Micro ch. 3

Valmau5 · 60 questions · 3 mo ago

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The standard unit of measure of length used in the metric system is the liter. True/False

false

The objectives of a compound microscope are a part of the illuminator system. True/False

False

The part of the microscope that controls the amount of light is the... A. Objective B. Ocular C. Condenser D. Stage

Auramine O is a fluorescent dye used to visualize Mycobacterium tuberculosis. True/False

True

Which of the following microscopes forms a halo around the specimens? A. Dark field B. TEM C. SEM D. Phase contrast

Gentian violet can be used as a counterstain for acid-fast staining. True/False

False

Some bacteria can form a protective barrier against harsh conditions known as a .... A. Flagellum B. Cilia C. Plaque D. Spore

Woese and Hesse are credited with the discovery of using agar in the lab. True/False

False

Which of the following structures allows the motility of the microbes and requires the use of Mordant to view? A. Cilia B. Capsule C. Flagella D. None of the above

Why is a capsule difficult to stain? A. Capsules are water soluble B. Capsules become gelatinous in media C. They are not difficult to stain D. None of the above

Reducing media is used to support the growth of aerobic microbes. True/False

False

Staphylococcus aureus ferments mannitol salt and turns the agar what color? A. Blue B. Red C. Pink D. Yellow

Blood agar is a combination of nutrients and the erythrocytes from what animal? A. Cat B. Cow C. Sheep D. Horse

Catalase positive results are marked by the appearance of what? A. CO2 B. Steam C. Bubbles D. Salt

When performing a coagulase test, if plasma clumps together it is most likely indicative of what microbe? A. E. Coli B. S. aureus C. S. cocci D. None of the above

What is the basic or standard unit of measurement for length used in the scientific community? a. Angstrom b. Centimeter c. Meter d. Nanometer

Which type of microscope lens is located farthest from the person viewing and closest to the specimen? a. Binocular b. Condenser c. Objective d. Ocular

Which laboratory diagnostic technique is used in suspected cases of rabies or syphilis? a. Bright-field b. Dark-field c. Oil immersion d. Immunofluorescence

Iodine serves as which of the following in the second step of the Gram stain process to increase the function of the other laboratory stains used? a. Agar b. Enzyme c. Fluorochrome d. Mordant

What is the term for the type of bacteria that have complex nutritional requirements and are grown on enriched media? a. Aerobic b. Fastidious c. Lactose-fermenting d. Sporulated

A dark-field condenser is added to which of the following microscopes to allow visualization of microbes that cannot be seen with regular lighting or staining methods? a. Compound light b. Electron c. Fluorescence d. Phase contrast

Which of the following microscopes is used for a 3-D view of the smallest microbes, viruses, and cellular surface structures? a. Compound light b. Fluorescence c. Scanning electron d. Transmission electron

Fluorochromes are types of which of the following? a. Culture media b. Nutrient agar c. Serology assays d. Special stains

A combination of nutrient agar and powdered hemoglobin is used to make which type of culture media? a. Blood agar b. Liquid broth c. MacConkey d. Chocolate agar

Bacterial motility is determined by which of the following laboratory analyses? a. Coagulase test b. Flow cytometry c. Hanging drop d. Nucleic acid hybridization

Which term describes the ability of a microscope lens to produce a clear image and the amount of detail produced? a. Differential media b. Phase contrast c. Refractive index d. Resolution

Which laboratory substance is made of red marine algae? a. Agar b. Antisera c. Amino acids d. Acid-fast stains

The chemical composition and thickness of a microbial cell wall is determined by the color achieved on which laboratory studies? a. Acid-fast staining b. Coagulase test c. Gram-stain d. Phage typing

Which bacterial features are whip-like appendages that assist in motility of certain species? a. Cell walls b. Flagella c. Nuclei d. Spores

Which of the following substances is an enzyme that causes the decomposition of hydrogen peroxide into water and oxygen? a. Antisera b. Catalase c. Coagulase d. Mordant

Which term describes the clear spaces on an agar-filled culture plate produced by the lysis of bacteria during phage- typing? a. Agglutination b. Antibodies c. Hybridization d. Plaque

Which part of the compound light microscope focuses onto the light specimens? A. Condenser B. Electrons C. Fixed stage D. Objective lens

Which of the following is filled with liquid agar that solidifies at an angle? A. Hanging drop B. Petri dish C. Slant D. Deep

Which laboratory identification test would give a result of clumping together of bacteria when exposed to specific antisera? A. Acid-fast staining B. Flow cytometry C. Hanging drop technique D. Slide agglutination

Which laboratory study is additionally preformed following Gram-positive result to determine the identity of Staphyloccus aureus by its virulence factor of causing blood clotting? A. Coagulate test B. Flagella staining C. Flow cytometry D. Phage typing

Which of the following personnel preform many, if not most of the wide variety of laboratory procedures used to identify microorganisms? A. Lab directors B. Microbiologists C. Surgical residents D. Lab technicians

The invention of which microscope created the ability of scientist to visualize tiny viruses for the first time? A. Bright field B. Compound light. C. Electron. D. Fluorescent.

Which types of microbes have a waxy coating that is best visualized with the use of an acid-fast staining process? A. Bacillus B. Mycobacterium C. Staphylococcus D. Vibrio

Which of the following is the primary stain used in spore, staining and capable of penetrating the spore wall? A. Crystal violet. B. India, Ink. C. Malachite green. D. Methylene blue.

Which type of selective media is both selective and differential and made of bile salts, lactose, and crystal violet? A. Blood agar B. Chocolate agar C. MacConkey agar D. Thayer-Martin agar

Which type of laboratory testing may be done in a doctors office using multi-test kits (enterprise-type) and provides discrete and expedited results? A. Amino acid sequencing. B. Clustered regularly interspaced short palindromic repeats. C. Enzyme-linked immunosorbent assays D. Rapid identification testing.

Which type of medium is specifically used for culturing anaerobic bacteria? A. Blood agar B. Eosin methylene blue C. Mannitol salt agar D. Reducing media

Which type of testing has been used to determine what is known as DNA fingerprinting in root cause analyses is of healthcare associated infections? A. Enterotube kit B. ELISA test C. Nucleic acid-base composition D. Phage typing

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