The process of forming mRNA from the template strand of DNA is called _____________
Which of the following sequences would result from the replication of the following DNA sequence: ATTGCTGGA
Which test uses a medium that is both selective and differential for members of the genus Staphylococcus?
Mannitol Salt agar
Bile esculin hydrolysis
Which of the following processes removes or destroys endospores?
The purpose of heat fixation is to _______.
Adjust the morphology of the organisms on the slide
Encourage growth of bacterial cells on the slide
Inactivate and adhere microorganisms placed on the slide
Harden the bacteria so that they are not destroyed by the staining procedure
Eukaryotes have membrane-bound organelles
A pure culture contains
a known number of organisms
two types of known microorganisms
one type of microorganism
The internationally recognized reference for bacterial classification and identification is called Bergey's Manual
How is a glass culture tube handled during aseptic transfers?
The mouth is held in the flame while the inoculating tool is inserted for removal of organisms
The cap is removed and placed on the table away from the flame
The bottom of the tube is held in the flame for 10 seconds
The mouth is passed through the flame right when opened and just before closing
How is a respirometer used to measure fermentation in the Cellular Respiration experiment?
By the amount of glucose consumed
By the size of the gas bubble produced
By the amount of ATP produced
By the amount of gas consumed
Which organelle is involved in the packaging of proteins for secretion?
Rough endoplasmic reticulum
Which statement correctly describes the level of contamination on different objects?
Different objects will increase in their level of contamination with described temperature
Different objects will have the same level of contamination.
Environments in contact with animals and humans are likely to be less contaminated due to hygiene practices.
Different objects will vary in their level of contamination.
Which type of reaction(s) requires oxygen as a substrate?
Both aerobic and anaerobic reactions require oxygen
Neither reactions require oxygen
Catalase breaks hydrogen peroxide down in water and carbon dioxide
Which of the following is true of a bacterial species that produces dark colonies when grown on MacConkey agar.
They are glucose fermenters
They are lactose fermenters
They produce urease
They reduce nitrate to nitrite
Phenol red carbohydrate broths with Durham tubes can detect all of the following EXCEPT
All of the following are common to all cells at some point in their development EXCEPT:
The cell wall
The cell membrane
In the Gram stain, the chemical that fixes dye in or on cells by forming an insoluble compound in referred to as the _______________?
All of the following are true of an enzyme-catalyzed reaction EXCEPT?
An enzyme reduces the activation energy
Every time a substrate is converted to a product, a bit of the enzyme is used up
The enzyme speeds up the conversion of substrate to product
Enzymes are not used up in the chemical reaction
Which of the following diseases are caused by acid-fast bacterium:
If an organism produces stable acids as an end-product of glucose fermentation, the methyl red test will be red, indicating a positive result.
Immersion oil must only be used with which objective lens?
An antimicrobial, such as isoniazid, that is only effective against mycobacterial species would be referred to as a __________ drug.
Most human pathogens are classified as thermophiles.
In living organisms, information for making proteins flows from _______?
RNA to DNA to protein.
RNA to protein to DNA
DNA to RNA to protein
Protein to RNA to DNA
Microorganisms can be described as being ubiquitous which means that they:
All grow uniformly on an agar plate
Are present on nearly every surface
Can only grow on solid surfaces
Can only grow in the absence of oxygen
Stains are commonly used for all of the following EXCEPT
The pathogen identification process
The diagnosis of disease
The classification of organisms
The treatment of disease
The monomers that make up DNA molecules are called _______?
Which of the following is a chemical means of controlling microbial growth?
All of the following organisms are expected to grow within an anaerobe jar EXCEPT
The cloudy growth seen in a broth culture is referred to as
An antibiotic which interferes with the activity of ribosomes would have the most effect on which of the following?
The cell wall
Cell membrane function
When a large zone of no growth is found around an antibiotic disc being used for identification purposed, this generally means that the microbe is ______ to the antibiotic
All of the following are methods that can be used to isolate bacteria from a mixed culture EXCEPT?
Loop dilution pour plating
Serial dilution followed by spread plating
The smallest living units of the human body are __________.
When first viewing a specimen using the brightfield microscope, it is recommended that you begin viewing the specimen with which objective lens?
4X (scanning objective)
Before attempting to identify an unknown bacterial species, the organism must be isolated in a pure culture.
In addition to linking together nucleotides to synthesize a daughter strand, DNA polymerase also ________
Unzips the parent DNA molecule
"proofreads" the order of nucleotides
Makes the new DNA strand form a helix
"zips" the parent molecule back together
All of the following are found in most prokaryotic cells EXCEPT
The sources of all antimicrobial drugs are fungi and other microorganisms.
Which carbohydrate is the primary or preferred starting compound for glycolysis and the fermentation pathway?
All of the following body sites normally have large numbers of resident microbiota EXCEPT?
Human skin provides an environment with NaCl levels slightly above that of most bacterial cells. Which organism would most likely be found on the skin?
A halotolerant organism
An organism that does not tolerate hypertonic salt conditions very well
An obligate anaerobe
Gram negative cells appear purple after Gram staining whereas gram positive cells appear pink
An organism has been shown to produce hydrogen sulfide and indole in its metabolism. These are examples of _____ characteristics that can be helpful in the identification of the microorganism.
A hypertonic solution is prepared by the addition of sucrose. Which of the following would happen to bacteria placed in this solution:
The bacterial cells will swell, but not lyse
There will be no change in the bacterial cells
The bacterial cells will undergo osmotic lysis
The bacterial cells will undergo plasmolysis
Which of the following items would be disposed of into the sharps container?
Used paper towels
Bacterial culture plates
Used microscope slides
When is it crucial to wear protective eyewear when working in the lab?
When using the microscope
When using a Bunsen burner
When working with hazardous chemicals
When working with sharp objects
The term aerobic, anaerobic, and microaerophilic are used to categorize microorganisms based on their ______ requirements.
The ability to distinguish fine detail or discriminate between two very closely spaced objects is called:
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- Submitted On 27 Jun, 2018 05:18:18