StraighterLine Microbiology Practice Test

These questions are part of the practice quiz. Start practicing

• What would best describe an organism that does not require oxygen for survival?
• Which statement is NOT true regarding glycolysis?
• Which class of eukaryotic microorganisms can be subdivided into groups such as Mastigophora, Sarcodina, Ciliophora, and Apicomplexa?
• Which organism is commonly associated with causing cellulitis?
• The ability of Tc cells to induce apoptosis in infected or cancerous cells depends on their production of which proteins?
• In a diagram of the three domains of life, where would Archaea be positioned?
• What is the process of forming glucose from various metabolic intermediates called?
• In which conditions does the cell wall help prevent the cell from bursting?
• Glycolysis and the Krebs cycle yield how many molecules of NADH per molecule of glucose during respiration?
• Which of the following is NOT true of transposons?
• What term describes the breaking down of complex molecules into simpler ones within a cell?
• Based on its composition, eosin-methylene blue agar is classified as what kind of medium?
• What is the main characteristic of viruses that distinguishes them from other microorganisms?
• Which domain is characterized by organisms that often live in extreme environments?
• Which test is used for the identification of Mycobacterium tuberculosis?
• Which type of microscope achieves the greatest resolution and highest magnification?
• Which of the following diseases is caused by a helminth?
• During a Gram stain, what is the effect of applying alcohol on Gram-negative cells?
• Why are antiviral drugs often difficult to develop?
• Which term refers to the mixing of genetic material between two microorganisms?
• A mutation that converts a normal codon into a stop codon is referred to as what?
• Which population is most at risk for group B Streptococcus infection?
• What type of test is usually performed to identify Enterobius vermicularis infection?
• Eosin-methylene blue agar is commonly used for growing which type of bacteria?
• Which step in the nitrogen cycle involves the removal of nitrogen from the atmosphere by bacteria?
• Which of the following terms best describes organisms that require complex organic substances for nutrition and are often multicellular?
• Which of the following statements is NOT true about nitrogenous bases?
• Which part of a microscope magnifies the specimen to produce a real image?
• In metabolic pathways, what typically happens when an end product accumulates?
• What technology allows for the production of human insulin for diabetics?
• The envelope of enveloped viruses is obtained through which process?
• What is always contained in the core of every virus particle?
• What type of medium would you use to grow anaerobic bacteria?
• Which type of microorganisms is primarily responsible for fermentation?
• Which of the following activities is an example of biotechnology?
• The process represented by the equation C6H12O6+C6H12O6---> C12H22O11+H2O is an example of what?
• What is produced by adding 1% to 5% agar to nutrient broth that is then boiled and cooled?
• Cellulitis is caused by which of the following microorganisms?
• In the context of microbiology, what does the term "bioremediation" refer to?
• The full extent of the diversity and abundance of Earth has been understood only recently due to?
• Which microorganism is commonly used in the production of yogurt?
• In genetics, what does the term 'phenotype' refer to?
• What best describes noncompetitive inhibition?
• For bacterial survival, which structure would be most beneficial for a bacterial cell?
• Which field of study focuses on the classification and naming of organisms?
• In gingivitis, which of the following is a common contributing factor?
• What is the primary function of ribosomes in a cell?
• Which type of pathogen is responsible for causing malaria?
• Media used for coliform enumeration often changes color based on the enzymes present in the microbes. This type of medium is termed?
• Which of the following is a chemical used by phagocytes to destroy ingested foreign substances?
• What process allows bacteria to take up naked DNA from their environment and incorporate it into their genome?
• Which type of fungal spores are formed asexually by fungi?
• Polysaccharides include which of the following?
• Which of the following are types of viral nucleic acids?
• What event occurs with the sensitizing dose of allergen?
• Which of the following is not associated with sepsis?
• What type of microscope shows cells against a white background?
• Which component is a characteristic of eukaryotic chromosomes that prokaryotic chromosomes lack?
• Why has the use of bacterial viruses to eliminate bacterial infections made a comeback?
• What part of the microscope holds and allows selection of the objective lenses?
• What does "secondary infection" refer to?
• Mannitol salt agar is selective for Staphylococcus aureus because this organism...
• What effect does a high concentration of H+ ions have on pH?
• The vaccine that provides immunity to Haemophilus influenzae type b is referred to as:
• What is the only way to prevent non-neonatal conjunctivitis?
• What characteristic of jelly prevents microbial growth even after extended use?
• If the H+ concentration of pure water is increased to ten times the original concentration, what will be the resulting OH- concentration?
• Which statement regarding Bacillus anthracis is incorrect?
• What is a defining feature of eukaryotic cells?
• What term describes the transfer of DNA fragments from a dead cell to a live, competent recipient cell?
• What is the mechanism by which penicillin functions as an antimicrobial agent?
• Which enzyme is essential for the removal of RNA primers during DNA replication?
• What component of the nitrogen cycle converts ammonia to nitrites?
• Which of the following is characteristic of aerobic respiration?
• In which host do adulthood and mating of helminths occur?
• The two major groups of helminths are?
• Which technique is commonly used to separate DNA fragments based on size?
• The chemical bonds in peptidoglycan can be hydrolyzed by which enzyme found in tears and saliva?
• Which process involves breaking down glucose to produce energy?
• An acute infection is defined by which characteristic?
• What term describes the process by which messenger RNA is synthesized from a DNA template?
• The activation of a prophage is referred to as what?
• If a newly isolated bacterium shows coccobacillus morphology and can appear filamentous or cocci under different media, what does this indicate?
• A protozoan having a flagellum would be classified in which genus?
• A pure culture contains?
• Which type of mutation is considered the most serious?
• Which term best describes an organism that is photosynthetic but can also use organic compounds for energy in the absence of light?
• Which of the following is a characteristic of superantigens?
• Endospores are characterized by which of the following traits?
• Eosin-methylene blue agar is best described as?
• Extreme halophiles are adapted to which type of environment?
• Sterilization is primarily achieved by?
• What type of immune response is characterized by the recognition of specific antigens after exposure?
• What characterizes a mixed infection?
• Which metabolic system description is mismatched?
• Which of the following diseases exhibits the highest mortality rate?
• Which substance is necessary for the enzyme cellulose to degrade cellulose in wood?
• Which statement is true regarding viruses?
• Which enzymes convert the toxic superoxide ion into harmless products?
• What is a characteristic feature of a virus?
• What is the main purpose of using a plasmid in genetic engineering?
• Production of a neurotoxin that binds to target sites on spinal cord neurons responsible for inhibiting skeletal muscle contraction is a characteristic of...
• What type of bonds result from the sharing of electrons?
• Genetic material can be excised from one chromosome and directly integrated into another via what mechanism?
• An organism with a temperature growth range of 45 C to 60 C would be called?
• All of the following pertain to virus envelopes EXCEPT:
• In which type of pathogen attack is the risk of secondary infections heightened?
• What type of bacteria are often found in the normal human microbiota and can outcompete pathogens?
• What is the role of clavamox in the context of antibiotics?
• What is the time interval from parent cell to the formation of two new daughter cells called?
• What term describes anything that occupies space and mass?
• The symptoms that occur in cyclic 48- to 72-hour episodes in a malaria patient are...
• What are the early symptoms of Lyme disease?
• What is the purpose of using a control in an experiment?
• Which treatment is typically used for Lyme disease?
• What does the endosymbiotic theory explain?
• What are infectious proteins called?
• Hyperthermophiles are adapted to what kind of temperatures?
• Which of the following is a sign or symptom of meningitis?
• Which of the following is not classified as a polysaccharide?
• Why are waterlogged soils often considered infertile?
• What is used for mediated transport of polar molecules across the plasma membrane?
• What is the most common resident biota of mouth surfaces?
• Which enzymes are primarily used to amplify DNA during PCR?
• Which of the following is considered a promising treatment for stopping the expression of an unwanted gene?
• Which molecule is crucial for the reduction of NAD during glycolysis?
• Which of the following is not a function of the eukaryotic glycocalyx?
• What is the significance of identifying bright pink-red bacillus-shaped bacteria in a clinical sample?
• What type of cells require a cell wall to maintain their structure?
• What is incorrect regarding the overgrowth of algae due to farm run-off?
• What is one important distinguishing feature of Gram-negative bacteria?
• An organism that can exist in both oxygen and oxygen-free environments is a?
• The method of removing vegetative life forms from living surfaces is termed?
• Genetic markers that distinguish a self cell from a foreign invader are typically...
• How can one effectively test for allergies?
• Which type of infection is characterized by its ability to spread to multiple organs?
• Which term refers to the energy-releasing reactions in cellular metabolism?
• Labeled, known, short stretches of DNA used to detect a specific sequence of nucleotides in a mixture are known as what?
• What is the end product of glycolysis?
• A reducing medium contains which type of substances?
• Which form of bacterial communication is enhanced by direct contact between cells?
• What characterizes a local infection?
• Why do the hands, feet, and breasts have more lymphatic vessels compared to other areas of the body?
• What role do endospores play in microbial survival?
• What is the primary function of glycolysis in cells?
• Which statement most accurately reflects the process of plant material digestion in humans?
• What are the subunits that make up the DNA of an organism?
• How can microbial drug resistance be introduced into a population?
• During which phase does DNA exist as chromatin in eukaryotic cells?
• What would indicate a successful outcome of a tuberculin skin test?
• The vast array of antibodies corresponds to a variety of antigens due to which of the following processes?
• In which type of reactions do exergenic reactions typically occur?
• Chancroid is caused by which organism?
• Which of the following organisms can be classified as genetically modified organisms?
• Which of these antibiotics has the most narrow-spectrum activity?
• In a laboratory culture, what are plaques indicative of when cells are infected by a virus?
• Lysozyme is most effective against which type of organisms?
• Which of the following processes can occur in the absence of oxygen?
• What type of organism is Chlamydia trachomatis?
• What is produced from NADH during the electron transport chain?
• What are packets of energy delivered by the sun known as?
• What is it called when enzyme action is stopped due to an accumulation of an end product acting as a regulatory molecule?
• Which structure is essential for bacterial motility?
• Superantigens are known to:
• Which of the following is NOT one of the primary components of a nucleotide?
• What is the primary purpose of the lymphatic system in host defense?
• What component is primarily responsible for the rigidity of bacterial cell walls?
• Which of the following characteristics is shared by all cells?
• Which of the following is NOT a method of microbial control?
• Which cellular process is primarily responsible for energy production in aerobic organisms?
• The division of microbes termed the Firmicutes has a cell wall type most accurately described as what?
• Which organism anaerobically reduces sulfates to hydrogen sulfide or metal sulfide?
• Which cells play a significant role in graft rejection?
• The normal pH range for most bacterial growth is?
• The endosymbiotic theory states that precursor eukaryotic cells acquired cilia from which type of ancestor?
• The mutualistic partnership between plant roots and microbes is known as?
• What do methanogens convert into methane?
• Where does ATP synthesis occur in bacterial cells?
• What characterizes satellite viruses?
• What macromolecule do viroids consist of?
• Which of the following protozoa are known for being non-motile?
• Which organism helps termites digest cellulose?
• Which metabolic process is primarily used by bacteria to break down glucose anaerobically?
• Which of the following is a characteristic of prokaryotic cells?
• What term refers to the process by which a cell binds to a substance causing a conformational change for movement across the membrane?
• Bacteriophages are applied to cold cuts primarily to combat which type of bacteria?
• The oxidation of ammonia (NH4+) to nitrate (NO3-) is referred to as?
• Most biochemical macromolecules are polymers, which are chains of what?
• In microbial genetics, what is horizontal gene transfer?
• A scientist studying rRNA nucleotide sequences of bacterial species is working on which concept?
• What do we call a permanent, inheritable change in genetic information?
• Which process occurs when two molecules combine, releasing a water molecule?
• Which term describes the transfer of genetic material between bacteria through a bacteriophage?
• A diagnosis of tuberculosis typically includes which of the following tests?
• Which statement about the effects of infection with Haemophilus ducreyi is true?
• The field of genomics is best described as what?
• What does semiconservative replication refer to in DNA synthesis?
• What is the typical role of TH cells in the immune response?
• What does not indicate microbe involvement in energy and nutrient flow?
• Which of the following is not typically used as a chemical preservative in food?
• If a microscopic examination of a lung aspirate shows bright pink-red bacillus-shaped bacteria, what does this indicate?
• What term describes all of the genetic material within a cell?
• Enterobius vermicularis is classified as:
• What type of microorganism is primarily affected by lysozyme?
• What can be concluded about a bacterium that varies in shape when cultured in different media?
• What process primarily involves the use of DNA polymerase?
• Humoral immunity primarily involves which type of cell?
• What complications can arise from Lyme disease?
• Which chemical is commonly used in both water purification and sewage treatment for long-term disinfection?
• What is a common characteristic of Staphylococcus aureus?
• Which group of microorganisms is composed only of hereditary material wrapped in a protein covering?
• What distinguishes beta-lactams in terms of selectivity?
• What is toxemia?
• The alcohol wipe used on a patient's skin before an injection is an example of which practice?
• Which of the following diseases is primarily caused by bacterial infection?
• What type of biological molecule are antibodies?
• An example of an amphipathic molecule found in living cells is what?
• What is produced during the Krebs cycle?
• Reactants are converted to products by what process?
• What is the role of sex pili in bacterial conjugation?
• Which type of RNA is primarily involved in transporting amino acids to the ribosome?
• Which type of microorganisms adapt to very low temperatures?
• What does a specialized codon with no corresponding tRNA signal in prokaryotic protein synthesis?
• Which of the following is the primary function of lysozyme?
• What is a common treatment approach for bacterial infections in recent years?
• What type of mutations can affect an entire gene and lead to a malfunction?
• What type of relationship exists between termites and the protozoan Trichonympha?
• What type of microorganisms are thermoplasmas adapted to?
• Which structure is responsible for the packaging and transport of proteins within the cell?
• The two major groups of helminths are which of the following?
• What immune cell secretes numerous cytokines that help to coordinate the response of other immune cells?
• What traditional basis was used for the illustration of phylogenetic relationships among organisms?
• Which type of bacteria are known to have a thick peptidoglycan layer?
• What term is used to describe the study of how living organisms are classified?
• What process involves removing mutations and adding the correct bases?
• In the cell, energy released by electrons is often used to phosphorylate which molecule?
• Thermococcus litoralis and Thermus aquaticus are known for providing what type of enzyme?
• A direct immunofluorescence test primarily involves what type of interaction?
• What component in the cell cytoplasm is characterized as a solute?
• What is the role of restriction enzymes in molecular biology?
• Which of the following represents a scientific name?
• Which type of test does the QuantiFERON-TB gold test fall under?
• What type of medium is recommended for shipping a bacterial sample from a clinic to a laboratory?
• Which feature is not a protective characteristic of the skin?
• A nucleotide consists of which three components?
• What is the term for using microbes to detoxify sites contaminated with heavy metals?
• Which of the following processes can be used to amplify DNA segments?
• Which of the following microorganisms are classified as noncellular?
• What is the principal concern with individuals experiencing toxemia?
• What are the light-harvesting units located in the thylakoid membranes called?
• Which of the following statements about Taenia and Trichinella is incorrect?
• What are two main functions of bacterial appendages?
• Where does an exoenzyme primarily participate in a chemical reaction?
• Which organism can use gaseous oxygen in metabolism and has the enzymes to process toxic oxygen products?
• What term is used for microorganisms that recycle nutrients by breaking down dead matter and wastes?
• If the wild type DNA reads "THE CAT ATE THE BIG RAT," what would be the mutation that changes it to "THE CAT ATE THE BAG RAT"?
• Which structure is involved in the attachment of bacteria to surfaces?
• The Tuskegee Study primarily gathered information on which disease?
• Major elements of a microbial cell include?
• When a eukaryotic cell is not undergoing mitosis, how is its DNA typically organized?
• Which type of microorganism is primarily unicellular and can be found in moist environments?
• Bacteria that require special growth factors and complex nutrients are termed what?
• Which cells are known as antigen presenting cells?
• Histones are classified as what type of biological molecule?
• Gingivitis is primarily caused by: