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FO PO PR PE PO PO PR PFO Po PR PO PO Pe Pe Po PO PE POD Pe PL BIOL 2460 Microbiology Master > > 3 if eS 3 2. a g B a a ay & B a 2 | Which of the following parts was absent from Leeuwenhoek’s microscopes? Which is the correct order of the taxonomic categories, going from most specific to most general? How would you classify a virus? Which of the following is not considered a microorganism? Which process involves the deliberate alteration of an organism’s genclic material? When a hypothesis has been thoroughly supported by long-term study and date. it is considered. : Abiogenesis refers to the. 2 Which of the following is correctly ordered in sive from the smallest to the largest? Which of the following are not eukaryotic? Bonds in which atoms share electrons are defined as. bonds. RNA plays an important role in what biological process? DNA is a hereditary molecule that is composed of. a fhe charge of a proton is exactly balanced by the. charge of a(n). Proteins are synthesized by linking amino acids with. bonds. A solution with the pH of 2____than a solution with a pH of 8. z element is defined by the number of, : Hydrogen bonds can form between. adjacent to each other. a ‘lectrons move around the nucleus ofan atom in pathways called = a h Hest unit of matter with unique charactcristics is, ro Pe re PO PO FO PO PH PO PO PO Pe Po Pe RE PO PO RPO PO Pe BPO Motility is best observed with a__. Hanging drop preparation. Amicroscope that has a total magnification of 1,500X when using the oil immersion objective has an ocular of what power? 15x. The term culture refers to the growth of microorganisms in. . Macroscopic, media. The specimen for an electron microscope is always . Killed. A fastidious organism must be grown on what type of medium? Fnriched. Resolution is, with a longer wavelength of light. Worsened. Areal image is produced by the 7 Objective. A mixed culture is, . On¢ that contains two or morc known species. Bacteria tend to stain more readily with cationic (positively charged) dyes because bacterial surfaces. Contain large amounts of acidic substances. Agar has the disadvantage of being casily decomposed by microorganisms. False. Which of the following is not found in all bacterial cells? Actin-like cytoskeleton. Pili are tubular shafts in, bacteria that serve as a means of, . Gram-negative; genetic exchange. An cxamplc of a glycocalyx is Acapsule. Which of the following is a primary bacterial cell wall function? Support. Which of the following is present in both gram-positive and gram-negative cell walls? Peptidoglycan. Darkly stained granulcs are concentrated crystals of, thal arc found in PO,; Corynebacterium. Bacterial endospores usually function in . Survival. A bacterial arrangement in packets of eight cells is described as a, . Sarcina. To which division does L. coli belong? Gracilicutes Which stain is used to distinguish difference between the cell walls of medically important bacteria? Gram stain Both flagella and cilia are found primarily in ‘ Protozoa. PO Pe PO PO FO PO PR PO PO PO PO RO Po PR PR Pe Ro Ro PR Pe PO Acell exposed to a hypertonic environment will, by osmosis. Lose water. Which of the following statement is true for all organisms? They require inorganic nutrients. Psychrophiles would be expected to grow Atrefrigeration temperatures. The source of the necessary clements of life is An inorganic environmental reservoir. A pathogen would most accurately be described as a, . Parasite. Which of the following is truc of passive transport? Itrequires a gradient. Chemoautotrophs can survive on. alone. Minerals and CO,. An organism can synthesize all its required organic components from CO, using energy from the sun is a . Photoautotroph. Superoxide ion is toxic to strict anaerobes because they lack, * Dismutase. Which genes can be transferred by all three methods of horizontal gene transfer? Drug resistance. The nitrogen bases in DNA are bonded to the. . Deoxyribose. DNA replication is semiconservative because the strand will become half of the. molecule. Template; finished. When genes are turned on differently under different environmental conditions, this represents a change in, . Phenotype. In DNA, adenine is the complementary base for. . and cytosine is the complement for, * Thymine, guanine. What is the smallest unit of heredity? Gene. Which of the following would occur through specialized transduction? Transfer of genes for toxin production. Asa general rule, the template strand on DNA will always begin with, : TAC. The Jac operon is usually in the___and is activated by a/an____ molecule. Off, inducer. Transfer RNA is the molecule that 3 Adapts the genetic code to protein structure. An example of an agent that lowers the surface tension of cells is : Alcohol. Iligh temperatures. and low temperatures. Kill cells, inhibit cell growth. PO Pe re PO Ro PO PO FO PO PH PO PO PO Pe Po Pe RE PO Microbial control methods that kill/destroy. are able to sterilize. Fndospores. The primary mode of action of nonionizing radiation is to, é Make pyrimidine dimers. Achemical with sporicidal properties is . Glutaraldehyde. Microbe(s) that is/are the target(s) of pasteurization include . Both B and C. B) Mycobacierium species. C) Salmonella species Sanitization is a process by which . The microbial load on objects is reduced. The most practical method of disinfecting municipal water supplies would be. . Filtration. Silver nitrate is used___. In antisepsis of burns. Detergents are, Low-level germicides. Microbial resistance to drugs is acquired through, : All of these. Conjugation, transformation, transduction. R factors are that contain a code for. Plasmids, drug resistance. An antimicrobial drug with a therapeutic index is a better choice than one with a therapeutic index. High, low. Which of the following modes of action would be most selectively toxic? Preventing cell wall synthesis. Phage therapy is a technique that uses Phages to target pathogenic bacteria in the body. Most antihelminthic drugs function by. 4 Weakening the worms so they ean be flushed out by the intestine or inhibiting worm metabolism. The MIC is the, of a drug that is required to inhibit growth of a microbe. Smallest concentration. What statement is no/ an aim in the use of drugs in antimicrobial chemotherapy? This drug should Be broken down and excreted rapidly. Drugs that prevent the formation of the bacterial cell wall are . Beta-lactams. Acompound synthesized by a bacteria or fungi that destroys or inhibits the growth of other microbes is a/an, : Antibiotic. 
