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Terms in this set (44)
Which of the following is the best method to sterilize heat-labile solutions?
Application of heat to living cells can result in all of the following EXCEPT
decreased thermal death time
Which of the following disinfectants acts by disrupting the plasma membrane?
Which of the following methods is used to preserve food by slowing the metabolic processes of foodborne microbes?
Which of the following treatments is the most effective for controlling microbial growth?
they are equal treatments
Which of the following regarding antimicrobial control agents is FALSE?
A true antimicrobial control agent is equally effective against both bacteria and viruses.
Which of the following results in lethal damage to nucleic acids?
heat, radiation, and some chemicals
An iodophor is a(n)
iodine mixed with a surfactant.
Which of the following substances is used for surgical hand scrubs?
Which of the following statements about archaea is FALSE?
They evolved before bacteria.
A biochemical test, in the microbiology world, is used to determine
capability of a microbe to perform a specific enzymatic activity.
The phylogenetic classification of bacteria is based on
In the scientific name Enterobacter aerogenes, Enterobacter is the
Bacteria and Archaea are similar in which of the following?
considered prokaryotic cells
One of the most popular taxonomic tools is DNA fingerprinting to develop profiles of organisms. These profiles provide direct information about
the similarities between nucleotide sequences.
If two organisms have similar rRNA sequences, you can conclude that they
evolved from a common ancestor.
A clone is
genetically identical cells derived from a single cell.
Which of the following are found primarily in the intestines of humans?
facultatively anaerobic gram-negative rods
You have isolated a bacterium that grows in a medium containing an organic substrate and nitrate in the absence of oxygen. The nitrate is reduced to nitrogen gas. You can be sure that this bacterium is
using anaerobic respiration.
Which of the following lacks a cell wall?
Which of the following form conidiospores?
actinomycetes and related organisms
Which of the following statements about the causative agent of Rocky Mountain spotted fever is FALSE?
It is found in soil and water.
Which of the following is the best reason to classify Streptococcus in the Lactobacillales?
spirochete — axial filament
enterics — gram-negative
aerobic, helical bacteria — gram-negative
mycobacteria — acid-fast
relating to or occurring in the intestines
The Gram stain is not suitable for identifying members of the Archaea.
Which of the following statements regarding fungi is FALSE?
Most fungi are pathogenic for humans.
dimorphic fungus — grows as a yeast or a mold
teleomorph — produces both sexual and asexual spores
dermatomycosis — fungal infection of the skin
systemic mycosis — fungal infection of body organs
Which of the following tends to be more complex in a parasitic helminth than in free-living helminths?
In the malaria parasite life cycle, humans are the ________ host, while mosquitoes are the ________ host as well as the vector.
Below are paired items referring to the heartworm Dirofilaria immitis. Which of the pairs is mismatched?
mosquito — definitive host
What do tapeworms eat?
You observe a mass of amoeba-like cells that swarm together, form a stalk, and produce spores. This is a(n)
cellular slime mold
You see acid-fast oocysts in a fecal sample from a patient who has diarrhea. What is the MOST likely cause?
Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?
They cannot reproduce themselves outside a host.
The definition of lysogeny is
Phage DNA is incorporated into host cell DNA.
A persistent infection is an infection in which
the disease process occurs gradually over a long period.
Lysogeny can result in all of the following EXCEPT
immunity to reinfection by any phage.
An envelope is acquired during which of the following steps?
An example of a latent viral infection is
specialized transduction differs from generalized transduction in that specialized transduction
Transfers a specific DNA.
Most RNA viruses carry which of the following enzymes?
RNA-dependent RNA polymerase
Which type of virus could most likely cause cancer?
Which of the following is living organism?
Recommended textbook explanations
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Biocalculus: Calculus, Probability, and Statistics for the Life Sciences
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