concerned that
MRSA has been identified as the causative agent of George's infection?
*Signs = Objective information*; can be seen, measured, heard, or felt
- Color, pulse, temperature
*Symptoms = Subjective information. FELT ONLY BY PATIENT
- pain, nausea - ANSWER Signs vs Symptoms
These organisms are single- or multi-celled eukaryotes that contain chitin in their cell walls. -
