3. In observation of a smear using the microscope, resolution is achieved through the use of A) the condenser B) oil imm

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3 In Observation Of A Smear Using The Microscope Resolution Is Achieved Through The Use Of A The Condenser B Oil Imm 1 (104.26 KiB) Viewed 10 times

3. In observation of a smear using the microscope, resolution is achieved through the use of A) the condenser B) oil immersion objective C) diaphragm D) either of the above E) none of the above = identify 10. A catalase positive gram positive coccl that produces a clot with citrated plasma is most characteristic of the following: A) growth on MacConkey's agar B) failure to produce bubbles upon the addition of hydrogen peroxide C) contains the enzyme oxidase D) presence of enterotoxin in improperly stored or cooked food particularly meats or pastries E) none of the above = identify 17. Rheumatic fever is a disease that results from the destruction of cardiac tissue by the immune system. This is a an example of A) reaction to antigen antibody tissue deposition by pyrogenic infections by Group A Streptococci B) natural immunity due to antibodies in nasal secretions C) autoimmune disease - IgG antibodies D) the clonal selection theory in action believed to be characteristic of b lymphocytes in antibody production E) none of the above 20. When animals and humans are subjected to drugs and antibiotics over long periods of time, the bacteria which may be associated with infections may acquire A) selective toxicity B) broad spectrum antibiotic susceptibility C) multiple resistant genes D) all of the above E) none of the above identify 24. One reason that immunity may not develop with many infections which may be caused by a variety of different microorganisms is due to failure of the microorganisms to stimulate A) a deficiency in the variable region of both light and heavy chains B) antigens C) memory B cells D) lysozyme E) all of the above 40. Lactobacilli, often used in the production of various cheeses and milk products, retains the crystal violet iodine complex after washing with acetone/alcohol. Therefore, this organism A) will produce colorless colonies of EMB B) will not grow on blood agar C) produces colorless colonies on EMB agar D) will not grow on MacConkey's agar E) none of the above identify (If the answer is this, identify the correct answer)